Commit Graph

5280 Commits

Author SHA1 Message Date
Linus Torvalds
448bfad8a1 Merge branch 'for-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
Pull thermal fixes from Zhang Rui:
 "Specifics:

   - update Email address of Thermal subsystem maintainer Eduardo
     Valentin.

   - fix a problem that unloading thermal module results in kernel crash
     because a non-exist device file is removed on thermal unload.

   - fix a problem that critical trip point is set wrongly on latest
     i.MX6 SOC and results in system critical shutdown.

   - a couple of fixes to Tmon tool, of-thermal code and ti thermal
     driver"

* 'for-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
  tmon: set umask to a reasonable value
  tmon: Check log file for common secuirty issues
  tools/thermal: tmon: fix compilation errors when building statically
  thermal: ti-soc-thermal: ti-bandgap.c: Cleaning up wrong address is checked
  Thermal: imx: correct critical trip temperature setting
  thermal: Bind cooling devices with the correct arguments
  thermal: Add braces around suspect code
  thermal: hwmon: Make the check for critical temp valid consistent
  MAINTAINERS: Update Eduardo Valentin's email address
2014-07-07 13:23:13 -07:00
Linus Torvalds
034a0f6b7d USB bugfixes for 3.16-rc4
Here's a round of USB bugfixes, quirk additions, and new device ids for
 3.16-rc4.  Nothing major in here at all, just a bunch of tiny changes.
 All have been in linux-next with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-3.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB bugfixes from Greg KH:
 "Here's a round of USB bugfixes, quirk additions, and new device ids
  for 3.16-rc4.  Nothing major in here at all, just a bunch of tiny
  changes.  All have been in linux-next with no reported issues"

* tag 'usb-3.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (33 commits)
  usb: chipidea: udc: delete td from req's td list at ep_dequeue
  usb: Kconfig: make EHCI_MSM selectable for QCOM SOCs
  usb-storage/SCSI: Add broken_fua blacklist flag
  usb: musb: dsps: fix the base address for accessing the mode register
  tools: ffs-test: fix header values endianess
  usb: phy: msm: Do not do runtime pm if the phy is not idle
  usb: musb: Ensure that cppi41 timer gets armed on premature DMA TX irq
  usb: gadget: gr_udc: Fix check for invalid number of microframes
  usb: musb: Fix panic upon musb_am335x module removal
  usb: gadget: f_fs: resurect usb_functionfs_descs_head structure
  Revert "tools: ffs-test: convert to new descriptor format fixing compilation error"
  xhci: Fix runtime suspended xhci from blocking system suspend.
  xhci: clear root port wake on bits if controller isn't wake-up capable
  xhci: correct burst count field for isoc transfers on 1.0 xhci hosts
  xhci: Use correct SLOT ID when handling a reset device command
  MAINTAINERS: update e-mail address
  usb: option: add/modify Olivetti Olicard modems
  USB: ftdi_sio: fix null deref at port probe
  MAINTAINERS: drop two usb-serial subdriver entries
  USB: option: add device ID for SpeedUp SU9800 usb 3g modem
  ...
2014-07-03 19:12:58 -07:00
Shuah Khan
e84f1ab33c tools/testing/selftests/ipc/msgque.c: improve error handling when not running as root
The test fails in the middle when it is not run as root while accessing
/proc/sys/kernel/msg_next_id.  Changed it to check for root at the
beginning of the test and exit if not root.

Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Davidlohr Bueso <davidlohr@hp.com>
Cc: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-07-03 09:21:54 -07:00
Shuah Khan
e98f776224 tools: memory-hotplug fix unexpected operator error
on-off-test uses "$UID != 0" to test for root, but $UID is a construct
specific to bash.  Using /bin/sh that isn't bash results in the
following error (due to the "$UID" part expanding to nothing):

  ./on-off-test.sh: 9: [: !=: unexpected operator

Change Makefile to use bash instead.

Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-07-03 09:21:53 -07:00
Shuah Khan
1bd702e665 tools: cpu-hotplug fix unexpected operator error
on-off-test uses "$UID != 0" to test for root, but $UID is a construct
specific to bash.  Using /bin/sh that isn't bash results in the
following error (due to the "$UID" part expanding to nothing):

  ./on-off-test.sh: 9: [: !=: unexpected operator

Change Makefile to use bash instead.

Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-07-03 09:21:53 -07:00
Neil Horman
4adccf9fc8 tmon: set umask to a reasonable value
Currently, the tmon umask value is set to 0, which means whatever the permission
mask in the shell are when starting tmon in daemon mode are what the permissions
of any created files will be.  We should likely set something more explicit, so
lets go with the usual 022

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
2014-07-01 22:00:51 +08:00
Neil Horman
951fda3d8c tmon: Check log file for common secuirty issues
The tmon logging system blindly opens its log file on a static path, making it
very easy for someone to redirect that log information to inappropriate places
or overwrite other users data.  Do some easy checking to make sure we're not
logging to a symlink or a file owned by another user.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
2014-07-01 22:00:38 +08:00
Greg Kroah-Hartman
ba1ba3a4ed usb: fixes for v3.16-rc4
A few more fixes for this RC cycle. There's a revert of a previous patch
 which ended up being the wrong version, so we reverted that commit and
 applied a better fix.
 
