linux-kernel - Re: [PATCH] selftests/resctrl: Change a few printed messages

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Date:   Wed, 7 Apr 2021 08:33:23 -0600
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     Fenghua Yu <fenghua.yu@...el.com>, Shuah Khan <shuah@...nel.org>,
        Ravi V Shankar <ravi.v.shankar@...el.com>
Cc:     linux-kselftest <linux-kselftest@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH] selftests/resctrl: Change a few printed messages

On 4/5/21 6:52 PM, Fenghua Yu wrote:
> A few printed messages contain pass/fail strings which should be shown
> in test results. Remove the pass/fail strings in the messages to avoid
> confusion.
> 
> Add "\n" at the end of one printed message.
> 
> Suggested-by: Shuah Khan <shuah@...nel.org>
> Signed-off-by: Fenghua Yu <fenghua.yu@...el.com>
> ---
> This is a follow-up patch of recent resctrl selftest patches and can be
> applied cleanly to:
> git git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git
> branch next.
> 
>   tools/testing/selftests/resctrl/cache.c     | 3 +--
>   tools/testing/selftests/resctrl/mba_test.c  | 9 +++------
>   tools/testing/selftests/resctrl/mbm_test.c  | 3 +--
>   tools/testing/selftests/resctrl/resctrlfs.c | 7 ++-----
>   4 files changed, 7 insertions(+), 15 deletions(-)
> 
> diff --git a/tools/testing/selftests/resctrl/cache.c b/tools/testing/selftests/resctrl/cache.c
> index 362e3a418caa..310bbc997c60 100644
> --- a/tools/testing/selftests/resctrl/cache.c
> +++ b/tools/testing/selftests/resctrl/cache.c
> @@ -301,8 +301,7 @@ int show_cache_info(unsigned long sum_llc_val, int no_of_bits,
>   	ret = platform && abs((int)diff_percent) > max_diff_percent &&
>   	      (cmt ? (abs(avg_diff) > max_diff) : true);
>   
> -	ksft_print_msg("%s cache miss rate within %d%%\n",
> -		       ret ? "Fail:" : "Pass:", max_diff_percent);
> +	ksft_print_msg("Check cache miss rate within %d%%\n", max_diff_percent);

You need %s and pass in the ret ? "Fail:" : "Pass:" result for the
message to read correctly.

I am seeing:

# Check kernel support for resctrl filesystem

It should say the following:

# Fail Check kernel support for resctrl filesystem


Same for other such messages.
>   
>   	ksft_print_msg("Percent diff=%d\n", abs((int)diff_percent));
>   	ksft_print_msg("Number of bits: %d\n", no_of_bits);
> diff --git a/tools/testing/selftests/resctrl/mba_test.c b/tools/testing/selftests/resctrl/mba_test.c
> index 26f12ad4c663..a909a745754f 100644
> --- a/tools/testing/selftests/resctrl/mba_test.c
> +++ b/tools/testing/selftests/resctrl/mba_test.c
> @@ -80,9 +80,7 @@ static void show_mba_info(unsigned long *bw_imc, unsigned long *bw_resc)
>   		avg_diff = (float)labs(avg_bw_resc - avg_bw_imc) / avg_bw_imc;
>   		avg_diff_per = (int)(avg_diff * 100);
>   
> -		ksft_print_msg("%s MBA: diff within %d%% for schemata %u\n",
> -			       avg_diff_per > MAX_DIFF_PERCENT ?
> -			       "Fail:" : "Pass:",
> +		ksft_print_msg("Check MBA diff within %d%% for schemata %u\n",
>   			       MAX_DIFF_PERCENT,
>   			       ALLOCATION_MAX - ALLOCATION_STEP * allocation);
>   
> @@ -93,10 +91,9 @@ static void show_mba_info(unsigned long *bw_imc, unsigned long *bw_resc)
>   			failed = true;
>   	}
>   
> -	ksft_print_msg("%s schemata change using MBA\n",
> -		       failed ? "Fail:" : "Pass:");
> +	ksft_print_msg("Check schemata change using MBA\n");
>   	if (failed)
> -		ksft_print_msg("At least one test failed");
> +		ksft_print_msg("At least one test failed\n");
>   }
>   
>   static int check_results(void)
> diff --git a/tools/testing/selftests/resctrl/mbm_test.c b/tools/testing/selftests/resctrl/mbm_test.c
> index 02b1ed03f1e5..e2e7ee4ec630 100644
> --- a/tools/testing/selftests/resctrl/mbm_test.c
> +++ b/tools/testing/selftests/resctrl/mbm_test.c
> @@ -37,8 +37,7 @@ show_bw_info(unsigned long *bw_imc, unsigned long *bw_resc, int span)
>   	avg_diff_per = (int)(avg_diff * 100);
>   
>   	ret = avg_diff_per > MAX_DIFF_PERCENT;
> -	ksft_print_msg("%s MBM: diff within %d%%\n",
> -		       ret ? "Fail:" : "Pass:", MAX_DIFF_PERCENT);
> +	ksft_print_msg("Check MBM diff within %d%%\n", MAX_DIFF_PERCENT);

Here

>   	ksft_print_msg("avg_diff_per: %d%%\n", avg_diff_per);
>   	ksft_print_msg("Span (MB): %d\n", span);
>   	ksft_print_msg("avg_bw_imc: %lu\n", avg_bw_imc);
> diff --git a/tools/testing/selftests/resctrl/resctrlfs.c b/tools/testing/selftests/resctrl/resctrlfs.c
> index ade5f2b8b843..91cb3c48a7da 100644
> --- a/tools/testing/selftests/resctrl/resctrlfs.c
> +++ b/tools/testing/selftests/resctrl/resctrlfs.c
> @@ -570,15 +570,12 @@ bool check_resctrlfs_support(void)
>   
>   	fclose(inf);
>   
> -	ksft_print_msg("%s kernel supports resctrl filesystem\n",
> -		       ret ? "Pass:" : "Fail:");
> -
> +	ksft_print_msg("Check kernel support for resctrl filesystem\n");

Here

>   	if (!ret)
>   		return ret;
>   
>   	dp = opendir(RESCTRL_PATH);
> -	ksft_print_msg("%s resctrl mountpoint \"%s\" exists\n",
> -		       dp ? "Pass:" : "Fail:", RESCTRL_PATH);
> +	ksft_print_msg("Check resctrl mountpoint \"%s\"\n", RESCTRL_PATH);

Here

>   	if (dp)
>   		closedir(dp);
>   
> 

thanks,
-- Shuah