perf tests: Make "test data symbol" more robust on Neoverse N1

To prevent anyone from seeing a test failure appear as a regression and
thinking that it was caused by their code change, insert some noise into
the loop which makes it immune to sampling bias issues (errata 1694299).

The "test data symbol" test can fail with any unrelated change that
shifts the loop into an unfortunate position in the Perf binary which is
almost impossible to debug as the root cause of the test failure.
Ultimately it's caused by the referenced errata.

Fixes: 60abedb8aa902b06 ("perf test: Introduce script for data symbol testing")
Reviewed-by: Ian Rogers <[email protected]>
Signed-off-by: James Clark <[email protected]>
Acked-by: Namhyung Kim <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Athira Rajeev <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Leo Yan <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Spoorthy S <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

0 files changed, 0 insertions, 0 deletions