hi Mathieu

is this status still up to date? is there any changes in between

FYI: on gdb it is possible to trace multi-threaded programs on Intel processors using intel PT. I am not quite sure how this is realized, but I tested it and it works.

I am attaching the gdb test source file for it. it can be compiled using " gcc -g ./non-stop.c -o ./non-stop -lpthread"

start gdb using "gdb ./non-stop"

on gdb execute following commands

b main

run

break 27
break 30
thread apply all continue &
record btrace
thread apply all continue &

thread apply all info rec

info threads

set record instruction-history-size 256

thread apply 1 record goto 2
thread apply 2 record goto 4

thread apply 1 record instruction-history 1

thread apply 2 record instruction-history 1

you can see that gdb collects traces for both threads

Kind Regards

Zied Guermazi

On Monday, March 2, 2020, 4:23:10 PM GMT+1, Mathieu Poirier <mathieu.poirier@linaro.org> wrote:

Hi Andrea,

On Mon, 2 Mar 2020 at 01:46, Andrea Brunato <Andrea.Brunato@arm.com> wrote:
>
> Good morning,
>
> Is tracing a multi-threaded program a supported use case for perf cs-etm?

It is not a supported case for both PT and Coresight.

Mathieu

> If yes, are there any flags that should be specified with perf?
>
> Thanks,
> Andrea
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