Running VTune on remote machine creates errors

[Nikhil_T]

vtune: Error: amplxe-perf:

Using CPUID GenuineIntel-6-4F-1
Error:
No permission to enable CPU_CLK_UNHALTED.THREAD event.

You may not have permission to collect system-wide stats.

Consider tweaking /proc/sys/kernel/perf_event_paranoid,
which controls use of the performance events system by
unprivileged users (without CAP_SYS_ADMIN).

The current value is -1:

-1: Allow use of (almost) all events by all users
Ignore mlock limit after perf_event_mlock_kb without CAP_IPC_LOCK
>= 0: Disallow ftrace function tracepoint by users without CAP_SYS_ADMIN
Disallow raw tracepoint access by users without CAP_SYS_ADMIN
>= 1: Disallow CPU event access by users without CAP_SYS_ADMIN
>= 2: Disallow kernel profiling by users without CAP_SYS_ADMIN

To make this setting permanent, edit /etc/sysctl.conf too, e.g.:

kernel.perf_event_paranoid = -1

vtune: Error: Preliminary validation of the requested events failed.
aps Error: Cannot run the collection.

as you can see, the value is still -1 (most free access) but still generating this error. 

[JaideepK_Intel]

Hi,

Thank you for posting in Intel Analyzers Forum.

Could you please share the below information for better understanding of the issue and to debug it from our end:

1. VTune version
2. Log file after running self-checker Script self_check.py which will be available in <vtune-install-dir>/bin64

Also , this issue might be due to the sampling drivers. Please follow the below document to build and install sampling drivers and try again.

https://software.intel.com/content/www/us/en/develop/documentation/vtune-help/top/set-up-analysis-target/linux-targets/building-and-installing-the-sampling-drivers-for-linux-targets.html

Regards,

jaideep

[Nikhil_T]

VTune version : Intel(R) oneAPI VTune(TM) Profiler 2021.6.0 (build 618723) Command Line Tool

log output:

Intel(R) VTune(TM) Profiler Self Check Utility
Copyright (C) 2009-2020 Intel Corporation. All rights reserved.
Build Number: 618723

Ignored warnings: ['To profile kernel modules during the session, make sure they are available>
Check of files: Ok
================================================================================
Context values:
Command line:
/opt/intel/oneapi/vtune/2021.6.0/bin64/amplxe-runss --context-value-list
Stdout:
targetOS: Linux
OS: Linux
OSBuildNumber: 0
OSBitness: 64
RootPrivileges: true
isPtraceScopeLimited: false
isCATSupportedByCPU: true
isL3CATAvailable: true
L3CATDetails: COS=16;ways=20
isL2CATAvailable: false
isL3MonitoringSupportedByCPU: true
LLCSize: 36700160
cacheMonitoringUpscalingFactor: 57344
isL3CacheOccupancyAvailable: true
isL3TotalBWAvailable: true
isL3LocalBWAvailable: true
isTSXAvailable: true
isPTAvailable: true
isHTEnabled: true
fpgaOnBoard: None
omniPathOnBoard: None
genArchOnBoard: 0
pciClassParts:
isSGXAvailable: false

LinuxRelease: 5.4.0-65-generic
is3DXPPresent: false
is3DXP2LMMode: false
is3DXPAppDirectMode: false
IsNUMANodeWithoutCPUsPresent: false
Hypervisor: None
PerfmonVersion: 3
isMaxDRAMBandwidthMeasurementSupported: true
tidValuesForIO:
preferedGpuAdapter: none
isPtraceAvailable: true
i915Status: MissingDriver
isFtraceAvailable: ftraceAccessError,debugfsNotExists
isMdfEtwAvailable: false
isCSwitchAvailable: no
isGpuBusynessAvailable: unsupportedHardware
isGpuWaitAvailable: no
isFunctionTracingAvailable: no
isIowaitTracingAvailable: no
isVSyncAvailable: no
HypervisorType: None
isDeviceOrCredentialGuardEnabled: false
isSEPDriverAvailable: false
isPAXDriverLoaded: false
platformType: 108
CPU_NAME: Intel(R) Xeon(R) Processor code named Broadwell
PMU: broadwell_server
referenceFrequency: 2600000000
isPStateAvailable: true
isVTSSPPDriverAvailable: true
isNMIWatchDogTimerRunning: true
LinuxPerfCredentials: Unlimited
LinuxPerfCapabilities: breakpoint:raw;cpu:raw,format,events,ldlat;cstate_core:raw,format,eve>
LinuxPerfStackCapabilities: fp,dwarf,lbr

areKernelPtrsRestricted: no
LinuxPerfMuxIntervalMs: 4
isPerfPCIeMappingAvailable: false
isAOCLAvailable: true
isTPSSAvailable: true
isPytraceAvailable: true
forceShowInlines: false
isSTTAvailable: no
isEnergyCollectionSupported: true
isSocwatchDriverLoaded: false
isCPUSupportedBySocwatch: false
isIPMWatchReady: true
isNvdimmAvailable: true
isOsCountersCollectorAvailable: false
Getting context values: OK
================================================================================
Check driver:
isSEPDriverAvailable: false
isPAXDriverLoaded: false
Command line:
lsmod
Exception: [Errno 2] No such file or directory: 'lsmod': 'lsmod'

An unknown failure has occurred. Attempt the action again or contact Intel technical support.

Log location: /tmp/vtune-tmp-root/self-checker-2021.08.18_09.05.03/log.txt

[JaideepK_Intel]

Hi,

Looks like you have not installed sampling drivers. Please go through this link for installation:

https://software.intel.com/content/www/us/en/develop/documentation/vtune-help/top/set-up-analysis-target/linux-targets/building-and-installing-the-sampling-drivers-for-linux-targets.html

For installing lsmod:

apt-get install kmod

Regards,

jaideep

[JaideepK_Intel]

Hi,

I assume that your issue is resolved. If you need any additional information, please post a new question as this thread will no longer be monitored by Intel.

Thanks,

Jaideep