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MIPS: add support for software performance events

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Software events are required as part of the measurable stuff by the
Linux performance counter subsystem. Here is the list of events added by
this patch:
PERF_COUNT_SW_PAGE_FAULTS
PERF_COUNT_SW_PAGE_FAULTS_MIN
PERF_COUNT_SW_PAGE_FAULTS_MAJ
PERF_COUNT_SW_ALIGNMENT_FAULTS
PERF_COUNT_SW_EMULATION_FAULTS

Signed-off-by: Deng-Cheng Zhu <dengcheng.zhu@gmail.com>
To: linux-mips@linux-mips.org
Cc: a.p.zijlstra@chello.nl
Cc: paulus@samba.org
Cc: mingo@elte.hu
Cc: acme@redhat.com
Cc: jamie.iles@picochip.com
Acked-by: David Daney <ddaney@caviumnetworks.com>
Reviewed-by: Matt Fleming <matt@console-pimps.org>
Patchwork: https://patchwork.linux-mips.org/patch/1686/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Deng-Cheng Zhu
2010-10-12 19:37:21 +08:00
committed by Ralf Baechle
parent 6dbd972850
commit 7f788d2d53
5 changed files with 36 additions and 5 deletions
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11
arch/mips/mm/fault.c
View File

@ -18,6 +18,7 @@
#include <linux/smp.h>
#include <linux/module.h>
#include <linux/kprobes.h>
#include <linux/perf_event.h>
#include <asm/branch.h>
#include <asm/mmu_context.h>
@ -144,6 +145,7 @@ good_area:
* the fault.
*/
fault = handle_mm_fault(mm, vma, address, write ? FAULT_FLAG_WRITE : 0);
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, 0, regs, address);
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
goto out_of_memory;
@ -151,10 +153,15 @@ good_area:
goto do_sigbus;
BUG();
}
if (fault & VM_FAULT_MAJOR)
if (fault & VM_FAULT_MAJOR) {
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ,
1, 0, regs, address);
tsk->maj_flt++;
else
} else {
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN,
1, 0, regs, address);
tsk->min_flt++;
}
up_read(&mm->mmap_sem);
return;