PAPI is not showing any counter in NVIDIA Xavier SoC for ARM Carmel CPU

[Alaul Monil]

Hi,

I am trying to make PAPI work on an NVIDIA SoC called Xavier and it has an ARM Carmel CPU. 

When I run papi_component_avail it was not showing any counter and was complaining about perf.

I found out perf is not installed. For example, if I run perf, it shows the following:

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..../rodinia_3.1/cuda/streamcluster# perf

WARNING: perf not found for kernel 4.9.140

  You may need to install the following packages for this specific kernel:

    linux-tools-4.9.140-tegra

    linux-cloud-tools-4.9.140-tegra

  You may also want to install one of the following packages to keep up to date:

    linux-tools-tegra

    linux-cloud-tools-tegra

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I could not find these kernel, so I downloaded the latest source code for Linux tools and built perf. Now I can see the output of perf list.

However, when I added perf on path, it is complaining about libpfm4 like below:

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..../papi/install/bin# ./papi_component_avail

Available components and hardware information.

PAPI version             : 5.7.1.0

Operating system         : Linux 4.9.140-tegra

Vendor string and code   : ARM (7, 0x7)

Model string and code    : ARMv8 Processor rev 0 (v8l) (0, 0x0)

CPU revision             : 0.000000

CPUID                    : Family/Model/Stepping 8/4/0, 0x08/0x04/0x00

CPU Max MHz              : 2265

CPU Min MHz              : 115

Total cores              : 8

SMT threads per core     : 1

Cores per socket         : 2

Sockets                  : 4

Cores per NUMA region    : 8

NUMA regions             : 0

Running in a VM          : no

Number Hardware Counters : 0

Max Multiplex Counters   : 384

Fast counter read (rdpmc): no

Compiled-in components:

Name:   perf_event              Linux perf_event CPU counters

   \-> Disabled: Unknown libpfm4 related error

Name:   perf_event_uncore       Linux perf_event CPU uncore and northbridge

   \-> Disabled: No uncore PMUs or events found

Active components:

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So, I downloaded libpfm4 from 

https://github.com/wcohen/libpfm4/blob/master/README

and built and installed it. But still, the error is there. 

Here is the info of my hardware and os:

root@xavier:/home/66m/rodinia_3.1/cuda/streamcluster# uname -a

Linux xavier 4.9.140-tegra #1 SMP PREEMPT Wed Mar 13 00:30:11 PDT 2019 aarch64 aarch64 aarch64 GNU/Linux

Do I need to enable any flag? or what am I missing?

Any help will be highly appreciated.

Thanks.

Monil

Intern at FTG, ORNL.

PhD Student,

University of Oregon.