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powerpc/perf: Add Power8 mem_access event to sysfs 

Patch add "mem_access" event to sysfs. This as-is not a raw event
supported by Power8 pmu. Instead, it is formed based on
raw event encoding specificed in isa207-common.h.

Primary PMU event used here is PM_MRK_INST_CMPL.
This event tracks only the completed marked instructions.

Random sampling mode (MMCRA[SM]) with Random Instruction
Sampling (RIS) is enabled to mark type of instructions.

With Random sampling in RLS mode with PM_MRK_INST_CMPL event,
the LDST /DATA_SRC fields in SIER identifies the memory
hierarchy level (eg: L1, L2 etc) statisfied a data-cache
miss for a marked instruction.

Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Madhavan Srinivasan 2017-04-11 07:21:10 +05:30 committed by Michael Ellerman
parent d148c94c27
commit f2080b9ac3
2 changed files with 8 additions and 0 deletions
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6
arch/powerpc/perf/power8-events-list.h
View File

@ -89,3 +89,9 @@ EVENT(PM_MRK_FILT_MATCH, 0x2013c)
EVENT(PM_MRK_FILT_MATCH_ALT, 0x3012e)
/* Alternate event code for PM_LD_MISS_L1 */
EVENT(PM_LD_MISS_L1_ALT, 0x400f0)
/*
* Memory Access Event -- mem_access
* Primary PMU event used here is PM_MRK_INST_CMPL, along with
* Random Load/Store Facility Sampling (RIS) in Random sampling mode (MMCRA[SM]).
*/
EVENT(MEM_ACCESS, 0x10401e0)

2
arch/powerpc/perf/power8-pmu.c
View File

@ -90,6 +90,7 @@ GENERIC_EVENT_ATTR(branch-instructions, PM_BRU_FIN);
GENERIC_EVENT_ATTR(branch-misses, PM_BR_MPRED_CMPL);
GENERIC_EVENT_ATTR(cache-references, PM_LD_REF_L1);
GENERIC_EVENT_ATTR(cache-misses, PM_LD_MISS_L1);
GENERIC_EVENT_ATTR(mem_access, MEM_ACCESS);
CACHE_EVENT_ATTR(L1-dcache-load-misses, PM_LD_MISS_L1);
CACHE_EVENT_ATTR(L1-dcache-loads, PM_LD_REF_L1);
@ -120,6 +121,7 @@ static struct attribute *power8_events_attr[] = {
GENERIC_EVENT_PTR(PM_BR_MPRED_CMPL),
GENERIC_EVENT_PTR(PM_LD_REF_L1),
GENERIC_EVENT_PTR(PM_LD_MISS_L1),
GENERIC_EVENT_PTR(MEM_ACCESS),
CACHE_EVENT_PTR(PM_LD_MISS_L1),
CACHE_EVENT_PTR(PM_LD_REF_L1),