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https://github.com/ClusterCockpit/cc-metric-collector.git
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44 lines
1.8 KiB
Plaintext
44 lines
1.8 KiB
Plaintext
SHORT Main memory bandwidth
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EVENTSET
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FIXC0 INSTR_RETIRED_ANY
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FIXC1 CPU_CLK_UNHALTED_CORE
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FIXC2 CPU_CLK_UNHALTED_REF
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WBOXFIX UNCORE_CLOCK
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MBOX0C0 FVC_EV0_BBOX_CMDS_READS
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MBOX0C1 DRAM_CMD_CAS_WR_OPN
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MBOX1C0 FVC_EV0_BBOX_CMDS_READS
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MBOX1C1 DRAM_CMD_CAS_WR_OPN
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METRICS
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Runtime (RDTSC) [s] time
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Runtime unhalted [s] FIXC1*inverseClock
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Clock [MHz] 1.E-06*(FIXC1/FIXC2)/inverseClock
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Uncore Clock [MHz] 1.E-06*(WBOXFIX)/time
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CPI FIXC1/FIXC0
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Memory read bandwidth [MBytes/s] 1.0E-06*(MBOX0C0+MBOX1C0)*64.0/time
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Memory read data volume [GBytes] 1.0E-09*(MBOX0C0+MBOX1C0)*64.0
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Memory write bandwidth [MBytes/s] 1.0E-06*(MBOX0C1+MBOX1C1)*64.0/time
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Memory write data volume [GBytes] 1.0E-09*(MBOX0C1+MBOX1C1)*64.0
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Memory bandwidth [MBytes/s] 1.0E-06*(MBOX0C0+MBOX1C0+MBOX0C1+MBOX1C1)*64/time
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Memory data volume [GBytes] 1.0E-09*(MBOX0C0+MBOX1C0+MBOX0C1+MBOX1C1)*64
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LONG
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Formulas:
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Uncore Clock [MHz] = 1.E-06*(UNCORE_CLOCK)/time
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Memory read bandwidth [MBytes/s] = 1.0E-06*(SUM(FVC_EV0_BBOX_CMDS_READS))*64.0/time
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Memory read data volume [GBytes] = 1.0E-09*(SUM(FVC_EV0_BBOX_CMDS_READS))*64.0
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Memory write bandwidth [MBytes/s] = 1.0E-06*(SUM(MDRAM_CMD_CAS_WR_OPN))*64.0/time
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Memory write data volume [GBytes] = 1.0E-09*(SUM(DRAM_CMD_CAS_WR_OPN))*64.0
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Memory bandwidth [MBytes/s] = 1.0E-06*(SUM(FVC_EV0_BBOX_CMDS_READS)+SUM(DRAM_CMD_CAS_WR_OPN))*64.0/time
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Memory data volume [GBytes] = 1.0E-09*(SUM(FVC_EV0_BBOX_CMDS_READS)+SUM(DRAM_CMD_CAS_WR_OPN))*64.0
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-
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Profiling group to measure memory bandwidth drawn by all cores of a socket.
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On Nehalem EX it is not possible to measure the write operations with the
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FVC_EV0_BBOX_CMDS_WRITES event at the same time as the FVC_EV0_BBOX_CMDS_READS
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because they set contrary bits. The DRAM_CMD_CAS_WR_OPN is an alternative but
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it only measures write operations to open pages, hence writes to closed pages
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are not included here.
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