[PATCH V2] dmenginer: dmatest: exclude compare and fill time during perf report
From: Sinan Kaya <hidden>
Date: 2016-07-18 13:53:07
Also in:
linux-arm-msm, lkml
Subsystem:
dma generic offload engine subsystem, the rest · Maintainers:
Vinod Koul, Linus Torvalds
Dmatest is currently including compare and fill time into the calculated performance numbers. This does not reflect the HW capability and the results vary based on the transfer sizes used. Signed-off-by: Sinan Kaya <redacted> --- drivers/dma/dmatest.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index b8576fd..0b3e1f9 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c@@ -416,7 +416,9 @@ static int dmatest_func(void *data) int src_cnt; int dst_cnt; int i; - ktime_t ktime; + ktime_t ktime, start, diff; + ktime_t filltime = ktime_set(0, 0); + ktime_t comparetime = ktime_set(0, 0); s64 runtime = 0; unsigned long long total_len = 0;
@@ -517,6 +519,7 @@ static int dmatest_func(void *data) src_off = 0; dst_off = 0; } else { + start = ktime_get(); src_off = dmatest_random() % (params->buf_size - len + 1); dst_off = dmatest_random() % (params->buf_size - len + 1);
@@ -527,6 +530,9 @@ static int dmatest_func(void *data) params->buf_size); dmatest_init_dsts(thread->dsts, dst_off, len, params->buf_size); + + diff = ktime_sub(ktime_get(), start); + filltime = ktime_add(filltime, diff); } um = dmaengine_get_unmap_data(dev->dev, src_cnt+dst_cnt,
@@ -657,6 +663,7 @@ static int dmatest_func(void *data) continue; } + start = ktime_get(); pr_debug("%s: verifying source buffer...\n", current->comm); error_count = dmatest_verify(thread->srcs, 0, src_off, 0, PATTERN_SRC, true);
@@ -677,6 +684,9 @@ static int dmatest_func(void *data) params->buf_size, dst_off + len, PATTERN_DST, false); + diff = ktime_sub(ktime_get(), start); + comparetime = ktime_add(comparetime, diff); + if (error_count) { result("data error", total_tests, src_off, dst_off, len, error_count);
@@ -686,7 +696,10 @@ static int dmatest_func(void *data) dst_off, len, 0); } } - runtime = ktime_us_delta(ktime_get(), ktime); + ktime = ktime_sub(ktime_get(), ktime); + ktime = ktime_sub(ktime, comparetime); + ktime = ktime_sub(ktime, filltime); + runtime = ktime_to_us(ktime); ret = 0; err_dstbuf:
--
1.8.2.1