 CPPI41 got a race condition fix which was found by Thomas Gleixner.
 
 The MSM PHY driver got a runtime pm usage fix so that it wouldn't
 kill the PHY while it was still being used.
 
 We also have a fix for a panic caused when removing musb_am335x driver.
 
 Other than that, a few other minor fixes.
 
 Signed-of-by: Felipe Balbi <balbi@ti.com>
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Merge tag 'fixes-for-v3.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-linus

Felipe writes:

usb: fixes for v3.16-rc4

A few more fixes for this RC cycle. There's a revert of a previous patch
which ended up being the wrong version, so we reverted that commit and
applied a better fix.

CPPI41 got a race condition fix which was found by Thomas Gleixner.

The MSM PHY driver got a runtime pm usage fix so that it wouldn't
kill the PHY while it was still being used.

We also have a fix for a panic caused when removing musb_am335x driver.

Other than that, a few other minor fixes.

Signed-of-by: Felipe Balbi <balbi@ti.com>
2014-06-30 21:15:15 -07:00
Javi Merino
6b533269fb tools/thermal: tmon: fix compilation errors when building statically
tmon fails to build statically with the following error:

$ make LDFLAGS=-static
gcc -O1 -Wall -Wshadow -W -Wformat -Wimplicit-function-declaration -Wimplicit-int -fstack-protector -D VERSION=\"1.0\" -static tmon.o tui.o sysfs.o pid.o   -o tmon -lm -lpanel -lncursesw  -lpthread
tmon.o: In function `tmon_sig_handler':
tmon.c:(.text+0x21): undefined reference to `stdscr'
tmon.o: In function `tmon_cleanup':
tmon.c:(.text+0xb9): undefined reference to `stdscr'
tmon.c:(.text+0x11e): undefined reference to `stdscr'
tmon.c:(.text+0x123): undefined reference to `keypad'
tmon.c:(.text+0x12d): undefined reference to `nocbreak'
tmon.o: In function `main':
tmon.c:(.text+0x785): undefined reference to `stdscr'
tmon.c:(.text+0x78a): undefined reference to `nodelay'
tui.o: In function `setup_windows':
tui.c:(.text+0x131): undefined reference to `stdscr'
tui.c:(.text+0x176): undefined reference to `stdscr'
tui.c:(.text+0x19f): undefined reference to `stdscr'
tui.c:(.text+0x1cc): undefined reference to `stdscr'
tui.c:(.text+0x1ff): undefined reference to `stdscr'
tui.o:tui.c:(.text+0x229): more undefined references to `stdscr' follow
tui.o: In function `show_cooling_device':
[...]

stdscr() and friends are in libtinfo (part of ncurses) so add it to
the libraries that are linked in when compiling tmon to fix it.

Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
2014-07-01 09:55:40 +08:00
Michal Nazarewicz
f35f71244d tools: ffs-test: fix header values endianess
It appears that no one ever run ffs-test on a big-endian machine,
since it used cpu-endianess for fs_count and hs_count fields which
should be in little-endian format.  Fix by wrapping the numbers in
cpu_to_le32.

Cc: stable@vger.kernel.org
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2014-06-30 13:23:58 -05:00
Felipe Balbi
9ad7860450 Revert "tools: ffs-test: convert to new descriptor format fixing compilation error"
This reverts commit f2af74123f.

There is a better fix for this build error coming in a following
patch.

Signed-of-by: Felipe Balbi <balbi@ti.com>
2014-06-27 10:41:00 -05:00
Linus Torvalds
d91d66e88e Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Pull powerpc fixes and cleanups from Ben Herrenschmidt:
 "Here are a handful or two of powerpc fixes and simple/trivial
  cleanups.  A bunch of them fix ftrace with the new ABI v2 in Little
  Endian, the rest is a scattering of fairly simple things"

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc: Don't skip ePAPR spin-table CPUs
  powerpc/module: Fix TOC symbol CRC
  powerpc/powernv: Remove OPAL v1 takeover
  powerpc/kmemleak: Do not scan the DART table
  selftests/powerpc: Use the test harness for the TM DSCR test
  powerpc/cell: cbe_thermal.c: Cleaning up a variable is of the wrong type
  powerpc/kprobes: Fix jprobes on ABI v2 (LE)
  powerpc/ftrace: Use pr_fmt() to namespace error messages
  powerpc/ftrace: Fix nop of modules on 64bit LE (ABIv2)
  powerpc/ftrace: Fix inverted check of create_branch()
  powerpc/ftrace: Fix typo in mask of opcode
  powerpc: Add ppc_global_function_entry()
  powerpc/macintosh/smu.c: Fix closing brace followed by if
  powerpc: Remove __arch_swab*
  powerpc: Remove ancient DEBUG_SIG code
  powerpc/kerenl: Enable EEH for IO accessors
2014-06-25 05:44:17 -07:00
Greg Kroah-Hartman
135e7d0d4a usb: fixes for v3.16-rc2
dwc3-omap won't crash anymore on module removal and suspend/resume won't kill
 xHCI interrupts.
 
