Re: [libevl][PATCH 4/4] evl-test: Add hectic for real-time stress

[Philippe Gerum <rpm@xenomai.org>]

Tobias Schaffner <tobias.schaffner@siemens.com> writes:

> The -r option allows to add realtime-stress by running hectic in the
> background while running the tests.
>
> Signed-off-by: Tobias Schaffner <tobias.schaffner@siemens.com>
> ---
>  utils/evl-test | 14 +++++++++++++-
>  1 file changed, 13 insertions(+), 1 deletion(-)
>
> diff --git a/utils/evl-test b/utils/evl-test
> index fb85f69..9a12d58 100644
> --- a/utils/evl-test
> +++ b/utils/evl-test
> @@ -12,6 +12,7 @@ full_path=false
>  unittests_only=false
>  load_cmd="dohell 900"
>  load_cmd_pgid_file="/tmp/evl_test_load_cmd_$$"
> +rt_load_pid=""
>  
>  usage() {
>     cat >&2 <<EOF
> @@ -19,7 +20,7 @@ evl test -h
>  
>  This help text.
>  
> -evl test [ -l "load command" ] [ -k ] [ -u ] [ --list ] [ --List ]
> +evl test [ -l "load command" ] [ -k ] [ -r ] [ -u ] [ --list ] [ --List ]
>  
>  Run a basic test/benchmark of evl on your platform, by first starting a
>  few unit tests, then running the latency test under the load generated by
> @@ -31,6 +32,10 @@ By default, the load command is "dohell 900", which will generate load during
>  This script accepts the -k option to tell the unit test loop to keep
>  going upon a failing test. Otherwise evl test stops immediately.
>  
> +If the script is passed the -r option, real-time stress is added to the test,
> +with the help of the "hectic" test. But beware: the latency test figures are
> +then no longer meaningful.
> +
>  Use -u if you want to skip the latency test and only run the unittests.
>  
>  Use --list to output all the tests available. --List will print all the tests
> @@ -67,6 +72,8 @@ while :; do
>            shift;;
>        -l) load_cmd="$2"
>            shift 2;;
> +      -r) rt_load=true;
> +          shift;;
>        -u) unittests_only=true
>            shift;;
>        --list) do_list=true
> @@ -113,6 +120,11 @@ if test ! -z "${load_cmd}"; then
>     setsid /bin/sh -c "${load_cmd} & echo \$\$ > ${load_cmd_pgid_file}"
>  fi
>  
> +if test x$rt_load = xtrue; then
> +   hectic > /dev/null 2>&1 &

hectic -s 200 is even more stressful.

-- 
Philippe.