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mmc_test: use ktime_get_ts64 for timestamps
Calling getnstimeofday() can suffer from time jumps and from the y2038 overflow, so it is not appropriate here. Using ktime_get_ts64() solves both problems. Using ktime_get() with ktime_t timestamps would also work, but it seems that we mainly want to print the times as seconds+nanoseconds, so it would require an extra division in the output. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Arnd Bergmann
Ulf Hansson
parent
043f2dca36
commit
a5b97be2a7
@ -101,7 +101,7 @@ struct mmc_test_transfer_result {
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struct list_head link;
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unsigned int count;
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unsigned int sectors;
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struct timespec ts;
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struct timespec64 ts;
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unsigned int rate;
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unsigned int iops;
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};
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@ -510,14 +510,11 @@ static int mmc_test_map_sg_max_scatter(struct mmc_test_mem *mem,
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/*
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* Calculate transfer rate in bytes per second.
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*/
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static unsigned int mmc_test_rate(uint64_t bytes, struct timespec *ts)
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static unsigned int mmc_test_rate(uint64_t bytes, struct timespec64 *ts)
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{
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uint64_t ns;
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ns = ts->tv_sec;
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ns *= 1000000000;
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ns += ts->tv_nsec;
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ns = timespec64_to_ns(ts);
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bytes *= 1000000000;
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while (ns > UINT_MAX) {
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@ -537,7 +534,7 @@ static unsigned int mmc_test_rate(uint64_t bytes, struct timespec *ts)
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* Save transfer results for future usage
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*/
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static void mmc_test_save_transfer_result(struct mmc_test_card *test,
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unsigned int count, unsigned int sectors, struct timespec ts,
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unsigned int count, unsigned int sectors, struct timespec64 ts,
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unsigned int rate, unsigned int iops)
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{
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struct mmc_test_transfer_result *tr;
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@ -562,21 +559,21 @@ static void mmc_test_save_transfer_result(struct mmc_test_card *test,
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* Print the transfer rate.
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*/
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static void mmc_test_print_rate(struct mmc_test_card *test, uint64_t bytes,
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struct timespec *ts1, struct timespec *ts2)
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struct timespec64 *ts1, struct timespec64 *ts2)
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{
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unsigned int rate, iops, sectors = bytes >> 9;
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struct timespec ts;
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struct timespec64 ts;
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ts = timespec_sub(*ts2, *ts1);
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ts = timespec64_sub(*ts2, *ts1);
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rate = mmc_test_rate(bytes, &ts);
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iops = mmc_test_rate(100, &ts); /* I/O ops per sec x 100 */
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pr_info("%s: Transfer of %u sectors (%u%s KiB) took %lu.%09lu "
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pr_info("%s: Transfer of %u sectors (%u%s KiB) took %llu.%09u "
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"seconds (%u kB/s, %u KiB/s, %u.%02u IOPS)\n",
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mmc_hostname(test->card->host), sectors, sectors >> 1,
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(sectors & 1 ? ".5" : ""), (unsigned long)ts.tv_sec,
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(unsigned long)ts.tv_nsec, rate / 1000, rate / 1024,
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(sectors & 1 ? ".5" : ""), (u64)ts.tv_sec,
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(u32)ts.tv_nsec, rate / 1000, rate / 1024,
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iops / 100, iops % 100);
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mmc_test_save_transfer_result(test, 1, sectors, ts, rate, iops);
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@ -586,24 +583,24 @@ static void mmc_test_print_rate(struct mmc_test_card *test, uint64_t bytes,
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* Print the average transfer rate.
