SHORT  L3 cache bandwidth in MBytes/s

EVENTSET
FIXC0 INSTR_RETIRED_ANY
FIXC1 CPU_CLK_UNHALTED_CORE
FIXC2 CPU_CLK_UNHALTED_REF
PMC0  L2_LINES_IN_ALL
PMC1  L2_TRANS_L2_WB
PMC2  IDI_MISC_WB_DOWNGRADE
PMC3  IDI_MISC_WB_UPGRADE


METRICS
Runtime (RDTSC) [s] time
Runtime unhalted [s] FIXC1*inverseClock
Clock [MHz]  1.E-06*(FIXC1/FIXC2)/inverseClock
CPI  FIXC1/FIXC0
L3 load bandwidth [MBytes/s]  1.0E-06*PMC0*64.0/time
L3 load data volume [GBytes]  1.0E-09*PMC0*64.0
L3 evict bandwidth [MBytes/s]  1.0E-06*PMC3*64.0/time
L3 evict data volume [GBytes]  1.0E-09*PMC3*64.0
L3|MEM evict bandwidth [MBytes/s]  1.0E-06*PMC1*64.0/time
L3|MEM evict data volume [GBytes]  1.0E-09*PMC1*64.0
Dropped CLs bandwidth [MBytes/s] 1.0E-6*PMC2*64.0/time
Dropped CLs data volume [GBytes] 1.0E-9*PMC2*64.0
L3 bandwidth [MBytes/s] 1.0E-06*(PMC0+PMC1)*64.0/time
L3 data volume [GBytes] 1.0E-09*(PMC0+PMC1)*64.0

LONG
Formulas:
L3 load bandwidth [MBytes/s] = 1.0E-06*L2_LINES_IN_ALL*64.0/time
L3 load data volume [GBytes] = 1.0E-09*L2_LINES_IN_ALL*64.0
L3 evict bandwidth [MBytes/s] = 1.0E-06*IDI_MISC_WB_UPGRADE*64.0/time
L3 evict data volume [GBytes] = 1.0E-09*IDI_MISC_WB_UPGRADE*64.0
Dropped CLs bandwidth [MBytes/s] = 1.0E-6*IDI_MISC_WB_DOWNGRADE*64.0/time
Dropped CLs data volume [GBytes] = 1.0E-9*IDI_MISC_WB_DOWNGRADE*64.0
L3|MEM evict bandwidth [MBytes/s] = 1.0E-06*L2_TRANS_L2_WB*64.0/time
L3|MEM evict data volume [GBytes] = 1.0E-09*L2_TRANS_L2_WB*64.0
L3 bandwidth [MBytes/s] = 1.0E-06*(L2_LINES_IN_ALL+L2_TRANS_L2_WB)*64/time
L3 data volume [GBytes] = 1.0E-09*(L2_LINES_IN_ALL+L2_TRANS_L2_WB)*64
--
Profiling group to measure L3 cache bandwidth and data volume. For Intel Skylake
or Cascadelake, the L3 is a victim cache. This means that all data is loaded
from memory directly into the L2 cache (if L3 prefetcher is inactive). Modified
data in L2 is evicted to L3 (additional data transfer due to non-inclusivenss of
L3 can be measured). Clean cache lines (only loaded data) might get dropped in
L2 to reduce traffic. If amount of clean cache lines is smaller than L3, it
might be evicted to L3 due to some heuristic.