topic Re:VTune Profiler cannot recognize the processor in Analyzers

VTune Profiler cannot recognize the processor

Carles_O — Fri, 11 Nov 2022 00:19:07 GMT

Hi,

VTune installed in a remote Linux system. vtune-self-checker.sh seems to indicate that the SEP driver is loaded and functional (see attached log.txt).

Tune GUI running on MacOS and connecting via SSH to the remote Linux machine return the following errors:

x This analysis type is not applicable to the system because VTune Profiler cannot recognize the processor. If this is a new Intel processor, please check for an updated version of VTune Profiler. If this is an unreleased Intel processor, please contact Online Service Center for an NDA product package. x Cannot enable Hardware Event-based Sampling due to a problem with the driver (sep*/sepdrv*). Check that the driver is running and the driver group is in the current user group list. See the "Sampling Drivers" help topic for further details.

The processor in the remote machine is Intel(R) Xeon(R) Silver 4210 CPU @ 2.20GHz

Any help would be appreciated.

Cheers

Re: VTune Profiler cannot recognize the processor

Rahila_T_Intel — Fri, 11 Nov 2022 11:55:43 GMT

Hi,

Thank you for posting in Intel communities.

To Check the issue from our end could you please share the MacOS processor details?

We could see that you have mentioned like the processor in the remote machine is Intel(R) Xeon(R) Silver 4210 CPU @ 2.20GHz (Cascade Lake). But in the log file it is mentioned like skylake.

Could you please verify and confirm the same.

Thanks

Re: VTune Profiler cannot recognize the processor

Carles_O — Fri, 11 Nov 2022 18:25:14 GMT

Hi,

I've tried multiple systems with the same result, which is why you saw more than one target processor. Sorry for the confusion. For the purpose of this thread, we can focus on the Skylake use case.

The VTune GUI is running in a M1 machine.

--Carles

Re:VTune Profiler cannot recognize the processor

Rahila_T_Intel — Mon, 14 Nov 2022 08:58:22 GMT

Hi,

Could you please share the status of the loaded drivers.

You can check the status of the loaded drivers using the below command:

<oneapi_install_directory>/vtune/latest/sepdk/src/insmod-sep -q

example: /opt/intel/oneapi/vtune/latest/sepdk/src/insmod-sep -q

Thanks

Re: VTune Profiler cannot recognize the processor

Carles_O — Mon, 14 Nov 2022 20:21:11 GMT

See the output below.

>/opt/intel/oneapi/vtune/latest/sepdk/src/insmod-sep -q

pax driver is loaded and owned by group "vtune" with file permissions "660".
socperf3 driver is loaded and owned by group "vtune" with file permissions "660".
sep5 driver is loaded and owned by group "vtune" with file permissions "660".

socwatch driver is loaded and owned by group "vtune" with file permissions "660".

vtsspp driver is loaded and owned by group "vtune" with file permissions "660".

> groups
carlos_o vtune isotech shellbox_access

Re: VTune Profiler cannot recognize the processor

Carles_O — Mon, 14 Nov 2022 20:24:39 GMT

I'm including a screenshoot of the GUI in MacOS(M1) GUI for your reference

Re: VTune Profiler cannot recognize the processor

Carles_O — Wed, 16 Nov 2022 21:52:37 GMT

I have also run tune-gui from an Intel based Mac - Intel(R) Xeon(R) W-2150B CPU @ 3.00GHz - and the problem is the same.

Re:VTune Profiler cannot recognize the processor

Rahila_T_Intel — Fri, 18 Nov 2022 04:47:47 GMT

Hi,

We are working on this internally and will share you the updates.

Thanks

Re:VTune Profiler cannot recognize the processor

Rahila_T_Intel — Fri, 25 Nov 2022 10:13:56 GMT

Hi,

Could you please try the remote analysis without sep driver (unload it on the target machine)?

Thanks

Re:VTune Profiler cannot recognize the processor

Rahila_T_Intel — Fri, 02 Dec 2022 04:48:57 GMT

Hi,

We haven't heard back from you. Did you get time to try remote analysis without sep driver ?