 MUSB got a fix to handle Babble condition only in host mode, how it should be.
 
 The f_fs function driver got a fix for a NULL pointer dereference.
 
 Renesas gadget got a fix for Status stage handling.
 
 Signed-of-by: Felipe Balbi <balbi@ti.com>
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Merge tag 'fixes-for-v3.16-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-linus

usb: fixes for v3.16-rc2

dwc3-omap won't crash anymore on module removal and suspend/resume won't kill
xHCI interrupts.

MUSB got a fix to handle Babble condition only in host mode, how it should be.

The f_fs function driver got a fix for a NULL pointer dereference.

Renesas gadget got a fix for Status stage handling.

Signed-of-by: Felipe Balbi <balbi@ti.com>
2014-06-24 09:58:58 -04:00
Michael Ellerman
aa83f3d897 selftests/powerpc: Use the test harness for the TM DSCR test
This gives us standardised success/failure output and also handles
killing the test if it runs forever (2 minutes).

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-06-24 14:29:41 +10:00
Michal Nazarewicz
f2af74123f tools: ffs-test: convert to new descriptor format fixing compilation error
Commit [ac8dde11: “usb: gadget: f_fs: Add flags to descriptors block”]
which introduced a new descriptor format for FunctionFS removed the
usb_functionfs_descs_head structure, which is still used by ffs-test.
tool.

Convert ffs-test by converting it to use the new header format.  For
testing kernels prior to 3.14 (when the new format was introduced) and
parsing of the legacy headers in the new kernels, provide a compilation
flag to make the tool use the old format.

Finally, include information as to when the legacy FunctionFS headers
format has been deprecated (which is also when the new one has been
introduced).

Reported-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2014-06-19 08:51:35 -05:00
Ingo Molnar
cf230918cd Merge branch 'perf/core' into perf/urgent, to pick up the latest fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-06-14 14:10:08 +02:00
Linus Torvalds
b7c8c1945c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Pull more powerpc updates from Ben Herrenschmidt:
 "Here are the remaining bits I was mentioning earlier.  Mostly bug
  fixes and new selftests from Michael (yay !).  He also removed the WSP
  platform and A2 core support which were dead before release, so less
  clutter.

  One little "feature" I snuck in is the doorbell IPI support for
  non-virtualized P8 which speeds up IPIs significantly between threads
  of a core"

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (34 commits)
  powerpc/book3s: Fix some ABIv2 issues in machine check code
  powerpc/book3s: Fix guest MC delivery mechanism to avoid soft lockups in guest.
  powerpc/book3s: Increment the mce counter during machine_check_early call.
  powerpc/book3s: Add stack overflow check in machine check handler.
  powerpc/book3s: Fix machine check handling for unhandled errors
  powerpc/eeh: Dump PE location code
  powerpc/powernv: Enable POWER8 doorbell IPIs
  powerpc/cpuidle: Only clear LPCR decrementer wakeup bit on fast sleep entry
  powerpc/powernv: Fix killed EEH event
  powerpc: fix typo 'CONFIG_PMAC'
  powerpc: fix typo 'CONFIG_PPC_CPU'
  powerpc/powernv: Don't escalate non-existing frozen PE
  powerpc/eeh: Report frozen parent PE prior to child PE
  powerpc/eeh: Clear frozen state for child PE
  powerpc/powernv: Reduce panic timeout from 180s to 10s
  powerpc/xmon: avoid format string leaking to printk
  selftests/powerpc: Add tests of PMU EBBs
  selftests/powerpc: Add support for skipping tests
  selftests/powerpc: Put the test in a separate process group
  selftests/powerpc: Fix instruction loop for ABIv2 (LE)
  ...
2014-06-12 20:11:38 -07:00
Linus Torvalds
3737a12761 Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull more perf updates from Ingo Molnar:
 "A second round of perf updates:

   - wide reaching kprobes sanitization and robustization, with the hope
     of fixing all 'probe this function crashes the kernel' bugs, by
     Masami Hiramatsu.

   - uprobes updates from Oleg Nesterov: tmpfs support, corner case
     fixes and robustization work.

   - perf tooling updates and fixes from Jiri Olsa, Namhyung Ki, Arnaldo
     et al:
        * Add support to accumulate hist periods (Namhyung Kim)
        * various fixes, refactorings and enhancements"

* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (101 commits)
  perf: Differentiate exec() and non-exec() comm events
  perf: Fix perf_event_comm() vs. exec() assumption
  uprobes/x86: Rename arch_uprobe->def to ->defparam, minor comment updates
  perf/documentation: Add description for conditional branch filter
  perf/x86: Add conditional branch filtering support
  perf/tool: Add conditional branch filter 'cond' to perf record
  perf: Add new conditional branch filter 'PERF_SAMPLE_BRANCH_COND'
  uprobes: Teach copy_insn() to support tmpfs
  uprobes: Shift ->readpage check from __copy_insn() to uprobe_register()
  perf/x86: Use common PMU interrupt disabled code
  perf/ARM: Use common PMU interrupt disabled code
  perf: Disable sampled events if no PMU interrupt
  perf: Fix use after free in perf_remove_from_context()
  perf tools: Fix 'make help' message error
  perf record: Fix poll return value propagation
  perf tools: Move elide bool into perf_hpp_fmt struct
  perf tools: Remove elide setup for SORT_MODE__MEMORY mode
  perf tools: Fix "==" into "=" in ui_browser__warning assignment
  perf tools: Allow overriding sysfs and proc finding with env var
  perf tools: Consider header files outside perf directory in tags target
  ...
2014-06-12 19:18:49 -07:00
Linus Torvalds
f9da455b93 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
Pull networking updates from David Miller:

 1) Seccomp BPF filters can now be JIT'd, from Alexei Starovoitov.

 2) Multiqueue support in xen-netback and xen-netfront, from Andrew J
    Benniston.

 3) Allow tweaking of aggregation settings in cdc_ncm driver, from Bjørn
    Mork.

 4) BPF now has a "random" opcode, from Chema Gonzalez.

 5) Add more BPF documentation and improve test framework, from Daniel
    Borkmann.

 6) Support TCP fastopen over ipv6, from Daniel Lee.

 7) Add software TSO helper functions and use them to support software
    TSO in mvneta and mv643xx_eth drivers.  From Ezequiel Garcia.

 8) Support software TSO in fec driver too, from Nimrod Andy.

 9) Add Broadcom SYSTEMPORT driver, from Florian Fainelli.

10) Handle broadcasts more gracefully over macvlan when there are large
    numbers of interfaces configured, from Herbert Xu.

11) Allow more control over fwmark used for non-socket based responses,
    from Lorenzo Colitti.

12) Do TCP congestion window limiting based upon measurements, from Neal
    Cardwell.

13) Support busy polling in SCTP, from Neal Horman.

14) Allow RSS key to be configured via ethtool, from Venkata Duvvuru.

15) Bridge promisc mode handling improvements from Vlad Yasevich.

16) Don't use inetpeer entries to implement ID generation any more, it
    performs poorly, from Eric Dumazet.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1522 commits)
  rtnetlink: fix userspace API breakage for iproute2 < v3.9.0
  tcp: fixing TLP's FIN recovery
  net: fec: Add software TSO support
  net: fec: Add Scatter/gather support
  net: fec: Increase buffer descriptor entry number
  net: fec: Factorize feature setting
  net: fec: Enable IP header hardware checksum
  net: fec: Factorize the .xmit transmit function
  bridge: fix compile error when compiling without IPv6 support
  bridge: fix smatch warning / potential null pointer dereference
  via-rhine: fix full-duplex with autoneg disable
  bnx2x: Enlarge the dorq threshold for VFs
  bnx2x: Check for UNDI in uncommon branch
  bnx2x: Fix 1G-baseT link
  bnx2x: Fix link for KR with swapped polarity lane
  sctp: Fix sk_ack_backlog wrap-around problem
  net/core: Add VF link state control policy
  net/fsl: xgmac_mdio is dependent on OF_MDIO
  net/fsl: Make xgmac_mdio read error message useful
  net_sched: drr: warn when qdisc is not work conserving
  ...
2014-06-12 14:27:40 -07:00
Jiri Olsa
45dc1bb5c1 perf tests: Add test for closing dso objects on EMFILE error
Testing that perf properly closes opened dso objects
and tries to reopen in case we run out of allowed file
descriptors for dso data.

Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Reviewed by: David Ahern <dsahern@gmail.com>
Link: http://lkml.kernel.org/r/1401892622-30848-14-git-send-email-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-12 16:53:23 +02:00
Jiri Olsa
4ebbcb84b1 perf tests: Add test for caching dso file descriptors
Adding test that setup test_dso_data__fd_limit and test
dso data file descriptors are cached appropriately.

Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1401892622-30848-13-git-send-email-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-12 16:53:22 +02:00
Jiri Olsa
822c45db63 perf tests: Allow reuse of test_file function
Making the test_file function to be reusable for
new tests coming in following patches.

Also changing the template name of temp files to
"/tmp/perf-test-XXXXXX" to easily identify & blame.

Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1401892622-30848-12-git-send-email-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-12 16:53:22 +02:00
Jiri Olsa
0d8a5faaf5 perf tests: Spawn child for each test
In upcoming tests we will setup process limits, which
might affect other tests. Spawning child for each test
to prevent this.

Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Reviewed-by: David Ahern <dsahern@gmail.com>
Link: http://lkml.kernel.org/r/1401892622-30848-11-git-send-email-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-12 16:53:22 +02:00
Jiri Olsa
c1f9aa0a61 perf tools: Add dso__data_* interface descriptons
Adding descriptions/explanations for dso__data_* interface
functions.

Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1401892622-30848-10-git-send-email-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-12 16:53:22 +02:00
Jiri Olsa
a08cae03f4 perf tools: Allow to close dso fd in case of open failure
Adding do_open function that tries to close opened
dso objects in case we fail to open the dso due to
to crossing the allowed RLIMIT_NOFILE limit.

Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1401892622-30848-9-git-send-email-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-12 16:53:21 +02:00
Jiri Olsa
c3fbd2a606 perf tools: Add file size check and factor dso__data_read_offset
Adding file size check, because the lseek will succeed for
any offset behind file size and thus succeed when it was
expected to fail.

Factoring the code to check the offset against file size
earlier in the flow.

Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1401892622-30848-8-git-send-email-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-12 16:53:21 +02:00
Jiri Olsa
c658045197 perf tools: Cache dso data file descriptor
Caching dso data file descriptors to avoid expensive re-opens
especially during DWARF unwind.

We keep dsos data file descriptors open until their count reaches
the half of the current fd open limit (RLIMIT_NOFILE). In this case
we close file descriptor of the first opened dso object.

We've got overall speedup (~27% for my workload) of report:
 'perf report --stdio -i perf-test.data' (3 runs)
  (perf-test.data size was around 12GB)

  current code:
   545,640,944,228      cycles                     ( +-  0.53% )
   785,255,798,320      instructions               ( +-  0.03% )

     366.340910010 seconds time elapsed            ( +-  3.65% )

  after change:
   435,895,036,114      cycles                     ( +-  0.26% )
   636,790,271,176      instructions               ( +-  0.04% )

     266.481463387 seconds time elapsed            ( +-  0.13% )

Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1401892622-30848-7-git-send-email-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-12 16:53:20 +02:00
Jiri Olsa
bda6ee4a94 perf tools: Add global count of opened dso objects
Adding global count of opened dso objects so we could
properly limit the number of opened dso data file
descriptors.

Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1401892622-30848-6-git-send-email-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-12 16:53:20 +02:00
Jiri Olsa
eba5102d2f perf tools: Add global list of opened dso objects
Adding global list of opened dso objects, so we can
track them and use the list for caching dso data file
descriptors.

Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1401892622-30848-5-git-send-email-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-12 16:53:20 +02:00
Jiri Olsa
53fa8eaa09 perf tools: Add data_fd into dso object
Adding data_fd into dso object so we could handle caching
of opened dso file data descriptors coming int next patches.

Adding dso__data_close interface to keep the data_fd updated
when the descriptor is closed.

Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1401892622-30848-4-git-send-email-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-12 16:53:19 +02:00
Jiri Olsa
ca40e2af1f perf tools: Separate dso data related variables
Add separated structure/namespace for data related
variables. We are going to add mode of them, so this
way they will be clearly separated.

Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1401892622-30848-3-git-send-email-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-12 16:53:19 +02:00
Jiri Olsa
0c4e774fad perf tools: Cache register accesses for unwind processing
Caching registers value into an array. Got about 4% speed up
of perf_reg_value function for report command processing
dwarf unwind stacks.

Output from report over 1.5 GB data with DWARF unwind stacks:
(TODO fix perf diff)

  current code:
   5.84%     perf  perf                       [.] perf_reg_value
  change:
   1.94%     perf  perf                       [.] perf_reg_value

And little bit of overall speed up:
(perf stat -r 5 -e '{cycles,instructions}:u' ...)

  current code:
   310,298,611,754      cycles                     ( +-  0.33% )
   439,669,689,341      instructions               ( +-  0.03% )

     188.656753166 seconds time elapsed            ( +-  0.82% )

  change:
   291,315,329,878      cycles                     ( +-  0.22% )
   391,763,485,304      instructions               ( +-  0.03%  )

     180.742249687 seconds time elapsed            ( +-  0.64% )

Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1401892622-30848-2-git-send-email-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-12 16:53:19 +02:00
Namhyung Kim
17314e2385 perf record: Fix to honor user freq/interval properly
When configuring event perf checked a wrong condition that user
specified both of freq (-F) and period (-c) or the event has no
default value.  This worked because most of events don't have default
value and only tracepoint events have default of 1 (and it's not
desirable to change it for those events).

However, Andi's downloadable event patch changes the situation so it
cannot change the value for those events.  Fix it by allowing override
the default value if user gives one of the options.

  $ perf record -a -e uops_retired.all -F 4000 sleep 1
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.325 MB perf.data (~14185 samples) ]

  $ perf evlist -F
  cpu/uops_retired.all/: sample_freq=4000

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/1402292617-26278-1-git-send-email-namhyung@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-12 16:53:18 +02:00
Ingo Molnar
7184062b94 perf/core improvements:
User visible:
 
 . Improve 'perf probe' error messages, moving some diagnostic messages to
   only appear in --verbose mode and fixing up some error reporting related
   to variables and struct members. (Masami Hiramatsu)
 
 . Reflow 'perf timechart' man page. (Stanislav Fomichev)
 
 Developer stuff:
 
 . Be more precise when reporting missing libraries in a static tool build.
   (Arnaldo Carvalho de Melo)
 
 . Show error messages from the multiple make invoked from 'make build-test'.
   (Arnaldo Carvalho de Melo)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements from Arnaldo Carvalho de Melo:

