mirror of
https://github.com/ClusterCockpit/cc-metric-collector.git
synced 2024-11-14 05:57:25 +01:00
37 lines
1.6 KiB
Plaintext
37 lines
1.6 KiB
Plaintext
|
SHORT L2 cache bandwidth in MBytes/s
|
||
|
|
|
||
|
|
EVENTSET
|
||
|
|
FIXC0 INSTR_RETIRED_ANY
|
||
|
|
FIXC1 CPU_CLK_UNHALTED_CORE
|
||
|
|
FIXC2 CPU_CLK_UNHALTED_REF
|
||
|
|
PMC0 L2_REQUESTS_REFERENCE
|
||
|
|
PMC1:MATCH0=0x0002:MATCH1=0x1 OFFCORE_RESPONSE_0_OPTIONS
|
||
|
|
|
||
|
|
METRICS
|
||
|
|
Runtime (RDTSC) [s] time
|
||
|
|
Runtime unhalted [s] FIXC1*inverseClock
|
||
|
|
Clock [MHz] 1.E-06*(FIXC1/FIXC2)/inverseClock
|
||
|
|
CPI FIXC1/FIXC0
|
||
|
|
L2 non-RFO bandwidth [MBytes/s] 1.E-06*(PMC0)*64.0/time
|
||
|
|
L2 non-RFO data volume [GByte] 1.E-09*PMC0*64.0
|
||
|
|
L2 RFO bandwidth [MBytes/s] 1.E-06*(PMC1)*64.0/time
|
||
|
|
L2 RFO data volume [GByte] 1.E-09*(PMC1)*64.0
|
||
|
|
L2 bandwidth [MBytes/s] 1.E-06*(PMC0+PMC1)*64.0/time
|
||
|
|
L2 data volume [GByte] 1.E-09*(PMC0+PMC1)*64.0
|
||
|
|
|
||
|
|
LONG
|
||
|
|
Formulas:
|
||
|
|
L2 non-RFO bandwidth [MBytes/s] = 1.E-06*L2_REQUESTS_REFERENCE*64.0/time
|
||
|
|
L2 non-RFO data volume [GByte] = 1.E-09*L2_REQUESTS_REFERENCE*64.0
|
||
|
|
L2 RFO bandwidth [MBytes/s] = 1.E-06*(OFFCORE_RESPONSE_0_OPTIONS:MATCH0=0x0002:MATCH1=0x1)*64.0/time
|
||
|
|
L2 RFO data volume [GByte] = 1.E-09*(OFFCORE_RESPONSE_0_OPTIONS:MATCH0=0x0002:MATCH1=0x1)*64.0
|
||
|
|
L2 bandwidth [MBytes/s] = 1.E-06*(L2_REQUESTS_REFERENCE+OFFCORE_RESPONSE_0_OPTIONS:MATCH0=0x0002:MATCH1=0x1)*64.0/time
|
||
|
|
L2 data volume [GByte] = 1.E-09*(L2_REQUESTS_REFERENCE+OFFCORE_RESPONSE_0_OPTIONS:MATCH0=0x0002:MATCH1=0x1)*64.0
|
||
|
|
--
|
||
|
|
The L2 bandwidth and data volume does not contain RFOs (also called
|
||
|
|
write-allocates). The RFO bandwidth and data volume is only accurate when all
|
||
|
|
used data fits in the L2 cache. As soon as the data exceeds the L2 cache size,
|
||
|
|
the RFO metrics are too high.
|
||
|
|
Moreover, with increasing count of measured cores, the non-RFO metrics overcount
|
||
|
|
but commonly stay withing 10% error.
|