diff options
| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-03-13 11:21:33 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-04-06 07:29:37 (GMT) |
| commit | 7dd1fcc258b65da718f01e4684a7b9244501a9fb (patch) | |
| tree | 4fb864f493b9f1d47bedbc3c97b9de7df572d6ec /arch | |
| parent | 15dbf27cc18559a14e99609f78678aa86b9c6ff1 (diff) | |
| download | linux-7dd1fcc258b65da718f01e4684a7b9244501a9fb.tar.xz | |
perf_counter: provide pagefault software events
We use the generic software counter infrastructure to provide
page fault events.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/mm/fault.c | 3 | ||||
| -rw-r--r-- | arch/x86/mm/fault.c | 3 |
2 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c index 7699394..eda5b0c 100644 --- a/arch/powerpc/mm/fault.c +++ b/arch/powerpc/mm/fault.c @@ -29,6 +29,7 @@ #include <linux/module.h> #include <linux/kprobes.h> #include <linux/kdebug.h> +#include <linux/perf_counter.h> #include <asm/firmware.h> #include <asm/page.h> @@ -170,6 +171,8 @@ int __kprobes do_page_fault(struct pt_regs *regs, unsigned long address, die("Weird page fault", regs, SIGSEGV); } + perf_swcounter_event(PERF_COUNT_PAGE_FAULTS, 1, 0, regs); + /* When running in the kernel we expect faults to occur only to * addresses in user space. All other faults represent errors in the * kernel and should generate an OOPS. Unfortunately, in the case of an diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index a03b727..c872575 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -27,6 +27,7 @@ #include <linux/tty.h> #include <linux/smp.h> #include <linux/mm.h> +#include <linux/perf_counter.h> #include <asm-generic/sections.h> @@ -1044,6 +1045,8 @@ do_page_fault(struct pt_regs *regs, unsigned long error_code) if (unlikely(error_code & PF_RSVD)) pgtable_bad(regs, error_code, address); + perf_swcounter_event(PERF_COUNT_PAGE_FAULTS, 1, 0, regs); + /* * If we're in an interrupt, have no user context or are running * in an atomic region then we must not take the fault: |