[LTP] [PATCH 1/5] lib/tst_net: add generic tst_netload_compare()

[Petr Vorel <pvorel@suse.cz>]

Hi Alexey,

Reviewed-by: Petr Vorel <pvorel@suse.cz>

> * Remove duplicate code for comparing time-based results in
>   network tests (bbr, busy_poll, sctp, tcp fastopen, virt tests)

> * Expand thresholds for sctp, bbr test-cases, in order to avoid
>   false-positive failures.
I'm ok to keep more changes in single commit, but this change is affecting the
result, thus maybe put into separate commit?
(easier if somebody wants to bisect).

> * In virt_lib.sh, keep sign for VIRT_PERF_THRESHOLD.

> * TWARN when the base result is too bad (threshold_hi arg is set)

> Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com>
> ---
>  testcases/lib/tst_net.sh                      | 31 +++++++++++++++++++
>  testcases/network/busy_poll/busy_poll01.sh    | 10 ++----
>  testcases/network/busy_poll/busy_poll02.sh    |  8 +----
>  testcases/network/busy_poll/busy_poll03.sh    |  8 +----
>  testcases/network/dccp/dccp01.sh              | 15 ++-------
>  testcases/network/sctp/sctp01.sh              |  8 +----
>  testcases/network/tcp_cc/bbr01.sh             |  2 +-
>  testcases/network/tcp_cc/bbr02.sh             |  2 +-
>  testcases/network/tcp_cc/dctcp01.sh           |  2 +-
>  testcases/network/tcp_cc/tcp_cc_lib.sh        |  8 +----
>  .../network/tcp_fastopen/tcp_fastopen_run.sh  | 15 ++-------
>  testcases/network/virt/virt_lib.sh            | 21 ++-----------
>  12 files changed, 46 insertions(+), 84 deletions(-)

> diff --git a/testcases/lib/tst_net.sh b/testcases/lib/tst_net.sh
> index d939a5780..b29e076c3 100644
> --- a/testcases/lib/tst_net.sh
> +++ b/testcases/lib/tst_net.sh
> @@ -741,6 +741,37 @@ tst_netload()
>  	return $ret
>  }

> +# Compares results for netload runs.
> +# tst_netload_compare TIME_BASE TIME THRESHOLD_LOW [THRESHOLD_HI]
> +# TIME_BASE: time taken to run netstress load test - 100%
> +# TIME: time that is compared to the base one
> +# THRESHOD_LOW: lower limit for TFAIL
> +# THRESHOD_HIGH: upper limit for TWARN
> +tst_netload_compare()
> +{
> +	local base_time=$1
> +	local new_time=$2
> +	local threshold_low=$3
> +	local threshold_hi=$4
> +
> +	if [ -z "$base_time" -o -z "$new_time" -o -z "$threshold_low" ]; then
> +		tst_brk_ TBROK "tst_netload_compare: invalid argument(s)"
> +	fi
> +
> +	local res=$(((base_time - new_time) * 100 / base_time))
> +	local msg="performance result is ${res}%"
> +
> +	if [ "$res" -lt "$threshold_low" ]; then
> +		tst_res_ TFAIL "$msg < threshold ${threshold_low}%"
> +		return
> +	fi
> +
> +	[ "$threshold_hi" ] && [ "$res" -gt "$threshold_hi" ] && \
> +		tst_res_ TWARN "$msg > threshold ${threshold_hi}%"
> +
> +	tst_res_ TPASS "$msg, in range [${threshold_low}:${threshold_hi:-}]%"

Do you mean ${threshold_hi:--} (to print "-" when $threshold_hi not set?)
As ${threshold_hi:-} prints empty string when unset (equivalent of ${threshold_hi}).


> +}

...

Kind regards,
Petr