Re: [PATCH rt-tests v5 10/13] svsematest: Add JSON output feature

[John Kacur <jkacur@redhat.com>]

On Wed, 10 Feb 2021, Daniel Wagner wrote:

> Write the test results as JSON output to a file. This allows to
> simplifies any parsing later on.
> 
> Signed-off-by: Daniel Wagner <dwagner@suse.de>
> ---
>  src/svsematest/svsematest.c | 124 ++++++++++++++++++++++++++++++------
>  1 file changed, 104 insertions(+), 20 deletions(-)
> 
> diff --git a/src/svsematest/svsematest.c b/src/svsematest/svsematest.c
> index 7a298e0dea8c..23f84bcbd3dc 100644
> --- a/src/svsematest/svsematest.c
> +++ b/src/svsematest/svsematest.c
> @@ -20,6 +20,7 @@
>  #include <string.h>
>  #include <time.h>
>  #include <utmpx.h>
> +#include <inttypes.h>
>  
>  #include <linux/unistd.h>
>  
> @@ -233,6 +234,7 @@ static void display_help(int error)
>  	       "-f [OPT] --fork[=OPT]      fork new processes instead of creating threads\n"
>  	       "-i INTV  --interval=INTV   base interval of thread in us default=1000\n"
>  	       "-l LOOPS --loops=LOOPS     number of loops: default=0(endless)\n"
> +	       "         --output=FILENAME write final results into FILENAME, JSON formatted\n"
>  	       "-p PRIO  --prio=PRIO       priority\n"
>  	       "-S       --smp             SMP testing: options -a -t and same priority\n"
>  	       "                           of all threads\n"
> @@ -255,6 +257,13 @@ static int distance = 500;
>  static int smp;
>  static int sameprio;
>  static int quiet;
> +static char outfile[MAX_PATH];
> +
> +enum option_value {
> +	OPT_AFFINITY=1, OPT_BREAKTRACE, OPT_DISTANCE, OPT_DURATION,
> +	OPT_FORK, OPT_HELP, OPT_INTERVAL, OPT_LOOPS, OPT_OUTPUT,
> +	OPT_PRIORITY, OPT_QUIET, OPT_SMP, OPT_THREADS
> +};
>  
>  static void process_options(int argc, char *argv[])
>  {
> @@ -266,18 +275,19 @@ static void process_options(int argc, char *argv[])
>  		int option_index = 0;
>  		/** Options for getopt */
>  		static struct option long_options[] = {
> -			{"affinity",		optional_argument,	NULL, 'a'},
> -			{"breaktrace",		required_argument,	NULL, 'b'},
> -			{"distance",		required_argument,	NULL, 'd'},
> -			{"duration",		required_argument,	NULL, 'D'},
> -			{"fork",		optional_argument,	NULL, 'f'},
> -			{"help",		no_argument,		NULL, 'h'},
> -			{"interval",		required_argument,	NULL, 'i'},
> -			{"loops",		required_argument,	NULL, 'l'},
> -			{"priority",		required_argument,	NULL, 'p'},
> -			{"quiet",		no_argument,		NULL, 'q'},
> -			{"smp",			no_argument,		NULL, 'S'},
> -			{"threads",		optional_argument,	NULL, 't'},
> +			{"affinity",	optional_argument,	NULL, OPT_AFFINITY},
> +			{"breaktrace",	required_argument,	NULL, OPT_BREAKTRACE},
> +			{"distance",	required_argument,	NULL, OPT_DISTANCE},
> +			{"duration",	required_argument,	NULL, OPT_DURATION},
> +			{"fork",	optional_argument,	NULL, OPT_FORK},
> +			{"help",	no_argument,		NULL, OPT_HELP},
> +			{"interval",	required_argument,	NULL, OPT_INTERVAL},
> +			{"loops",	required_argument,	NULL, OPT_LOOPS},
> +			{"output",	required_argument,      NULL, OPT_OUTPUT},
> +			{"priority",	required_argument,	NULL, OPT_PRIORITY},
> +			{"quiet",	no_argument,		NULL, OPT_QUIET},
> +			{"smp",		no_argument,		NULL, OPT_SMP},
> +			{"threads",	optional_argument,	NULL, OPT_THREADS},
>  			{NULL, 0, NULL, 0}
>  		};
>  		int c = getopt_long (argc, argv, "a::b:d:D:f::hi:l:p:qSt::",
> @@ -285,6 +295,7 @@ static void process_options(int argc, char *argv[])
>  		if (c == -1)
>  			break;
>  		switch (c) {
> +		case OPT_AFFINITY:
>  		case 'a':
>  			if (smp) {
>  				warn("-a ignored due to --smp\n");