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*/
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static void mmc_test_print_avg_rate(struct mmc_test_card *test, uint64_t bytes,
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unsigned int count, struct timespec *ts1,
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struct timespec *ts2)
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unsigned int count, struct timespec64 *ts1,
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struct timespec64 *ts2)
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{
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unsigned int rate, iops, sectors = bytes >> 9;
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uint64_t tot = bytes * count;
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struct timespec ts;
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struct timespec64 ts;
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ts = timespec_sub(*ts2, *ts1);
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ts = timespec64_sub(*ts2, *ts1);
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rate = mmc_test_rate(tot, &ts);
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iops = mmc_test_rate(count * 100, &ts); /* I/O ops per sec x 100 */
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pr_info("%s: Transfer of %u x %u sectors (%u x %u%s KiB) took "
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"%lu.%09lu seconds (%u kB/s, %u KiB/s, "
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"%llu.%09u seconds (%u kB/s, %u KiB/s, "
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"%u.%02u IOPS, sg_len %d)\n",
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mmc_hostname(test->card->host), count, sectors, count,
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sectors >> 1, (sectors & 1 ? ".5" : ""),
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(unsigned long)ts.tv_sec, (unsigned long)ts.tv_nsec,
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(u64)ts.tv_sec, (u32)ts.tv_nsec,
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rate / 1000, rate / 1024, iops / 100, iops % 100,
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test->area.sg_len);
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@ -1444,7 +1441,7 @@ static int mmc_test_area_io_seq(struct mmc_test_card *test, unsigned long sz,
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int max_scatter, int timed, int count,
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bool nonblock, int min_sg_len)
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{
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struct timespec ts1, ts2;
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struct timespec64 ts1, ts2;
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int ret = 0;
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int i;
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struct mmc_test_area *t = &test->area;
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@ -1470,7 +1467,7 @@ static int mmc_test_area_io_seq(struct mmc_test_card *test, unsigned long sz,
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return ret;
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if (timed)
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getnstimeofday(&ts1);
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ktime_get_ts64(&ts1);
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if (nonblock)
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ret = mmc_test_nonblock_transfer(test, t->sg, t->sg_len,
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dev_addr, t->blocks, 512, write, count);
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@ -1484,7 +1481,7 @@ static int mmc_test_area_io_seq(struct mmc_test_card *test, unsigned long sz,
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return ret;
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if (timed)
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getnstimeofday(&ts2);
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ktime_get_ts64(&ts2);
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if (timed)
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mmc_test_print_avg_rate(test, sz, count, &ts1, &ts2);
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@ -1742,7 +1739,7 @@ static int mmc_test_profile_trim_perf(struct mmc_test_card *test)
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struct mmc_test_area *t = &test->area;
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unsigned long sz;
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unsigned int dev_addr;
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struct timespec ts1, ts2;
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struct timespec64 ts1, ts2;
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int ret;
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if (!mmc_can_trim(test->card))
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@ -1753,19 +1750,19 @@ static int mmc_test_profile_trim_perf(struct mmc_test_card *test)
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for (sz = 512; sz < t->max_sz; sz <<= 1) {
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dev_addr = t->dev_addr + (sz >> 9);
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getnstimeofday(&ts1);
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ktime_get_ts64(&ts1);
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ret = mmc_erase(test->card, dev_addr, sz >> 9, MMC_TRIM_ARG);
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if (ret)
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return ret;
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getnstimeofday(&ts2);
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ktime_get_ts64(&ts2);
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mmc_test_print_rate(test, sz, &ts1, &ts2);
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}
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dev_addr = t->dev_addr;
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getnstimeofday(&ts1);
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ktime_get_ts64(&ts1);
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ret = mmc_erase(test->card, dev_addr, sz >> 9, MMC_TRIM_ARG);
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if (ret)
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return ret;
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getnstimeofday(&ts2);
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ktime_get_ts64(&ts2);
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mmc_test_print_rate(test, sz, &ts1, &ts2);
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return 0;
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}
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@ -1774,19 +1771,19 @@ static int mmc_test_seq_read_perf(struct mmc_test_card *test, unsigned long sz)
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{
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struct mmc_test_area *t = &test->area;
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unsigned int dev_addr, i, cnt;
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struct timespec ts1, ts2;
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struct timespec64 ts1, ts2;
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int ret;
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cnt = t->max_sz / sz;
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dev_addr = t->dev_addr;
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getnstimeofday(&ts1);
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ktime_get_ts64(&ts1);
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for (i = 0; i < cnt; i++) {
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ret = mmc_test_area_io(test, sz, dev_addr, 0, 0, 0);
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if (ret)
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return ret;
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dev_addr += (sz >> 9);
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}
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getnstimeofday(&ts2);
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ktime_get_ts64(&ts2);
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mmc_test_print_avg_rate(test, sz, cnt, &ts1, &ts2);
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return 0;
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}
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@ -1813,7 +1810,7 @@ static int mmc_test_seq_write_perf(struct mmc_test_card *test, unsigned long sz)
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{
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struct mmc_test_area *t = &test->area;