Thanks

Re: Re:VTune Profiler cannot recognize the processor

Carles_O — Mon, 05 Dec 2022 19:31:01 GMT

Yes,

I'm running vtune cli in the remote machine then copying the resulting files to the GUI machine.

The issue is that I cannot see the application output in the "Application Output" window in the GUI.

Re: Re:VTune Profiler cannot recognize the processor

bariserkus — Sat, 10 Dec 2022 15:00:08 GMT

Hi, I have a similar problem, on a Ubuntu Machine. Could you please guide me with your solution? How do I unload the sep driver?

Re: Re:VTune Profiler cannot recognize the processor

bariserkus — Mon, 12 Dec 2022 06:04:40 GMT

Vtune Version 2022.4.1 has some major issues on my Ubuntu 20.04. Switching to Vtune 2022.2.0 worked smoothly. Maybe there are some bugs in the newer version of Vtune.

Re: VTune Profiler cannot recognize the processor

Rahila_T_Intel — Mon, 19 Dec 2022 10:08:58 GMT

Hi,

We have informed the concerned team regarding your issue.

Thanks for your patience.

Thanks

Re:VTune Profiler cannot recognize the processor

Rahila_T_Intel — Mon, 08 May 2023 10:46:45 GMT

Hi,

Sorry for the delay in response.

From your log we could see that:

"HW event-based analysis with stacks... Command line: /opt/intel/oneapi/vtune/2022.4.1/bin64/vtune -collect hotspots -knob sampling-mode=hw -knob enable-stack-collection=true -r /tmp/vtune-tmp-carlos_o/self-checker-2022.11.10_18.14.54/result_ah_with_stacks -data-limit 0 -finalization-mode none -source-search-dir /opt/intel/oneapi/vtune/2022.4.1/samples/en/C+/matrix/src – /opt/intel/oneapi/vtune/2022.4.1/samples/en/C+/matrix/matrix Stderr: vtune: Warning: Access to /proc/kallsyms file is limited.

Consider changing /proc/sys/kernel/kptr_restrict to 0 to enable resolution of OS kernel and kernel module symbols. vtune: Warning: To profile kernel modules during the session, make sure they are available in the /lib/modules/kernel_version/ location. vtune: Error: Insufficient limit for open file descriptors in the system for driverless collection.

To increase file descriptor limit,

1. Set a value above (150 * logic CPU count).

2. For the attach mode, check if /proc/sys/kernel/perf_event_paranoid is set to 0 or -1. If yes, multiply new limit by number of threads in the process.

3. Set hard and soft limits to new limit with 'nofile' value in /etc/security/limits.conf.

4. Refresh login to apply changes."

See the last bullet in https://www.intel.com/content/www/us/en/docs/vtune-profiler/user-guide/2023-0/hw-event-based-sampling-collection.html and https://www.intel.com/content/www/us/en/docs/vtune-profiler/user-guide/2023-0/microarchitecture-analysis-group.html or the Prerequisites in https://www.intel.com/content/www/us/en/docs/vtune-profiler/user-guide/2023-0/intel-xeon-phi-processor-knights-landing-targets.html

If this resolves your issue, make sure to accept this as a solution. This would help others with similar issue.

Thanks

Re:VTune Profiler cannot recognize the processor

Rahila_T_Intel — Mon, 15 May 2023 04:34:45 GMT

Hi,

We haven't heard back from you. Could you please give us an update?

Thanks

Re:VTune Profiler cannot recognize the processor

Rahila_T_Intel — Tue, 23 May 2023 09:12:16 GMT

Hi,

We have not heard back from you.

We assume that your issue is resolved. This thread will no longer be monitored by Intel. If you need further assistance, please post a new question.

Thanks

Re: Re:VTune Profiler cannot recognize the processor

Jeffrey_R_Intel1 — Thu, 01 Jun 2023 16:40:11 GMT

Hello,

To unload the SEP/PAX/VTSS drivers, use the rmmod-sep command from /opt/intel/oneapi/vtune/<version>/sepdk/src/rmmod-sep
(if vtune was installed as root, otherwise the path will start from your $HOME directory).

For additional details, see https://www.intel.com/content/www/us/en/docs/vtune-profiler/user-guide/2023-1/build-install-sampling-drivers-for-linux-targets.html