> @@ -300,9 +311,19 @@ static void process_options(int argc, char *argv[])
>  				setaffinity = AFFINITY_USEALL;
>  			}
>  			break;
> -		case 'b': thistracelimit = atoi(optarg); break;
> -		case 'd': distance = atoi(optarg); break;
> -		case 'D': duration = parse_time_string(optarg); break;
> +		case OPT_BREAKTRACE:
> +		case 'b':
> +			thistracelimit = atoi(optarg);
> +			break;
> +		case OPT_DISTANCE:
> +		case 'd':
> +			distance = atoi(optarg);
> +			break;
> +		case OPT_DURATION:
> +		case 'D':
> +			duration = parse_time_string(optarg);
> +			break;
> +		case OPT_FORK:
>  		case 'f':
>  			if (optarg != NULL) {
>  				wasforked = 1;
> @@ -314,16 +335,36 @@ static void process_options(int argc, char *argv[])
>  			} else
>  				mustfork = 1;
>  			break;
> -		case 'h': display_help(0); break;
> -		case 'i': interval = atoi(optarg); break;
> -		case 'l': max_cycles = atoi(optarg); break;
> -		case 'p': priority = atoi(optarg); break;
> -		case 'q': quiet = 1; break;
> +		case OPT_HELP:
> +		case 'h':
> +			display_help(0);
> +			break;
> +		case OPT_INTERVAL:
> +		case 'i':
> +			interval = atoi(optarg);
> +			break;
> +		case OPT_LOOPS:
> +		case 'l':
> +			max_cycles = atoi(optarg);
> +			break;
> +		case OPT_OUTPUT:
> +			strncpy(outfile, optarg, strnlen(optarg, MAX_PATH-1));
> +			break;
> +		case OPT_PRIORITY:
> +		case 'p':
> +			priority = atoi(optarg);
> +			break;
> +		case OPT_QUIET:
> +		case 'q':
> +			quiet = 1;
> +			break;
> +		case OPT_SMP:
>  		case 'S':
>  			smp = 1;
>  			num_threads = max_cpus;
>  			setaffinity = AFFINITY_USEALL;
>  			break;
> +		case OPT_THREADS:
>  		case 't':
>  			if (smp) {
>  				warn("-t ignored due to --smp\n");
> @@ -380,6 +421,41 @@ static void sighand(int sig)
>  	mustshutdown = 1;
>  }
>  
> +struct params_stats {
> +	struct params *receiver;
> +	struct params *sender;
> +};
> +
> +static void write_stats(FILE *f, void *data)
> +{
> +	struct params_stats *ps = data;
> +	struct params *s, *r;
> +	unsigned int i;
> +
> +	fprintf(f, "  \"num_threads\": %d,\n", num_threads);
> +	fprintf(f, "  \"thread\": {\n");
> +	for (i = 0; i < num_threads; i++) {
> +		s = &ps->sender[i];
> +		r = &ps->receiver[i];
> +		fprintf(f, "    \"%u\": {\n", i);
> +		fprintf(f, "      \"sender\": {\n");
> +		fprintf(f, "        \"cpu\": %d,\n", s->cpu);
> +		fprintf(f, "        \"priority\": %d,\n", s->priority);
> +		fprintf(f, "        \"samples\": %d,\n", s->samples);
> +		fprintf(f, "        \"interval\": %ld\n", r->delay.tv_nsec/1000);
> +		fprintf(f, "      },\n");
> +		fprintf(f, "      \"receiver\": {\n");
> +		fprintf(f, "        \"cpu\": %d,\n", r->cpu);
> +		fprintf(f, "        \"priority\": %d,\n", r->priority);
> +		fprintf(f, "        \"min\": %d,\n", r->mindiff);
> +		fprintf(f, "        \"avg\": %.2f,\n", r->sumdiff/r->samples);
> +		fprintf(f, "        \"max\": %d\n", r->maxdiff);
> +		fprintf(f, "      }\n");
> +		fprintf(f, "    }%s\n", i == num_threads - 1 ? "" : ",");
> +	}
> +	fprintf(f, "  }\n");
> +}
> +
>  static void print_stat(FILE *fp, struct params *receiver, struct params *sender,
>  		       int verbose, int quiet)
>  {
> @@ -696,6 +772,14 @@ int main(int argc, char *argv[])
>  		}
>  	}
>  
> +	if (strlen(outfile) != 0) {
> +		struct params_stats ps = {
> +			.receiver = receiver,
> +			.sender = sender,
> +		};
> +		rt_write_json(outfile, argc, argv, write_stats, &ps);
> +	}
> +
>  nosem:
>  	for (i = 0; i < num_threads; i++)
>  		semctl(receiver[i].semid, -1, IPC_RMID);
> -- 
> 2.30.0
> 
> 

Signed-off-by: John Kacur <jkacur@redhat.com>