mirror of
https://github.com/ClusterCockpit/cc-metric-collector.git
synced 2024-11-14 05:57:25 +01:00
26 lines
800 B
Plaintext
26 lines
800 B
Plaintext
|
SHORT False sharing
|
||
|
|
|
||
|
|
EVENTSET
|
||
|
|
FIXC0 INSTR_RETIRED_ANY
|
||
|
|
FIXC1 CPU_CLK_UNHALTED_CORE
|
||
|
|
FIXC2 CPU_CLK_UNHALTED_REF
|
||
|
|
PMC0 MEM_LOAD_L3_HIT_RETIRED_XSNP_HITM
|
||
|
|
PMC2 MEM_INST_RETIRED_ALL
|
||
|
|
|
||
|
|
METRICS
|
||
|
|
Runtime (RDTSC) [s] time
|
||
|
|
Runtime unhalted [s] FIXC1*inverseClock
|
||
|
|
Clock [MHz] 1.E-06*(FIXC1/FIXC2)/inverseClock
|
||
|
|
CPI FIXC1/FIXC0
|
||
|
|
Local LLC false sharing [MByte] 1.E-06*PMC0*64
|
||
|
|
Local LLC false sharing rate PMC0/PMC2
|
||
|
|
|
||
|
|
LONG
|
||
|
|
Formulas:
|
||
|
|
Local LLC false sharing [MByte] = 1.E-06*MEM_LOAD_L3_HIT_RETIRED_XSNP_HITM*64
|
||
|
|
Local LLC false sharing rate = MEM_LOAD_L3_HIT_RETIRED_XSNP_HITM/MEM_INST_RETIRED_ALL
|
||
|
|
-
|
||
|
|
False-sharing of cache lines can dramatically reduce the performance of an
|
||
|
|
application. This performance group measures the L3 traffic induced by false-sharing.
|
||
|
|
The false-sharing rate uses all memory loads as reference.
|