topic does pcm.x work for you? in Software Tuning, Performance Optimization & Platform Monitoring

Access to Processor Counter Monitor has denied with pcm-memory.x

lai_z_ — Fri, 31 Aug 2018 10:43:15 GMT

I built and ran the pcm-memory.x tool on CentOS 7 with Intel Xeon E3-1230 V5,but display as follows:

[root@localhost pcm-master]# ./pcm-memory.x

Processor Counter Monitor: Memory Bandwidth Monitoring Utility (2018-07-17 12:46:01 +0200 ID=e9b093b)

This utility measures memory bandwidth per channel or per DIMM rank in real-time

Number of physical cores: 4

Number of logical cores: 8

Number of online logical cores: 8

Threads (logical cores) per physical core: 2

Num sockets: 1

Physical cores per socket: 4

Core PMU (perfmon) version: 4

Number of core PMU generic (programmable) counters: 4

Width of generic (programmable) counters: 48 bits

Number of core PMU fixed counters: 3

Width of fixed counters: 48 bits

Nominal core frequency: 3400000000 Hz

Package thermal spec power: 80 Watt; Package minimum power: 0 Watt; Package maximum power: 0 Watt;

Access to Processor Counter Monitor has denied (no MSR or PCI CFG space access).

Cleaning up

[root@localhost pcm-master]#

Whether the pcm-memory.x tool not support the skylake CPU or I need to change some parameters?

does pcm.x work for you?

Roman_D_Intel — Mon, 03 Sep 2018 08:35:04 GMT

does pcm.x work for you?

could you please share strace output?

strace -f -o pcm-memory.strace.out ./pcm-memory.x

Hi,Roman,

lai_z_ — Tue, 04 Sep 2018 02:16:33 GMT

Hi,Roman,

I can run the pcm.x tool when I disabled the NMI_watchdog,and I typed 'strace -f -o pcm-memory.strace.out ./pcm-memory.x' at the command

line,the output is the same as running ./pcm-memory.x command.The output is as follows:

[root@localhost pcm-master]# strace -f -o pcm-memory.strace.out ./pcm-memory.x

Processor Counter Monitor: Memory Bandwidth Monitoring Utility (2018-07-17 12:46:01 +0200 ID=e9b093b)

This utility measures memory bandwidth per channel or per DIMM rank in real-time

Number of physical cores: 4

Number of logical cores: 8

Number of online logical cores: 8

Threads (logical cores) per physical core: 2

Num sockets: 1

Physical cores per socket: 4

Core PMU (perfmon) version: 4

Number of core PMU generic (programmable) counters: 4

Width of generic (programmable) counters: 48 bits

Number of core PMU fixed counters: 3

Width of fixed counters: 48 bits

Nominal core frequency: 3400000000 Hz

Package thermal spec power: 80 Watt; Package minimum power: 0 Watt; Package maximum power: 0 Watt;

Access to Processor Counter Monitor has denied (no MSR or PCI CFG space access).

Cleaning up

[root@localhost pcm-master]#

could you please attach the

Roman_D_Intel — Tue, 04 Sep 2018 07:18:50 GMT

could you please attach the pcm-memory.strace.out file produced by strace?

Hi,Roman,

lai_z_ — Tue, 04 Sep 2018 08:01:30 GMT

Hi,Roman,

The attach file is a file generated by strace.

thanks! Could you please also

Roman_D_Intel — Tue, 04 Sep 2018 11:34:03 GMT

thanks! Could you please also send me the content of /proc/cpuinfo file?

Hi,Roman,

lai_z_ — Wed, 05 Sep 2018 02:02:24 GMT

Hi,Roman,

The attachment is the cpuinfo file.

thank you. Unfortunately your

Roman_D_Intel — Wed, 05 Sep 2018 12:31:56 GMT

thank you. Unfortunately your processor does not have the hardware PMU unit that pcm-memory requires. pcm.x supports memory traffic metric as a replacement. PCM-memory will be updated to print this information.

Best regards,

Roman

Hi,Roman,

lai_z_ — Thu, 06 Sep 2018 01:58:39 GMT

Hi,Roman,

Thanks for your reply,can you tell me which models of E3 series CPU have the hardware PMU unit?

As far as I know only E5 and

Roman_D_Intel — Thu, 06 Sep 2018 07:34:45 GMT

As far as I know only E5 and E7 series from that CPU generation have this unit

Hi,Roman,

lai_z_ — Fri, 07 Sep 2018 03:41:38 GMT

Hi,Roman,

I found the release notes for version 2.10 of the PCM tool on this page: https://software.intel.com/en-us/articles/intel-performance-counter-monitor/ ,details are as follows:

Support Memory Bandwidth Monitoring technology (new local and remote memory bandwidth reported per (logical) core in pcm.x/exe)
Added support of Broadwell-based Intel®Xeon®E3 series
Added support of processor models based on archtitecture code-named Skylake U/Y.
New option for pcm (-yescores to enable specific core output)
Bug fixes

How to monitor memory bandwidth with the pcm.x/exe? What are the features that support Broadwell-based Intel®Xeon®E3 series?Whether Haswell and Ivy Bridge E3 series can be supported?

in pcm.x/exe you can find

Roman_D_Intel — Fri, 07 Sep 2018 07:13:14 GMT

in pcm.x/exe you can find metrics called "READ" and "WRITE":

READ : bytes read from main memory controller (in GBytes)

WRITE : bytes written to main memory controller (in GBytes)

sample output:

---------------------------------------------------------------------------------------------------------------
MEM (GB)->|  READ |  WRITE |   IO   | CPU energy |
---------------------------------------------------------------------------------------------------------------
 SKT   0     5.07     0.41     1.10      13.38
---------------------------------------------------------------------------------------------------------------