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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2009-04-08 15:01:33 +0200
committerIngo Molnar <mingo@elte.hu>2009-04-08 19:05:56 +0200
commit78f13e9525ba777da25c4ddab89f28e9366a8b7c (patch)
treed23d43df02330f39e9c31901df9956d2e58a3474 /arch/powerpc/mm/fault.c
parent4d855457d84b819fefcd1cd1b0a2a0a0ec475c07 (diff)
downloadblackbird-obmc-linux-78f13e9525ba777da25c4ddab89f28e9366a8b7c.tar.gz
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perf_counter: allow for data addresses to be recorded
Paul suggested we allow for data addresses to be recorded along with the traditional IPs as power can provide these. For now, only the software pagefault events provide data addresses, but in the future power might as well for some events. x86 doesn't seem capable of providing this atm. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> LKML-Reference: <20090408130409.394816925@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/powerpc/mm/fault.c')
-rw-r--r--arch/powerpc/mm/fault.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index 17bbf6f91fbe..ac0e112031b2 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -171,7 +171,7 @@ 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);
+ perf_swcounter_event(PERF_COUNT_PAGE_FAULTS, 1, 0, regs, address);
/* When running in the kernel we expect faults to occur only to
* addresses in user space. All other faults represent errors in the
@@ -312,7 +312,8 @@ good_area:
}
if (ret & VM_FAULT_MAJOR) {
current->maj_flt++;
- perf_swcounter_event(PERF_COUNT_PAGE_FAULTS_MAJ, 1, 0, regs);
+ perf_swcounter_event(PERF_COUNT_PAGE_FAULTS_MAJ, 1, 0,
+ regs, address);
#ifdef CONFIG_PPC_SMLPAR
if (firmware_has_feature(FW_FEATURE_CMO)) {
preempt_disable();
@@ -322,7 +323,8 @@ good_area:
#endif
} else {
current->min_flt++;
- perf_swcounter_event(PERF_COUNT_PAGE_FAULTS_MIN, 1, 0, regs);
+ perf_swcounter_event(PERF_COUNT_PAGE_FAULTS_MIN, 1, 0,
+ regs, address);
}
up_read(&mm->mmap_sem);
return 0;
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