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mmc: mmc_test: add tests to measure large sequential I/O performance

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Add two large sequential I/O performance tests:
        35. Large sequential read into scattered pages
        36. Large sequential write from scattered pages

The tests measure transfer times for 10MiB, 100MiB, 1000MiB.

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 13:41:03 +02:00 committed by Chris Ball
parent b6056d1234
commit a803d551d9
1 changed files with 100 additions and 0 deletions
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100
drivers/mmc/card/mmc_test.c
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@ -1871,6 +1871,92 @@ static int mmc_test_random_write_perf(struct mmc_test_card *test)
return mmc_test_random_perf(test, 1);
}
static int mmc_test_seq_perf(struct mmc_test_card *test, int write,
unsigned int tot_sz, int max_scatter)
{
unsigned int dev_addr, i, cnt, sz, ssz;
struct timespec ts1, ts2, ts;
int ret;
sz = test->area.max_tfr;
/*
* In the case of a maximally scattered transfer, the maximum transfer
* size is further limited by using PAGE_SIZE segments.
*/
if (max_scatter) {
struct mmc_test_area *t = &test->area;
unsigned long max_tfr;
if (t->max_seg_sz >= PAGE_SIZE)
max_tfr = t->max_segs * PAGE_SIZE;
else
max_tfr = t->max_segs * t->max_seg_sz;
if (sz > max_tfr)
sz = max_tfr;
}
ssz = sz >> 9;
dev_addr = mmc_test_capacity(test->card) / 4;
if (tot_sz > dev_addr << 9)
tot_sz = dev_addr << 9;
cnt = tot_sz / sz;
dev_addr &= 0xffff0000; /* Round to 64MiB boundary */
getnstimeofday(&ts1);
for (i = 0; i < cnt; i++) {
ret = mmc_test_area_io(test, sz, dev_addr, write,
max_scatter, 0);
if (ret)
return ret;
dev_addr += ssz;
}
getnstimeofday(&ts2);
ts = timespec_sub(ts2, ts1);
mmc_test_print_avg_rate(test, sz, cnt, &ts1, &ts2);
return 0;
}
static int mmc_test_large_seq_perf(struct mmc_test_card *test, int write)
{
int ret, i;
for (i = 0; i < 10; i++) {
ret = mmc_test_seq_perf(test, write, 10 * 1024 * 1024, 1);
if (ret)
return ret;
}
for (i = 0; i < 5; i++) {
ret = mmc_test_seq_perf(test, write, 100 * 1024 * 1024, 1);
if (ret)
return ret;
}
for (i = 0; i < 3; i++) {
ret = mmc_test_seq_perf(test, write, 1000 * 1024 * 1024, 1);
if (ret)
return ret;
}
return ret;
}
/*
* Large sequential read performance.
*/
static int mmc_test_large_seq_read_perf(struct mmc_test_card *test)
{
return mmc_test_large_seq_perf(test, 0);
}
/*
* Large sequential write performance.
*/
static int mmc_test_large_seq_write_perf(struct mmc_test_card *test)
{
return mmc_test_large_seq_perf(test, 1);
}
static const struct mmc_test_case mmc_test_cases[] = {
{
.name = "Basic write (no data verification)",
@ -2124,6 +2210,20 @@ static const struct mmc_test_case mmc_test_cases[] = {
.cleanup = mmc_test_area_cleanup,
},
{
.name = "Large sequential read into scattered pages",
.prepare = mmc_test_area_prepare,
.run = mmc_test_large_seq_read_perf,
.cleanup = mmc_test_area_cleanup,
},
{
.name = "Large sequential write from scattered pages",
.prepare = mmc_test_area_prepare,
.run = mmc_test_large_seq_write_perf,
.cleanup = mmc_test_area_cleanup,
},
};
static DEFINE_MUTEX(mmc_test_lock);