hi,
I was checking with SDM (September 2015) and I'd like if you
guys could help me with understanding of following array elements
I'm reffering to Table 18-19. Data Source Encoding for Load Latency Record
- element 5
SDM says:
05H L3 HIT. Local or Remote home requests that hit the L3 cache and was
serviced by another processor core with a cross core snoop where no modified
copies were found. (clean).
and we have L3 SNOOP MISS:
OP_LH | P(LVL, L3) | P(SNOOP, MISS), /* 0x05: L3 hit, snoop miss */
while the SDM indicates HIT
- element 6
SDM says:
L3 HIT. Local or Remote home requests that hit the L3 cache and was serviced
by another processor core with a cross core snoop where modified copies were
found. (HITM).
and we have L3 SNOOP HIT:
OP_LH | P(LVL, L3) | P(SNOOP, HIT), /* 0x06: L3 hit, snoop hit */
while the SDM indicates HITM
I'm probably misunderstanding SDM (wouldn't be the first time) what do I miss?
thanks for comments,
jirka
---
diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c
b/arch/x86/kernel/cpu/perf_event_intel_ds.c
index 5db1c7755548..000ab82d09e7 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_ds.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c
@@ -57,8 +57,8 @@ static const u64 pebs_data_source[] = {
OP_LH | P(LVL, LFB) | P(SNOOP, NONE), /* 0x02: LFB hit */
OP_LH | P(LVL, L2) | P(SNOOP, NONE), /* 0x03: L2 hit */
OP_LH | P(LVL, L3) | P(SNOOP, NONE), /* 0x04: L3 hit */
- OP_LH | P(LVL, L3) | P(SNOOP, MISS), /* 0x05: L3 hit, snoop miss */
- OP_LH | P(LVL, L3) | P(SNOOP, HIT), /* 0x06: L3 hit, snoop hit */
+ OP_LH | P(LVL, L3) | P(SNOOP, HIT), /* 0x05: L3 hit, snoop hit */
+ OP_LH | P(LVL, L3) | P(SNOOP, HITM), /* 0x06: L3 hit, snoop hitm */
OP_LH | P(LVL, L3) | P(SNOOP, HITM), /* 0x07: L3 hit, snoop hitm */
OP_LH | P(LVL, REM_CCE1) | P(SNOOP, HIT), /* 0x08: L3 miss snoop hit */
OP_LH | P(LVL, REM_CCE1) | P(SNOOP, HITM), /* 0x09: L3 miss snoop hitm*/
--
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