User visible:

  * Improve 'perf probe' error messages, moving some diagnostic messages to
    only appear in --verbose mode and fixing up some error reporting related
    to variables and struct members. (Masami Hiramatsu)

  * Reflow 'perf timechart' man page. (Stanislav Fomichev)

Developer stuff:

  * Be more precise when reporting missing libraries in a static tool build.
    (Arnaldo Carvalho de Melo)

  * Show error messages from the multiple make invoked from 'make build-test'.
    (Arnaldo Carvalho de Melo)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-06-12 13:54:42 +02:00
Michael Ellerman
3752e453f6 selftests/powerpc: Add tests of PMU EBBs
The Power8 Performance Monitor Unit (PMU) has a new feature called Event
Based Branches (EBB). This commit adds tests of the kernel API for using
EBBs.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-06-11 17:03:58 +10:00
Michael Ellerman
33b4819f3b selftests/powerpc: Add support for skipping tests
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-06-11 17:03:54 +10:00
Michael Ellerman
de506f73dd selftests/powerpc: Put the test in a separate process group
Allows us to kill the test and any children it has spawned.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-06-11 17:03:49 +10:00
Michael Ellerman
0a6121cf33 selftests/powerpc: Fix instruction loop for ABIv2 (LE)
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-06-11 17:03:45 +10:00
Sam bobroff
96d0161086 powerpc: Correct DSCR during TM context switch
Correct the DSCR SPR becoming temporarily corrupted if a task is
context switched during a transaction.

The problem occurs while suspending the task and is caused by saving
the DSCR to thread.dscr after it has already been set to the CPU's
default value:

__switch_to() calls __switch_to_tm()
	which calls tm_reclaim_task()
	which calls tm_reclaim_thread()
	which calls tm_reclaim()
		where the DSCR is set to the CPU's default
__switch_to() calls _switch()
		where thread.dscr is set to the DSCR

When the task is resumed, it's transaction will be doomed (as usual)
and the DSCR SPR will be corrupted, although the checkpointed value
will be correct. Therefore the DSCR will be immediately corrected by
the transaction aborting, unless it has been suspended. In that case
the incorrect value can be seen by the task until it resumes the
transaction.

The fix is to treat the DSCR similarly to the TAR and save it early
in __switch_to().

A program exposing the problem is added to the kernel self tests as:
tools/testing/selftests/powerpc/tm/tm-resched-dscr.

Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com>
CC: <stable@vger.kernel.org> [v3.10+]
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-06-11 17:02:56 +10:00
Linus Torvalds
c5aec4c76a Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Pull powerpc updates from Ben Herrenschmidt:
 "Here is the bulk of the powerpc changes for this merge window.  It got
  a bit delayed in part because I wasn't paying attention, and in part
  because I discovered I had a core PCI change without a PCI maintainer
  ack in it.  Bjorn eventually agreed it was ok to merge it though we'll
  probably improve it later and I didn't want to rebase to add his ack.

  There is going to be a bit more next week, essentially fixes that I
  still want to sort through and test.

  The biggest item this time is the support to build the ppc64 LE kernel
  with our new v2 ABI.  We previously supported v2 userspace but the
  kernel itself was a tougher nut to crack.  This is now sorted mostly
  thanks to Anton and Rusty.

  We also have a fairly big series from Cedric that add support for
  64-bit LE zImage boot wrapper.  This was made harder by the fact that
  traditionally our zImage wrapper was always 32-bit, but our new LE
  toolchains don't really support 32-bit anymore (it's somewhat there
  but not really "supported") so we didn't want to rely on it.  This
  meant more churn that just endian fixes.

  This brings some more LE bits as well, such as the ability to run in
  LE mode without a hypervisor (ie. under OPAL firmware) by doing the
  right OPAL call to reinitialize the CPU to take HV interrupts in the
  right mode and the usual pile of endian fixes.

  There's another series from Gavin adding EEH improvements (one day we
  *will* have a release with less than 20 EEH patches, I promise!).

  Another highlight is the support for the "Split core" functionality on
  P8 by Michael.  This allows a P8 core to be split into "sub cores" of
  4 threads which allows the subcores to run different guests under KVM
  (the HW still doesn't support a partition per thread).

  And then the usual misc bits and fixes ..."

[ Further delayed by gmail deciding that BenH is a dirty spammer.
  Google knows.  ]

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (155 commits)
  powerpc/powernv: Add missing include to LPC code
  selftests/powerpc: Test the THP bug we fixed in the previous commit
  powerpc/mm: Check paca psize is up to date for huge mappings
  powerpc/powernv: Pass buffer size to OPAL validate flash call
  powerpc/pseries: hcall functions are exported to modules, need _GLOBAL_TOC()
  powerpc: Exported functions __clear_user and copy_page use r2 so need _GLOBAL_TOC()
  powerpc/powernv: Set memory_block_size_bytes to 256MB
  powerpc: Allow ppc_md platform hook to override memory_block_size_bytes
  powerpc/powernv: Fix endian issues in memory error handling code
  powerpc/eeh: Skip eeh sysfs when eeh is disabled
  powerpc: 64bit sendfile is capped at 2GB
  powerpc/powernv: Provide debugfs access to the LPC bus via OPAL
  powerpc/serial: Use saner flags when creating legacy ports
  powerpc: Add cpu family documentation
  powerpc/xmon: Fix up xmon format strings
  powerpc/powernv: Add calls to support little endian host
  powerpc: Document sysfs DSCR interface
  powerpc: Fix regression of per-CPU DSCR setting
  powerpc: Split __SYSFS_SPRSETUP macro
  arch: powerpc/fadump: Cleaning up inconsistent NULL checks
  ...
2014-06-10 18:54:22 -07:00
Stanislav Fomichev
f48e00cead perf timechart: Reflow documentation
Move options away from examples.

