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| author | Wenchao Chen <wenchao.chen@unisoc.com> | 2023-09-19 10:47:07 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2023-09-27 13:13:18 +0300 |
| commit | 68df98c48398e68e7f187b5ee92fb2576d6fd7d1 (patch) | |
| tree | 5ec0795a196b429c9d416b5d5ee68ed7a833fb8a /drivers/mmc/host/mmc_hsq.h | |
| parent | 2e2b547950bc09e75afe912f9683be39c2195d9d (diff) | |
| download | linux-68df98c48398e68e7f187b5ee92fb2576d6fd7d1.tar.xz | |
mmc: hsq: Improve random I/O write performance for 4k buffers
By dynamically adjusting the host->hsq_depth, based upon the buffer size
being 4k and that we get at least two I/O write requests in flight, we can
improve the throughput a bit. This is typical for a random I/O write
pattern.
More precisely, by dynamically changing the number of requests in flight
from 2 to 5, we can on some platforms observe ~4-5% increase in throughput.
Signed-off-by: Wenchao Chen <wenchao.chen@unisoc.com>
Link: https://lore.kernel.org/r/20230919074707.25517-3-wenchao.chen@unisoc.com
[Ulf: Re-wrote the commitmsg, minor adjustment to the code - all to clarify.]
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/mmc_hsq.h')
| -rw-r--r-- | drivers/mmc/host/mmc_hsq.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/mmc/host/mmc_hsq.h b/drivers/mmc/host/mmc_hsq.h index aa5c4543b55f..dd352a6ac32a 100644 --- a/drivers/mmc/host/mmc_hsq.h +++ b/drivers/mmc/host/mmc_hsq.h @@ -10,6 +10,11 @@ * flight to avoid a long latency. */ #define HSQ_NORMAL_DEPTH 2 +/* + * For 4k random writes, we allow hsq_depth to increase to 5 + * for better performance. + */ +#define HSQ_PERFORMANCE_DEPTH 5 struct hsq_slot { struct mmc_request *mrq; |