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xtensa: count software page fault perf events

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Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
Max Filippov 2015-06-04 13:42:22 +03:00
parent ae0b7139ab
commit af885de869
1 changed files with 7 additions and 0 deletions
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7
arch/xtensa/mm/fault.c
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@ -15,6 +15,7 @@
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/hardirq.h> #include <linux/hardirq.h>
#include <linux/perf_event.h>
#include <linux/uaccess.h> #include <linux/uaccess.h>
#include <asm/mmu_context.h> #include <asm/mmu_context.h>
#include <asm/cacheflush.h> #include <asm/cacheflush.h>
@ -142,6 +143,12 @@ good_area:
} }
up_read(&mm->mmap_sem); up_read(&mm->mmap_sem);
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
if (flags & VM_FAULT_MAJOR)
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, regs, address);
else if (flags & VM_FAULT_MINOR)
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, regs, address);
return; return;
/* Something tried to access memory that isn't in our memory map.. /* Something tried to access memory that isn't in our memory map..