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unsigned int dev_addr, i, cnt;
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struct timespec ts1, ts2;
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struct timespec64 ts1, ts2;
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int ret;
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ret = mmc_test_area_erase(test);
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@ -1821,14 +1818,14 @@ static int mmc_test_seq_write_perf(struct mmc_test_card *test, unsigned long sz)
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return ret;
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cnt = t->max_sz / sz;
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dev_addr = t->dev_addr;
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getnstimeofday(&ts1);
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ktime_get_ts64(&ts1);
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for (i = 0; i < cnt; i++) {
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ret = mmc_test_area_io(test, sz, dev_addr, 1, 0, 0);
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if (ret)
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return ret;
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dev_addr += (sz >> 9);
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}
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getnstimeofday(&ts2);
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ktime_get_ts64(&ts2);
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mmc_test_print_avg_rate(test, sz, cnt, &ts1, &ts2);
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return 0;
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}
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@ -1859,7 +1856,7 @@ static int mmc_test_profile_seq_trim_perf(struct mmc_test_card *test)
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struct mmc_test_area *t = &test->area;
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unsigned long sz;
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unsigned int dev_addr, i, cnt;
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struct timespec ts1, ts2;
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struct timespec64 ts1, ts2;
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int ret;
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if (!mmc_can_trim(test->card))
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@ -1877,7 +1874,7 @@ static int mmc_test_profile_seq_trim_perf(struct mmc_test_card *test)
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return ret;
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cnt = t->max_sz / sz;
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dev_addr = t->dev_addr;
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getnstimeofday(&ts1);
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ktime_get_ts64(&ts1);
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for (i = 0; i < cnt; i++) {
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ret = mmc_erase(test->card, dev_addr, sz >> 9,
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MMC_TRIM_ARG);
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@ -1885,7 +1882,7 @@ static int mmc_test_profile_seq_trim_perf(struct mmc_test_card *test)
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return ret;
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dev_addr += (sz >> 9);
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}
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getnstimeofday(&ts2);
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ktime_get_ts64(&ts2);
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mmc_test_print_avg_rate(test, sz, cnt, &ts1, &ts2);
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}
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return 0;
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@ -1907,7 +1904,7 @@ static int mmc_test_rnd_perf(struct mmc_test_card *test, int write, int print,
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{
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unsigned int dev_addr, cnt, rnd_addr, range1, range2, last_ea = 0, ea;
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unsigned int ssz;
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struct timespec ts1, ts2, ts;
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struct timespec64 ts1, ts2, ts;
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int ret;
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ssz = sz >> 9;
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@ -1916,10 +1913,10 @@ static int mmc_test_rnd_perf(struct mmc_test_card *test, int write, int print,
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range1 = rnd_addr / test->card->pref_erase;
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range2 = range1 / ssz;
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getnstimeofday(&ts1);
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ktime_get_ts64(&ts1);
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for (cnt = 0; cnt < UINT_MAX; cnt++) {
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getnstimeofday(&ts2);
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ts = timespec_sub(ts2, ts1);
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ktime_get_ts64(&ts2);
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ts = timespec64_sub(ts2, ts1);
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if (ts.tv_sec >= 10)
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break;
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ea = mmc_test_rnd_num(range1);
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@ -1993,7 +1990,7 @@ static int mmc_test_seq_perf(struct mmc_test_card *test, int write,
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{
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struct mmc_test_area *t = &test->area;
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unsigned int dev_addr, i, cnt, sz, ssz;
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struct timespec ts1, ts2;
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struct timespec64 ts1, ts2;
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int ret;
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sz = t->max_tfr;
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@ -2020,7 +2017,7 @@ static int mmc_test_seq_perf(struct mmc_test_card *test, int write,
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cnt = tot_sz / sz;
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dev_addr &= 0xffff0000; /* Round to 64MiB boundary */
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getnstimeofday(&ts1);
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ktime_get_ts64(&ts1);
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for (i = 0; i < cnt; i++) {
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ret = mmc_test_area_io(test, sz, dev_addr, write,
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max_scatter, 0);
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@ -2028,7 +2025,7 @@ static int mmc_test_seq_perf(struct mmc_test_card *test, int write,
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return ret;
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dev_addr += ssz;
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}
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getnstimeofday(&ts2);
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ktime_get_ts64(&ts2);
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mmc_test_print_avg_rate(test, sz, cnt, &ts1, &ts2);
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@ -3052,10 +3049,9 @@ static int mtf_test_show(struct seq_file *sf, void *data)
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seq_printf(sf, "Test %d: %d\n", gr->testcase + 1, gr->result);
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list_for_each_entry(tr, &gr->tr_lst, link) {
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seq_printf(sf, "%u %d %lu.%09lu %u %u.%02u\n",
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seq_printf(sf, "%u %d %llu.%09u %u %u.%02u\n",
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tr->count, tr->sectors,
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(unsigned long)tr->ts.tv_sec,
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(unsigned long)tr->ts.tv_nsec,
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(u64)tr->ts.tv_sec, (u32)tr->ts.tv_nsec,
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tr->rate, tr->iops / 100, tr->iops % 100);
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}
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}
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