Thomas Gleixner fe17420784 perf session: Keep file mmaped instead of malloc/memcpy ... Profiling perf with perf revealed that a large part of the processing time is spent in malloc/memcpy/free in the sample ordering code. That code copies the data from the mmap into malloc'ed memory. That's silly. We can keep the mmap and just store the pointer in the queuing data structure. For 64 bit this is not a problem as we map the whole file anyway. On 32bit we keep 8 maps around and unmap the oldest before mmaping the next chunk of the file. Performance gain: 2.95s -> 1.23s (Faktor 2.4) Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20101130163820.278787719@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>		2010-11-30 20:01:08 -02:00
..
arch	Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-08-06 09:30:52 -07:00
bench	perf bench: Add feature that measures the performance of the arch/x86/lib/memcpy_64.S memcpy routines via 'perf bench mem'	2010-11-26 08:15:57 +01:00
Documentation	perf stat: Add no-aggregation mode to -a	2010-11-19 16:16:53 -02:00
scripts	perf trace scripting: remove system-wide param from shell scripts	2010-11-10 08:08:20 -06:00
util	perf session: Keep file mmaped instead of malloc/memcpy	2010-11-30 20:01:08 -02:00
.gitignore	perf tools: .gitignore += config.make config.make.autogen	2010-06-17 10:24:31 -03:00
builtin-annotate.c	perf tools: Add --tui and --stdio to choose the UI	2010-08-21 10:49:46 -03:00
builtin-bench.c	perf options: Type check all the remaining OPT_ variants	2010-05-17 16:22:41 -03:00
builtin-buildid-cache.c	perf buildid: add perfconfig option to specify buildid cache dir	2010-06-05 09:34:04 -03:00
builtin-buildid-list.c	perf tools: Remove unneeded code for tracking the cwd in perf sessions	2010-07-27 11:46:12 -03:00
builtin-diff.c	perf tools: Remove unneeded code for tracking the cwd in perf sessions	2010-07-27 11:46:12 -03:00
builtin-help.c	perf options: Type check all the remaining OPT_ variants	2010-05-17 16:22:41 -03:00
builtin-inject.c	perf inject: Add missing bits	2010-05-04 10:48:22 -03:00
builtin-kmem.c	perf: add perf-inject builtin	2010-05-02 13:36:56 -03:00
builtin-kvm.c	perf options: Type check all the remaining OPT_ variants	2010-05-17 16:22:41 -03:00
builtin-list.c	perf list: Fix large list output by using the pager	2009-08-13 09:05:48 +02:00
builtin-lock.c	perf options: Type check OPT_BOOLEAN and fix the offenders	2010-05-17 16:22:37 -03:00
builtin-probe.c	perf probe: Add basic module support	2010-10-21 16:11:44 -02:00
builtin-record.c	perf record: Add option to disable collecting build-ids	2010-11-26 19:39:15 -02:00
builtin-report.c	perf: Rename append_callchain into callchain_append	2010-08-22 20:43:51 +02:00
builtin-sched.c	perf: Use event__process_task from perf sched	2010-06-01 00:10:32 +02:00
builtin-stat.c	perf stat: Change and clean up sys_perf_event_open error handling	2010-11-20 13:04:15 -02:00
builtin-test.c	perf options: Type check OPT_BOOLEAN and fix the offenders	2010-05-17 16:22:37 -03:00
builtin-timechart.c	perf timechart: Adjust confusing if indentation	2010-08-05 19:38:02 -03:00
builtin-top.c	perf stat: Change and clean up sys_perf_event_open error handling	2010-11-20 13:04:15 -02:00
builtin-trace.c	perf trace: Handle DT_UNKNOWN on filesystems that don't support d_type	2010-11-27 01:33:04 -02:00
builtin.h	perf: add perf-inject builtin	2010-05-02 13:36:56 -03:00
command-list.txt	perf inject: Add missing bits	2010-05-04 10:48:22 -03:00
CREDITS	perf_counter tools: Add CREDITS file for Git contributors	2009-06-24 19:54:29 +02:00
design.txt	perf: Fix few typos + cosmetics	2010-01-13 17:39:44 +01:00
feature-tests.mak	perf tools: Remove hardcoded include paths for elfutils	2010-11-19 16:38:04 -02:00
Makefile	perf bench: Add feature that measures the performance of the arch/x86/lib/memcpy_64.S memcpy routines via 'perf bench mem'	2010-11-26 08:15:57 +01:00
MANIFEST	perf tools: Make target to generate self contained source tarball	2010-06-05 09:33:35 -03:00
perf-archive.sh	perf buildid: add perfconfig option to specify buildid cache dir	2010-06-05 09:34:04 -03:00
perf.c	perf buildid: add perfconfig option to specify buildid cache dir	2010-06-05 09:34:04 -03:00
perf.h	perf, MIPS: Support cross compiling of tools/perf for MIPS	2010-10-12 13:34:37 +02:00