linux-kernel - Re: [PATCH v5] perf test: Introduce script for data symbol testing

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Message-ID: <37feb67d-854c-e76e-1de9-256b7394ab09@amd.com>
Date:   Thu, 6 Oct 2022 17:04:10 +0530
From:   Ravi Bangoria <ravi.bangoria@....com>
To:     Leo Yan <leo.yan@...aro.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org
Cc:     Ravi Bangoria <ravi.bangoria@....com>
Subject: Re: [PATCH v5] perf test: Introduce script for data symbol testing

On 06-Oct-22 3:40 PM, Leo Yan wrote:
> This commit introduces a shell script for data symbol testing.
> 
> The testing is designed a data structure with 64-byte alignment, it has
> two fields "data1" and "data2", and other fields are reserved.
> 
> Using "perf mem" command, we can record and report memory samples for a
> self-contained workload with 1 second duration.  If have no any memory
> sample for the data structure "buf1", it reports failure;  and by
> checking the offset in structure "buf1", if any memory accessing is not
> for "data1" and "data2" fields, it means wrong data symbol parsing and
> returns failure.
> 
> Signed-off-by: Leo Yan <leo.yan@...aro.org>
> ---
> 
> Changes from v4:
> - Remove the redundant argument "--" before CPU list (Namhyung).
>   This patch is dependent on the fixing:
>   https://lore.kernel.org/lkml/20221004200211.1444521-1-namhyung@kernel.org/

Thanks Leo.
Test passes on my AMD machine (with AMD perf mem/c2c patches applied):

$ sudo ./perf test -v 103
103: Test data symbol                                                :
--- start ---
test child forked, pid 18048
Compiling test program...
Recording workload...
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 1.569 MB /tmp/__perf_test.perf.data.1bDdJ (3064 samples) ]
Cleaning up files...
test child finished with 0
---- end ----
Test data symbol: Ok