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flo41215
Beginner
95 Views

Vtune 2019 update 2 - 'amplxe-cl -collect hpc-performance' return 0.0% of Effective CPU Utilization

Hello,

My Vtune installation issues suspicious behavior on skylake processors.

  • SEP driver informations :

Compilation command line :

# ./build-driver -pu -ni

Version :

Sampling Enabling Product version: 5.6  built on Jan 26 2019 19:14:20
SEP User Mode Version: 5.6
SEP Driver Version: 5.6
PAX Driver Version: 1.0
Platform type: 111
CPU name: Intel(R) Xeon(R) Processor code named Skylake
PMU: skylake_server
Driver configs: Non-Maskable Interrupt
Copyright(C) 2007-2018 Intel Corporation. All rights reserved.

 

  • amplxe-cl  output

# amplxe-cl -collect hpc-performance dd if=/dev/zero of=/dev/null count=1000000

[...]

Effective CPU Utilization: 0.0%
 | The metric value is low, which may signal a poor logical CPU cores
 | utilization caused by load imbalance, threading runtime overhead, contended
 | synchronization, or thread/process underutilization. Explore sub-metrics to
 | estimate the efficiency of MPI and OpenMP parallelism or run the Locks and
 | Waits analysis to identify parallel bottlenecks for other parallel runtimes.
 |
    Average Effective CPU Utilization: 0.000 out of 48

 

  • amplxe-self-checker output

# amplxe-self-checker.sh

[...]

HW event-based analysis check (Intel driver)
Example of analysis types: Hotspots with knob sampling-mode=hw, HPC Performance Characterization, etc.
    Collection: Ok
    Finalization: Ok
    Report: Fail
amplxe: Error: 0x40000024 (No data) -- No data is collected. Possible reasons:

HW event-based analysis check (Intel driver)
Example of analysis types: Microarchitecture Exploration
    Collection: Ok
    Finalization: Ok
    Report: Fail

HW event-based analysis with uncore events (Intel driver)
Example of analysis types: Memory Access
    Collection: Ok
    Finalization: Ok
    Report: Fail

 

Thank you

Florian

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1 Reply
flo41215
Beginner
95 Views

Same issue occur with vtune.2019.5.

After unloading sep driver some value is repported : Effective CPU Utilization: 86.4%

Anyone can help me ?

Thank you

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