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mmc: mmc_test: add tests to measure random I/O operations per second 

Existing performance tests measure single or sequential I/O speed.
Add two random I/O tests:
        33. Random read performance by transfer size
        34. Random write performance by transfer size

Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Adrian Hunter 2011-02-08 13:41:02 +02:00 committed by Chris Ball
parent 0532ff6358
commit b6056d1234
1 changed files with 128 additions and 11 deletions
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139
drivers/mmc/card/mmc_test.c
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@ -88,6 +88,7 @@ struct mmc_test_area {
* @sectors: amount of sectors to check in one group
* @ts: time values of transfer
* @rate: calculated transfer rate
* @iops: I/O operations per second (times 100)
*/
struct mmc_test_transfer_result {
struct list_head link;
@ -95,6 +96,7 @@ struct mmc_test_transfer_result {
unsigned int sectors;
struct timespec ts;
unsigned int rate;
unsigned int iops;
};
/**
@ -495,7 +497,7 @@ static unsigned int mmc_test_rate(uint64_t bytes, struct timespec *ts)
*/
static void mmc_test_save_transfer_result(struct mmc_test_card *test,
unsigned int count, unsigned int sectors, struct timespec ts,
unsigned int rate)
unsigned int rate, unsigned int iops)
{
struct mmc_test_transfer_result *tr;
@ -510,6 +512,7 @@ static void mmc_test_save_transfer_result(struct mmc_test_card *test,
tr->sectors = sectors;
tr->ts = ts;
tr->rate = rate;
tr->iops = iops;
list_add_tail(&tr->link, &test->gr->tr_lst);
}
@ -520,20 +523,22 @@ static void mmc_test_save_transfer_result(struct mmc_test_card *test,
static void mmc_test_print_rate(struct mmc_test_card *test, uint64_t bytes,
struct timespec *ts1, struct timespec *ts2)
{
unsigned int rate, sectors = bytes >> 9;
unsigned int rate, iops, sectors = bytes >> 9;
struct timespec ts;
ts = timespec_sub(*ts2, *ts1);
rate = mmc_test_rate(bytes, &ts);
iops = mmc_test_rate(100, &ts); /* I/O ops per sec x 100 */
printk(KERN_INFO "%s: Transfer of %u sectors (%u%s KiB) took %lu.%09lu "
"seconds (%u kB/s, %u KiB/s)\n",
"seconds (%u kB/s, %u KiB/s, %u.%02u IOPS)\n",
mmc_hostname(test->card->host), sectors, sectors >> 1,
(sectors & 1 ? ".5" : ""), (unsigned long)ts.tv_sec,
(unsigned long)ts.tv_nsec, rate / 1000, rate / 1024);
(unsigned long)ts.tv_nsec, rate / 1000, rate / 1024,
iops / 100, iops % 100);
mmc_test_save_transfer_result(test, 1, sectors, ts, rate);
mmc_test_save_transfer_result(test, 1, sectors, ts, rate, iops);
}
/*
@ -543,22 +548,24 @@ static void mmc_test_print_avg_rate(struct mmc_test_card *test, uint64_t bytes,
unsigned int count, struct timespec *ts1,
struct timespec *ts2)
{
unsigned int rate, sectors = bytes >> 9;
unsigned int rate, iops, sectors = bytes >> 9;
uint64_t tot = bytes * count;
struct timespec ts;
ts = timespec_sub(*ts2, *ts1);
rate = mmc_test_rate(tot, &ts);
iops = mmc_test_rate(count * 100, &ts); /* I/O ops per sec x 100 */
printk(KERN_INFO "%s: Transfer of %u x %u sectors (%u x %u%s KiB) took "
"%lu.%09lu seconds (%u kB/s, %u KiB/s)\n",
"%lu.%09lu seconds (%u kB/s, %u KiB/s, "
"%u.%02u IOPS)\n",
mmc_hostname(test->card->host), count, sectors, count,
sectors >> 1, (sectors & 1 ? ".5" : ""),
(unsigned long)ts.tv_sec, (unsigned long)ts.tv_nsec,