Signed-off-by: Stanislav Fomichev <stfomichev@yandex-team.ru>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Ramkumar Ramachandra <artagnon@gmail.com>
Link: http://lkml.kernel.org/r/20140610095216.GO26511@stfomichev-desktop.yandex.net
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-06-10 10:03:18 -03:00
Masami Hiramatsu
5ee05b8801 perf probe: Improve error messages in --line option
Improve error messages of 'perf probe --line' mode.

Currently 'perf probe' shows the "Debuginfo analysis failed" message with
an error code when the given symbol is not found:

  -----
  # perf probe -L page_cgroup_init_flatmem
  Debuginfo analysis failed. (-2)
    Error: Failed to show lines.
  -----

But -2 (-ENOENT) means that the given source line or function was not
found. With this patch, 'perf probe' shows the correct error message:

  -----
  # perf probe -L page_cgroup_init_flatmem
  Specified source line is not found.
    Error: Failed to show lines.
  -----

There is also another debug error code is shown in the same function
after get_real_path(). This removes that too.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20140606071406.6788.47850.stgit@kbuild-fedora.novalocal
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-06-10 10:02:06 -03:00
Masami Hiramatsu
69e96eaa4f perf probe: Improve an error message of perf probe --vars mode
Fix an error message when failed to find given address in --vars
mode.

Without this fix, perf probe -V doesn't show the final "Error"
message if it fails to find given source line. Moreover, it
tells it fails to find "variables" instead of the source line.
  -----
  # perf probe -V foo@bar
  Failed to find variables at foo@bar (0)
  -----
The result also shows mysterious error code. Actually the error
returns 0 or -ENOENT means that it just fails to find the address
of given source line. (0 means there is no matching address,
and -ENOENT means there is an entry(DIE) but it has no instance,
e.g. an empty inlined function)

This fixes it to show what happened and the final error message
as below.
  -----
  # perf probe -V foo@bar
  Failed to find the address of foo@bar
    Error: Failed to show vars.
  -----

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20140606071359.6788.84716.stgit@kbuild-fedora.novalocal
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-06-09 14:35:58 -03:00
Masami Hiramatsu
b4bf1130cd perf probe: Show error code and description in verbose mode
Show error code and description only in verbose mode if 'perf probe'
command failed.

Current 'perf probe' shows error code with final error message, and that
is meaningless for many users.

This changes error messages to show the error code and its description
only in verbose mode (-v option).

Without this patch:
  -----
  # perf probe -a do_execve@hoge
  Probe point 'do_execve@hoge' not found.
    Error: Failed to add events. (-2)
  -----

With this patch, normally the message doesn't show the misterious error
number:
  -----
  # perf probe -a do_execve@hoge
  Probe point 'do_execve@hoge' not found.
    Error: Failed to add events.
  -----

And in verbose mode, it also shows additional error messages as below:
  -----
  # perf probe -va do_execve@hoge
  probe-definition(0): do_execve@hoge
  symbol:do_execve file:hoge line:0 offset:0 return:0 lazy:(null)
  0 arguments
  Looking at the vmlinux_path (6 entries long)
  Using /lib/modules/3.15.0-rc8+/build/vmlinux for symbols
  Open Debuginfo file: /lib/modules/3.15.0-rc8+/build/vmlinux
  Try to find probe point from debuginfo.
  Probe point 'do_execve@hoge' not found.
    Error: Failed to add events. Reason: No such file or directory (Code: -2)
  -----

Reported-by: Arnaldo Carvalho de Melo <acme@kernel.org>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20140606071352.6788.76943.stgit@kbuild-fedora.novalocal
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-06-09 14:34:09 -03:00
Masami Hiramatsu
36d789a4d7 perf probe: Improve error message for unknown member of data structure
Improve the error message if we can not find given member in the given
structure. Currently perf probe shows a wrong error message as below.

  -----
  # perf probe getname_flags:65 "result->BOGUS"
  result(type:filename) has no member BOGUS.
  Failed to find 'result' in this function.
    Error: Failed to add events. (-22)
  -----

The first message is correct, but the second one is not, since we didn't
fail to find a variable but fails to find the member of given variable.

  -----
  # perf probe getname_flags:65 "result->BOGUS"
  result(type:filename) has no member BOGUS.
    Error: Failed to add events. (-22)
  -----

With this patch, the error message shows only the first one.  And if we
really failed to find given variable, it tells us so.

