perf with OpenCSD on i.MX 8MM

[kanimozhi_t]

Hi,

    We've successfully added CoreSight components to the i.MX 8MM board and can record the trace with the following command:

perf record -e cs_etm/@tmc_etr0/u --per-thread -- /bin/ls

    However when we try to view the trace data, we get the following error:

$ perf report -D -i perf.data --stdio
0x178 [0x148]: event: 70
.
. ... raw event: size 328 bytes
................
. 00b0: cc178 [0x148]: failed to process type: 70 [Operation not permitted]
Error:
failed to process sample

    When we referred this message in OpenCSD documentation we found that this is caused by "a perf tool which is not using OpenCSD library"

So, we would like to know,

1. How to integrate OpenCSD library with perf tool on Yocto?
2. Is opencsd backported to Yocto zeus?
3. Why perf.bb in /yocto/zeus/sources/poky/meta/recipes-kernel/perf/perf.bb is void of CoreSight option?

NOTE: Adding IMAGE_INSTALL_append = " opencsd" gives the following error (Nothing RPROVIDES 'opencsd').

Parsing recipes: 100% |########################################| Time: 0:00:50
ERROR: Nothing RPROVIDES 'opencsd' (but /yocto/zeus/sources/poky/meta/recipes-core/images/core-image-base.bb RDEPENDS on or otherwise requires it)
ERROR: Required build target 'core-image-base' has no buildable providers.
Missing or unbuildable dependency chain was: ['core-image-base', 'opencsd']

[igorpadykov]

Hi kanimozhi_t

one can look at OpenCSD documentation

https://github.com/Linaro/OpenCSD

https://github.com/Linaro/OpenCSD/blob/master/HOWTO.md

for yocto issue may be posted on meta-fsl-arm mailing list

https://lists.yoctoproject.org/g/meta-freescale

Best regards
igor

[kanimozhi_t]

Hi @igorpadykov 

Thanks for replying.

I've posted in meta-fsl mailing list as suggested - perf with OpenCSD on Yocto Zeus - meta-freescale and waiting for a reply there.

In the meantime, I would like to get your views on the following questions:

1. Is the OpenCSD for perf backported to Zeus branch yet?
2. Is OpenCSD known to work on i.MX 8MM EVK with yocto Zeus?
3. Do you have the steps to be followed for manual build of perf with openCSD?
4. Where can I get the perf source code for i.MX 8M Mini EVK?

[igorpadykov]

Hi Kanimozhi

for supported features one can look at nxp official linux documentation

https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applicat...

Best regards
igor

[LBr]

Veeeery unhelpful