cc-metric-collector/collectors/likwid/groups/haswellEP/SBOX.txt

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2021-03-25 14:47:10 +01:00
SHORT Ring Transfer bandwidth
EVENTSET
FIXC0 INSTR_RETIRED_ANY
FIXC1 CPU_CLK_UNHALTED_CORE
FIXC2 CPU_CLK_UNHALTED_REF
SBOX0C0 RING_BL_USED_ANY
SBOX1C0 RING_BL_USED_ANY
SBOX2C0 RING_BL_USED_ANY
SBOX3C0 RING_BL_USED_ANY
METRICS
Runtime (RDTSC) [s] time
Runtime unhalted [s] FIXC1*inverseClock
Clock [MHz] 1.E-06*(FIXC1/FIXC2)/inverseClock
CPI FIXC1/FIXC0
Ring transfer bandwidth [MByte/s] 1.E-06*(SBOX0C0+SBOX1C0+SBOX2C0+SBOX3C0)*32/time
Ring transfer data volume [GByte] 1.E-09*(SBOX0C0+SBOX1C0+SBOX2C0+SBOX3C0)*32
LONG
Formulas:
Ring transfer bandwidth [MByte/s] = 1.E-06*(SUM(SBOXxC0)*32)/time
Ring transfer data volume [GByte] = 1.E-09*(SUM(SBOXxC0)*32)
--
The SBOXes manage the transfer between the socket local ring(s). For micro architectures
prior to Haswell, the SBOX and QBOX was similar as only a single ring was used.
Haswell systems with a high core count assemble two rings that are connected through
the SBOXes, the traffic between the sockets is handled by the QBOXes.