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I am trying to measure QPI bandwidth on a dual socket Sandy Bridge E5-2670 SGI machine. Do the QPI counters work in PCM V2.3?
I use pcm.x to monitor the QPI output.
Here is the output sample, and you can see that QPI is either 0 or not a number.
Intel(r) QPI data traffic estimation in bytes (data traffic coming to CPU/socket through QPI links):
QPI0 QPI1 | QPI0 QPI1
----------------------------------------------------------------------------------------------
SKT 0 0 0 | -2147483648% -2147483648%
SKT 1 0 0 | -2147483648% -2147483648%
----------------------------------------------------------------------------------------------
Total QPI incoming data traffic: 0 QPI data traffic/Memory controller traffic: -nan
Intel(r) QPI traffic estimation in bytes (data and non-data traffic outgoing from CPU/socket through QPI links):
QPI0 QPI1 | QPI0 QPI1
----------------------------------------------------------------------------------------------
SKT 0 9223372 T 9223372 T | -2147483648% -2147483648%
SKT 1 9223372 T 9223372 T | -2147483648% -2147483648%
----------------------------------------------------------------------------------------------
Total QPI outgoing data and non-data traffic: 0
----------------------------------------------------------------------------------------------
SKT 0 package consumed 46.27 Joules
SKT 1 package consumed 44.40 Joules
----------------------------------------------------------------------------------------------
TOTAL: 90.72 Joules
----------------------------------------------------------------------------------------------
SKT 0 DIMMs consumed 6.45 Joules
SKT 1 DIMMs consumed 6.03 Joules
----------------------------------------------------------------------------------------------
TOTAL: 12.48 Joules
The pcm version is:
Intel(r) Performance Counter Monitor V2.3
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Roman Dementiev (Intel) wrote:Hi Roman, I did the following command and restart pcm tool rm –rf /dev/shm/sem.*Intel*PCM* but i got some error: ERROR: QPI LL counter programming seems not to work. Q_P0_PCI_PMON_BOX_CTL=0xffffffff Please see BIOS options to enable the export of performance monitoring devices. ERROR: QPI LL counter programming seems not to work. Q_P1_PCI_PMON_BOX_CTL=0xffffffff Please see BIOS options to enable the export of performance monitoring devices. ERROR: QPI LL counter programming seems not to work. Q_P0_PCI_PMON_BOX_CTL=0xffffffff Please see BIOS options to enable the export of performance monitoring devices. ERROR: QPI LL counter programming seems not to work. Q_P1_PCI_PMON_BOX_CTL=0xffffffff Please see BIOS options to enable the export of performance monitoring devices. Max QPI link speed: 16.0 GBytes/second (8.0 GT/second) I couldn't find any option to export the performance monitor, the mother board is Intel® Server Board S2600JF. Is it possible to enable it? Thanks, zhaoPCM always starts single instance. It could be that the other instance was killed/died unexpectedly not cleaning up the system instance counter properly. Stop all PCM instances and execute "rm -rf /dev/shm/sem.*Intel*PCM*" to clean up the instance counter.
Hope it helps,
Roman
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