linux-kernel - Re: [PATCH] perf test: Speed up test case 70 annotate basic tests

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Date: Fri, 7 Jun 2024 13:05:51 -0700
From: Namhyung Kim <namhyung@...nel.org>
To: Thomas Richter <tmricht@...ux.ibm.com>
Cc: linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
	acme@...nel.org, svens@...ux.ibm.com, gor@...ux.ibm.com,
	sumanthk@...ux.ibm.com, hca@...ux.ibm.com
Subject: Re: [PATCH] perf test: Speed up test case 70 annotate basic tests

On Fri, Jun 07, 2024 at 07:43:52AM +0200, Thomas Richter wrote:
> On some s390 linux machine (mostly older models) and with debug
> packages installed, the test case 'perf annotate basic tests' runs
> for some longer time.
> Speed up the test and save the output of command perf annotate
> in a temporary file. This is used to perform pattern matching via
> grep command. This saves on invocation of perf annotate which
> runs for some time.
> 
> Output before:
>  # time bash -x tests/shell/annotate.sh >/dev/null 2>&1; echo EXIT CODE $?
> 
>  real   4m35.543s
>  user   3m19.442s
>  sys    1m14.322s
>  EXIT CODE 0
>  #
> Output after:
>  # time bash -x tests/shell/annotate.sh >/dev/null 2>&1; echo EXIT CODE $?
> 
>  real   2m2.881s
>  user   1m30.980s
>  sys    0m30.684s
>  EXIT CODE 0
>  #

Oh.. it takes too long.  I think we should limit the output from
perf annotate in some way.  Anyway, the patch looks ok.

> 
> Signed-off-by: Thomas Richter <tmricht@...ux.ibm.com>

Acked-by: Namhyung Kim <namhyung@...nel.org>

Thanks,
Namhyung

> ---
>  tools/perf/tests/shell/annotate.sh | 10 +++++++---
>  1 file changed, 7 insertions(+), 3 deletions(-)
> 
> diff --git a/tools/perf/tests/shell/annotate.sh b/tools/perf/tests/shell/annotate.sh
> index 1db1e8113d99..b072d9b97387 100755
> --- a/tools/perf/tests/shell/annotate.sh
> +++ b/tools/perf/tests/shell/annotate.sh
> @@ -15,12 +15,13 @@ skip_test_missing_symbol ${testsym}
>  
>  err=0
>  perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
> +perfout=$(mktemp /tmp/__perf_test.perf.out.XXXXX)
>  testprog="perf test -w noploop"
>  # disassembly format: "percent : offset: instruction (operands ...)"
>  disasm_regex="[0-9]*\.[0-9]* *: *\w*: *\w*"
>  
>  cleanup() {
> -  rm -rf "${perfdata}"
> +  rm -rf "${perfdata}" "${perfout}"
>    rm -rf "${perfdata}".old
>  
>    trap - EXIT TERM INT
> @@ -41,8 +42,11 @@ test_basic() {
>      return
>    fi
>  
> +  # Generate the annotated output file
> +  perf annotate -i "${perfdata}" --stdio 2> /dev/null > "${perfout}"
> +
>    # check if it has the target symbol
> -  if ! perf annotate -i "${perfdata}" 2> /dev/null | grep "${testsym}"
> +  if ! grep "${testsym}" "${perfout}"
>    then
>      echo "Basic annotate [Failed: missing target symbol]"
>      err=1
> @@ -50,7 +54,7 @@ test_basic() {
>    fi
>  
>    # check if it has the disassembly lines
> -  if ! perf annotate -i "${perfdata}" 2> /dev/null | grep "${disasm_regex}"
> +  if ! grep "${disasm_regex}" "${perfout}"
>    then
>      echo "Basic annotate [Failed: missing disasm output from default disassembler]"
>      err=1
> -- 
> 2.45.1
>