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Somnath_M_
Beginner
108 Views

pcm-memory.x fails to read memory stats

Greetings,

I built and ran the PCM code on Ubuntu 16.04 PC with Intel Core i7-4810MQ running at 2.8GHz. "pcm.x" returns some memory stats but "pcm-memory.x" fails. How can I resolve the issue?

Output of pcm-memory.x:

$ sudo ./pcm-memory.x

 Processor Counter Monitor: Memory Bandwidth Monitoring Utility  ($Format:%ci ID=%h$)

 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: 3
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: 2800000000 Hz
Package thermal spec power: 47 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

 

Parts of pcm.x output:

$ sudo ./pcm.x 

 Processor Counter Monitor  ($Format:%ci ID=%h$)


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: 3
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: 2800000000 Hz
Package thermal spec power: 47 Watt; Package minimum power: 0 Watt; Package maximum power: 0 Watt; 

Detected Intel(R) Core(TM) i7-4810MQ CPU @ 2.80GHz "Intel(r) microarchitecture codename Haswell" stepping 3

<snip>
 Instructions retired:   27 M ; Active cycles:  124 M ; Time (TSC): 2794 Mticks ; C0 (active,non-halted) core residency: 0.59 %

 C1 core residency: 4.26 %; C3 core residency: 0.32 %; C6 core residency: 0.18 %; C7 core residency: 94.65 %;
 C2 package residency: 79.76 %; C3 package residency: 0.00 %; C6 package residency: 0.00 %; C7 package residency: 0.00 %;

 PHYSICAL CORE IPC                 : 0.45 => corresponds to 11.18 % utilization for cores in active state
 Instructions per nominal CPU cycle: 0.00 => corresponds to 0.06 % core utilization over time interval
---------------------------------------------------------------------------------------------------------------
MEM (GB)->|  READ |  WRITE |   IO   | CPU energy |
---------------------------------------------------------------------------------------------------------------
 SKT   0     0.64     0.07     0.50       8.39     
---------------------------------------------------------------------------------------------------------------

 

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Somnath_M_
Beginner
108 Views

My current understanding is that you have to rely on Integrated Memory Controller counters stated in https://software.intel.com/en-us/articles/monitoring-integrated-memory-controller-requests-in-the-2nd-3rd-and-4th-generation-intel . Those are reported by pcm.x.

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