From mboxrd@z Thu Jan 1 00:00:00 1970 From: Adrian Hunter Subject: [PATCH 3/3] mmc_test: add tests to measure large sequential I/O performance Date: Tue, 8 Feb 2011 13:41:03 +0200 Message-ID: <1297165263-656-4-git-send-email-adrian.hunter@nokia.com> References: <1297165263-656-1-git-send-email-adrian.hunter@nokia.com> Return-path: Received: from smtp.nokia.com ([147.243.1.47]:51222 "EHLO mgw-sa01.nokia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753516Ab1BHLlj (ORCPT ); Tue, 8 Feb 2011 06:41:39 -0500 In-Reply-To: <1297165263-656-1-git-send-email-adrian.hunter@nokia.com> Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Chris Ball Cc: Adrian Hunter , linux-mmc Mailing List 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 --- drivers/mmc/card/mmc_test.c | 100 +++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 100 insertions(+), 0 deletions(-) diff --git a/drivers/mmc/card/mmc_test.c b/drivers/mmc/card/mmc_test.c index d1aa57a..5ec8edd 100644 --- a/drivers/mmc/card/mmc_test.c +++ b/drivers/mmc/card/mmc_test.c @@ -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); -- 1.7.0.4