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Hi,
I installed PCM 2.11 on an Ubuntu system with kernel 4.8.0. All PCM commands work fine except pcm-core.x. It complains that Access to Intel PCM had denied with "Unknown error". The message from pcm-core.x is listed below. I don't understand why all other PCM commands works fine except this one. Could someone help answer why and how to resolve the problem?
Thanks in advance,
Harry
====================
root@perf104:/home/tools/IntelPerformanceCounterMonitor-V2.11# ./pcm-core.x
Intel(r) Performance Counter Monitor: Core Monitoring Utility
Copyright (c) 2009-2016 Intel Corporation
Number of physical cores: 88
Number of logical cores: 88
Number of online logical cores: 88
Threads (logical cores) per physical core: 1
Num sockets: 4
Physical cores per socket: 22
Core PMU (perfmon) version: 3
Number of core PMU generic (programmable) counters: 8
Width of generic (programmable) counters: 48 bits
Number of core PMU fixed counters: 3
Width of fixed counters: 48 bits
Nominal core frequency: 2200000000 Hz
Package thermal spec power: 150 Watt; Package minimum power: 62 Watt; Package maximum power: 330 Watt;
Socket 0: 2 memory controllers detected with total number of 8 channels. 3 QPI ports detected.
Socket 1: 2 memory controllers detected with total number of 8 channels. 3 QPI ports detected.
Socket 2: 2 memory controllers detected with total number of 8 channels. 3 QPI ports detected.
Socket 3: 2 memory controllers detected with total number of 8 channels. 3 QPI ports detected.
Trying to use Linux perf events...
Linux Perf: Error on programming generic event #0 error: Invalid argument
Access to Intel(r) Performance Counter Monitor has denied (Unknown error).
Cleaning up
Freeing up all RMIDs
root@perf104:/home/tools/IntelPerformanceCounterMonitor-V2.11#
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This is an error from perf API of Linux kernel.
As a workaround you can disable using perf API in PCM Makefile. Comment out the line with "CXXFLAGS += -DPCM_USE_PERF" and recompile.
Thanks,
Roman
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This is an error from perf API of Linux kernel.
As a workaround you can disable using perf API in PCM Makefile. Comment out the line with "CXXFLAGS += -DPCM_USE_PERF" and recompile.
Thanks,
Roman
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Thanks Roman, the workaround works well.
I have a follow up question. With the same configuration, I am trying to collect CPU_CLK_UNHALTED.REF_TSC event with following command line, but all output values are 0. I tried another event, cpu/umask=0x01,event=0x3C,name=CPU_CLK_THREAD_UNHALTED.REF_XCLK_ANY,any=1/, and it works well. Did I miss anything here?
Thanks,
Harry
root@perf104:/home/tools/IntelPerformanceCounterMonitor-V2.11# ./pcm-core.x -e cpu/umask=0x03,event=0x00,name=CPU_CLK_UNHALTED.REF_TSC/ -e cpu/umask=0x01,event=0x3C,name=CPU_CLK_THREAD_UNHALTED.REF_XCLK/
Intel(r) Performance Counter Monitor: Core Monitoring Utility
Copyright (c) 2009-2016 Intel Corporation
Number of physical cores: 88
Number of logical cores: 88
Number of online logical cores: 88
Threads (logical cores) per physical core: 1
Num sockets: 4
Physical cores per socket: 22
Core PMU (perfmon) version: 3
Number of core PMU generic (programmable) counters: 8
Width of generic (programmable) counters: 48 bits
Number of core PMU fixed counters: 3
Width of fixed counters: 48 bits
Nominal core frequency: 2200000000 Hz
Package thermal spec power: 150 Watt; Package minimum power: 62 Watt; Package maximum power: 330 Watt;
Socket 0: 2 memory controllers detected with total number of 8 channels. 3 QPI ports detected.
Socket 1: 2 memory controllers detected with total number of 8 channels. 3 QPI ports detected.
Socket 2: 2 memory controllers detected with total number of 8 channels. 3 QPI ports detected.
Socket 3: 2 memory controllers detected with total number of 8 channels. 3 QPI ports detected.
1: cpu
2: umask=0x03,event=0x00,name=CPU_CLK_UNHALTED.REF_TSC
1: cpu
2: umask=0x01,event=0x3C,name=CPU_CLK_THREAD_UNHALTED.REF_XCLK
Socket 0
Max QPI link 0 speed: 19.2 GBytes/second (9.6 GT/second)
Max QPI link 1 speed: 19.2 GBytes/second (9.6 GT/second)
Max QPI link 2 speed: 19.2 GBytes/second (9.6 GT/second)
Socket 1
Max QPI link 0 speed: 19.2 GBytes/second (9.6 GT/second)
Max QPI link 1 speed: 19.2 GBytes/second (9.6 GT/second)
Max QPI link 2 speed: 19.2 GBytes/second (9.6 GT/second)
Socket 2
Max QPI link 0 speed: 19.2 GBytes/second (9.6 GT/second)
Max QPI link 1 speed: 19.2 GBytes/second (9.6 GT/second)
Max QPI link 2 speed: 19.2 GBytes/second (9.6 GT/second)
Socket 3
Max QPI link 0 speed: 19.2 GBytes/second (9.6 GT/second)
Max QPI link 1 speed: 19.2 GBytes/second (9.6 GT/second)
Max QPI link 2 speed: 19.2 GBytes/second (9.6 GT/second)
Detected Intel(R) Xeon(R) CPU E7-8880 v4 @ 2.20GHz "Intel(r) microarchitecture codename Broadwell-EP"
Update every 1.0 seconds
Time elapsed: 1004 ms
txn_rate: 1
Event0: CPU_CLK_UNHALTED.REF_TSC (raw 0x430300)
Event1: CPU_CLK_THREAD_UNHALTED.REF_XCLK (raw 0x43013c)
Core | IPC | Instructions | Cycles | Event0 | Event1 | Event2 | Event3
0 2.31 1207 M 523 M 0 26 M 0 0
1 0.31 223 K 727 K 0 60 K 0 0
2 0.44 142 K 320 K 0 26 K 0 0
3 0.42 100 K 242 K 0 20 K 0 0
4 0.36 173 K 476 K 0 39 K 0 0
5 0.40 156 K 395 K 0 32 K 0 0
6 0.52 102 K 198 K 0 16 K 0 0
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There is a technical detail: this event (0x00) is measured on the fixed PMU counter (unfortunately pcm-core does not recognize it yet). As a workaround you manually add printing getRefCycles value (similar to getCycles) in print_custom_stats function. getRefCycles returns CPU_CLK_UNHALTED.REF_TSC event count.
Thanks,
Roman
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