Sorry for the typo at the commit summary. Fat fingers...
On 7/18/2016 9:52 AM, Sinan Kaya wrote:
> 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 <okaya@xxxxxxxxxxxxxx>
> ---
> 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:
>
--
Sinan Kaya
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.
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