rate / 1000, rate / 1024);
rate / 1000, rate / 1024, iops / 100, iops % 100);
mmc_test_save_transfer_result(test, count, sectors, ts, rate);
mmc_test_save_transfer_result(test, count, sectors, ts, rate, iops);
}
/*
@ -1768,6 +1775,102 @@ static int mmc_test_profile_seq_trim_perf(struct mmc_test_card *test)
return 0;
}
static unsigned int rnd_next = 1;
static unsigned int mmc_test_rnd_num(unsigned int rnd_cnt)
{
uint64_t r;
rnd_next = rnd_next * 1103515245 + 12345;
r = (rnd_next >> 16) & 0x7fff;
return (r * rnd_cnt) >> 15;
}
static int mmc_test_rnd_perf(struct mmc_test_card *test, int write, int print,
unsigned long sz)
{
unsigned int dev_addr, cnt, rnd_addr, range1, range2, last_ea = 0, ea;
unsigned int ssz;
struct timespec ts1, ts2, ts;
int ret;
ssz = sz >> 9;
rnd_addr = mmc_test_capacity(test->card) / 4;
range1 = rnd_addr / test->card->pref_erase;
range2 = range1 / ssz;
getnstimeofday(&ts1);
for (cnt = 0; cnt < UINT_MAX; cnt++) {
getnstimeofday(&ts2);
ts = timespec_sub(ts2, ts1);
if (ts.tv_sec >= 10)
break;
ea = mmc_test_rnd_num(range1);
if (ea == last_ea)
ea -= 1;
last_ea = ea;
dev_addr = rnd_addr + test->card->pref_erase * ea +
ssz * mmc_test_rnd_num(range2);
ret = mmc_test_area_io(test, sz, dev_addr, write, 0, 0);
if (ret)
return ret;
}
if (print)
mmc_test_print_avg_rate(test, sz, cnt, &ts1, &ts2);
return 0;
}
static int mmc_test_random_perf(struct mmc_test_card *test, int write)
{
unsigned int next;
unsigned long sz;
int ret;
for (sz = 512; sz < test->area.max_tfr; sz <<= 1) {
/*
* When writing, try to get more consistent results by running
* the test twice with exactly the same I/O but outputting the
* results only for the 2nd run.
*/
if (write) {
next = rnd_next;
ret = mmc_test_rnd_perf(test, write, 0, sz);
if (ret)
return ret;
rnd_next = next;
}
ret = mmc_test_rnd_perf(test, write, 1, sz);
if (ret)
return ret;
}
sz = test->area.max_tfr;
if (write) {
next = rnd_next;
ret = mmc_test_rnd_perf(test, write, 0, sz);
if (ret)
return ret;
rnd_next = next;
}
return mmc_test_rnd_perf(test, write, 1, sz);
}
/*
* Random read performance by transfer size.
*/
static int mmc_test_random_read_perf(struct mmc_test_card *test)
{
return mmc_test_random_perf(test, 0);
}
/*
* Random write performance by transfer size.
*/
static int mmc_test_random_write_perf(struct mmc_test_card *test)
{
return mmc_test_random_perf(test, 1);
}
static const struct mmc_test_case mmc_test_cases[] = {
{
.name = "Basic write (no data verification)",
@ -2007,6 +2110,20 @@ static const struct mmc_test_case mmc_test_cases[] = {
.cleanup = mmc_test_area_cleanup,
},
{
.name = "Random read performance by transfer size",
.prepare = mmc_test_area_prepare,
.run = mmc_test_random_read_perf,
.cleanup = mmc_test_area_cleanup,
},
{
.name = "Random write performance by transfer size",
.prepare = mmc_test_area_prepare,
.run = mmc_test_random_write_perf,
.cleanup = mmc_test_area_cleanup,
},
};
static DEFINE_MUTEX(mmc_test_lock);
@ -2150,11 +2267,11 @@ static int mtf_test_show(struct seq_file *sf, void *data)
seq_printf(sf, "Test %d: %d\n", gr->testcase + 1, gr->result);
list_for_each_entry(tr, &gr->tr_lst, link) {
seq_printf(sf, "%u %d %lu.%09lu %u\n",
seq_printf(sf, "%u %d %lu.%09lu %u %u.%02u\n",
tr->count, tr->sectors,
(unsigned long)tr->ts.tv_sec,
(unsigned long)tr->ts.tv_nsec,
tr->rate);
tr->rate, tr->iops / 100, tr->iops % 100);
}
}