PCM can't find second socket on system

Alexander_Alexeev — Fri, 07 Nov 2014 13:54:34 GMT

Hello

I faced a problem with PCM, it can't recognize second CPU available on the board and attribute all core to the single one.

Below is an output from PCM and after that from wmic

Briefly in reality there are two CPU E5-2680 with SMT disabled so 8 cores each and 16 totally. PCM in turn found single CPU with 16 cores.

What could be a source of the problem?

Thanks

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Intel(r) Performance Counter Monitor V2.7 (2014-09-10 12:12:32 +0200 ID=4ede607)

Number of physical cores: 16
Number of logical cores: 16
Number of online logical cores: 16
Threads (logical cores) per physical core: 1
Num sockets: 1
Physical cores per socket: 16
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: 2700000000 Hz
Package thermal spec power: 130 Watt; Package minimum power: 51 Watt; Package maximum power: 200 Watt;
PCM Warning: the bus for socket 0 on system with 1 sockets could not find via PCI bus scan. Using cpubusno reg1 memory controllers detected with total number of 4 channels.
Delay: 5
Using PCM on your system might have a performance impact as per http://software.intel.com/en-us/articles/perfos-on-snb-ep-with-vtune
You can avoid the performance impact by using the option --noJKTWA, however the cache metrics might be wrong

Detected Intel(R) Xeon(R) CPU E5-2680 0 @ 2.70GHz "Intel(r) microarchitecture codename Sandy Bridge-EP/Jaketow

DEBUG: caught signal to interrupt: Ctrl-C event
Cleaning up
Using PCM on your system might have a performance impact as per http://software.intel.com/en-us/articles/perfos-on-snb-ep-with-vtune
You can avoid the performance impact by using the option --noJKTWA, however the cache metrics might be wrong t
Zeroed PMU registers

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AddressWidth Architecture Availability Caption ConfigManagerErrorCode ConfigManagerUserConfig CpuStatus CreationClassName CurrentClockSpeed CurrentVoltage DataWidth Description DeviceID ErrorCleared ErrorDescription ExtClock Family InstallDate L2CacheSize L2CacheSpeed L3CacheSize L3CacheSpeed LastErrorCode Level LoadPercentage Manufacturer MaxClockSpeed Name NumberOfCores NumberOfLogicalProcessors OtherFamilyDescription PNPDeviceID PowerManagementCapabilities PowerManagementSupported ProcessorId ProcessorType Revision Role SocketDesignation Status StatusInfo Stepping SystemCreationClassName SystemName UniqueId UpgradeMethod Version VoltageCaps

64 9 3 Intel64 Family 6 Model 45 Stepping 7 1 Win32_Processor 2701 11 64 Intel64 Family 6 Model 45 Stepping 7 CPU0 100 179 2048 4096 0 6 2 GenuineIntel 2701 Intel(R) Xeon(R) CPU E5-2680 0 @ 2.70GHz 8 8 FALSE BFEBFBFF000206D7 3 11527 CPU CPU 1 OK 3 Win32_ComputerSystem spa 38

64 9 3 Intel64 Family 6 Model 45 Stepping 7 1 Win32_Processor 2701 11 64 Intel64 Family 6 Model 45 Stepping 7 CPU1 100 179 2048 4096 0 6 0 GenuineIntel 2701 Intel(R) Xeon(R) CPU E5-2680 0 @ 2.70GHz 8 8 FALSE BFEBFBFF000206D7 3 11527 CPU CPU 2 OK 3 Win32_ComputerSystem spa 38

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Alexander,

Roman_D_Intel — Fri, 07 Nov 2014 14:11:29 GMT

Alexander,

thanks for your report.

could you please attach /proc/cpuinfo from your system?

Thank you,

Roman

It is Windows system.

Alexander_Alexeev — Fri, 07 Nov 2014 14:42:16 GMT

It is Windows system.

What information I can provide then?

Hello Alexander,

Patrick_F_Intel1 — Fri, 07 Nov 2014 18:54:41 GMT

Hello Alexander,

Do you have NUMA disabled on the system?

Pat

Quote:Patrick Fay (Intel)

Alexander_Alexeev — Sat, 08 Nov 2014 20:51:53 GMT

Patrick Fay (Intel) wrote:

Do you have NUMA disabled on the system?

Yes

PCM uses code based on http:/

Patrick_F_Intel1 — Sun, 09 Nov 2014 03:32:07 GMT

PCM uses code based on http://msdn.microsoft.com/en-us/library/windows/desktop/ms683194%28v=vs.85%29.aspx to enumerate the nodes. Since you have numa disabled I'm assuming that pcm only sees 1 processor.

Can you check if after enabling numa then does PCM run okay?

Maybe we need to change PCM to look at processorPackageCount instead of numaNodeCount in the GetLogicalProcessorInformation() logic.

Pat

Quote:Patrick Fay (Intel)

Alexander_Alexeev — Mon, 10 Nov 2014 17:43:08 GMT

Patrick Fay (Intel) wrote:

Can you check if after enabling numa then does PCM run okay?

With NUMA enabled PCM shows two sockets.

Hi Alexander,

Roman_D_Intel — Fri, 28 Nov 2014 11:41:40 GMT

Hi Alexander,

thanks for reporting this. I will send you a patch for testing.

Thanks,

Roman

topic Hello Alexander, in Software Tuning, Performance Optimization & Platform Monitoring

PCM can't find second socket on system

Alexander,

It is Windows system.

Hello Alexander,

Quote:Patrick Fay (Intel)

PCM uses code based on http:/

Quote:Patrick Fay (Intel)

Hi Alexander,