  -----
  # perf probe getname_flags:65 "BOGUS"
  Failed to find 'BOGUS' in this function.
    Error: Failed to add events. (-2)
  -----

Reported-by: Arnaldo Carvalho de Melo <acme@kernel.org>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20140606071345.6788.23744.stgit@kbuild-fedora.novalocal
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-06-09 12:15:07 -03:00
Arnaldo Carvalho de Melo
a5c5009f72 perf tests: Show the inner make output when an error happens
Before:

  [acme@zoo linux]$ make -C tools/perf -f tests/make make_static
  make: Entering directory `/home/git/linux/tools/perf'
  - make_static: cd . && make -f Makefile DESTDIR=/tmp/tmp.JcWuM4Zu9f LDFLAGS=-static
  make: *** [make_static] Error 1
  make: Leaving directory `/home/git/linux/tools/perf'
  [acme@zoo linux]$

After:

  [acme@zoo linux]$ make -C tools/perf -f tests/make make_static
  make: Entering directory `/home/git/linux/tools/perf'
  - make_static: cd . && make -f Makefile DESTDIR=/tmp/tmp.X3su83i14u LDFLAGS=-static
  cd . && make -f Makefile DESTDIR=/tmp/tmp.X3su83i14u LDFLAGS=-static
    BUILD:   Doing 'make -j4' parallel build
  config/Makefile:303: *** No static glibc found, please install glibc-static.  Stop.
  make[1]: *** [all] Error 2
    test: test -x ./perf
  make: Leaving directory `/home/git/linux/tools/perf'
  [acme@zoo linux]$

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-h4kby5wyp6nfev3882rzm3r9@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-06-09 12:14:22 -03:00
Arnaldo Carvalho de Melo
f9ca2d8918 perf tools: Emit more precise message for missing glibc static library
When the user does:

  make -C tools/perf LDFLAGS=-static

asking for a static build, and the glibc-static (or equivalent) is not
found, the message wasn't clear, stating that one of glibc-devel or
glibc-static wasn't installed, clarify it checking if -static is
present in LDFLAGS.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-7e0sfobbzgeydzi9gsz8ss3m@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-06-09 12:14:08 -03:00
Don Zickus
9b32ba71ba perf tools: Add dcacheline sort
In perf's 'mem-mode', one can get access to a whole bunch of details specific to a
particular sample instruction.  A bunch of those details relate to the data
address.

One interesting thing you can do with data addresses is to convert them into a unique
cacheline they belong too.  Organizing these data cachelines into similar groups and sorting
them can reveal cache contention.

This patch creates an alogorithm based on various sample details that can help group
entries together into data cachelines and allows 'perf report' to sort on it.

The algorithm relies on having proper mmap2 support in the kernel to help determine
if the memory map the data address belongs to is private to a pid or globally shared.

The alogortithm is as follows:

o group cpumodes together
o group entries with discovered maps together
o sort on major, minor, inode and inode generation numbers
o if userspace anon, then sort on pid
o sort on cachelines based on data addresses

The 'dcacheline' sort option in 'perf report' only works in 'mem-mode'.

Sample output:

 #
 # Samples: 206  of event 'cpu/mem-loads/pp'
 # Total weight : 2534
 # Sort order   : dcacheline,pid
 #
 # Overhead       Samples                                                          Data Cacheline       Command:  Pid
 # ........  ............  ......................................................................  ..................
 #
    13.22%             1  [k] 0xffff88042f08ebc0                                                       swapper:    0
     9.27%             1  [k] 0xffff88082e8cea80                                                       swapper:    0
     3.59%             2  [k] 0xffffffff819ba180                                                       swapper:    0
     0.32%             1  [k] arch_trigger_all_cpu_backtrace_handler_na.23901+0xffffffffffffffe0       swapper:    0
     0.32%             1  [k] timekeeper_seq+0xfffffffffffffff8                                        swapper:    0

Note:  Added a '+1' to symlen size in hists__calc_col_len to prevent the next column
from prematurely tabbing over and mis-aligning.  Not sure what the problem is.

Signed-off-by: Don Zickus <dzickus@redhat.com>
Link: http://lkml.kernel.org/r/1401208087-181977-8-git-send-email-dzickus@redhat.com
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-09 13:34:49 +02:00
Don Zickus
2b1b71003e perf tools: Add support to dynamically get cacheline size
Different arches may have different cacheline sizes.  Look it up and set
a global variable for reference.

Signed-off-by: Don Zickus <dzickus@redhat.com>
Link: http://lkml.kernel.org/r/1401480605-97442-1-git-send-email-dzickus@redhat.com
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-09 13:34:48 +02:00
Don Zickus
7365be55ee perf tools: Add cpumode to struct hist_entry
The next patch needs to sort on cpumode, so add it to hist_entry to be tracked.

Signed-off-by: Don Zickus <dzickus@redhat.com>
Link: http://lkml.kernel.org/r/1401208087-181977-6-git-send-email-dzickus@redhat.com
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-06-09 13:34:48 +02:00