Messages in this thread Patch in this message | | | From | Hui Zhu <> | Subject | [PATCH] usemem: Add option init-time | Date | Wed, 16 Dec 2020 21:58:45 +0800 |
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From: Hui Zhu <teawaterz@linux.alibaba.com>
This commit add a new option init-time to remove the initialization time from the run time and show the initialization time.
Signed-off-by: Hui Zhu <teawaterz@linux.alibaba.com> --- usemem.c | 29 +++++++++++++++++++++++++++-- 1 file changed, 27 insertions(+), 2 deletions(-)
diff --git a/usemem.c b/usemem.c index 823647e..6d1d575 100644 --- a/usemem.c +++ b/usemem.c @@ -96,6 +96,7 @@ int opt_bind_interval = 0; unsigned long opt_delay = 0; int opt_read_again = 0; int opt_punch_holes = 0; +int opt_init_time = 0; int nr_task; int nr_thread; int nr_cpu; @@ -155,6 +156,7 @@ void usage(int ok) " -U|--hugetlb allocate hugetlbfs page\n" " -Z|--read-again read memory again after access the memory\n" " --punch-holes free every other page after allocation\n" + " --init-time remove the initialization time from the run time and show the initialization time\n" " -h|--help show this message\n" , ourname); @@ -193,7 +195,8 @@ static const struct option opts[] = { { "delay" , 1, NULL, 'e' }, { "hugetlb" , 0, NULL, 'U' }, { "read-again" , 0, NULL, 'Z' }, - { "punch-holes" , 0, NULL, 0 }, + { "punch-holes" , 0, NULL, 0 }, + { "init-time" , 0, NULL, 0 }, { "help" , 0, NULL, 'h' }, { NULL , 0, NULL, 0 } }; @@ -945,6 +948,8 @@ int main(int argc, char *argv[]) case 0: if (strcmp(opts[opt_index].name, "punch-holes") == 0) { opt_punch_holes = 1; + } else if (strcmp(opts[opt_index].name, "init-time") == 0) { + opt_init_time = 1; } else usage(1); break; @@ -1128,7 +1133,7 @@ int main(int argc, char *argv[]) if (optind != argc - 1) usage(0); - if (!opt_write_signal_read) + if (!opt_write_signal_read || opt_init_time) gettimeofday(&start_time, NULL); opt_bytes = memparse(argv[optind], NULL); @@ -1263,5 +1268,25 @@ int main(int argc, char *argv[]) if (!nr_task) nr_task = 1; + if (opt_init_time) { + struct timeval stop; + char buf[1024]; + size_t len; + unsigned long delta_us; + + gettimeofday(&stop, NULL); + delta_us = (stop.tv_sec - start_time.tv_sec) * 1000000 + + (stop.tv_usec - start_time.tv_usec); + len = snprintf(buf, sizeof(buf), + "the initialization time is %lu secs %lu usecs\n", + delta_us / 1000000, delta_us % 1000000); + fflush(stdout); + if (write(1, buf, len) != len) + fprintf(stderr, "WARNING: statistics output may be incomplete.\n"); + + if (!opt_write_signal_read) + gettimeofday(&start_time, NULL); + } + return do_tasks(); } -- 2.17.1
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