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| author | Maramaina Naresh <[email protected]> | 2023-12-19 18:07:05 +0530 |
|---|---|---|
| committer | Martin K. Petersen <[email protected]> | 2024-01-23 21:00:02 -0500 |
| commit | 2777e73fc154e2e87233bdcc0e2402b33815198e (patch) | |
| tree | 9ba1f9cc31633d36c675c78a51a5044eda03109b /rust/helpers/helpers.c | |
| parent | 6613476e225e090cc9aad49be7fa504e290dd33d (diff) | |
scsi: ufs: core: Add CPU latency QoS support for UFS driver
Register UFS driver to CPU latency PM QoS framework to improve UFS device
random I/O performance.
PM QoS initialization will insert new QoS request into the CPU latency QoS
list with the maximum latency PM_QOS_DEFAULT_VALUE value.
The UFS driver will vote for performance mode on scale up and power save
mode for scale down.
If clock scaling feature is not enabled then voting will be based on clock
on or off condition. Also provide a sysfs interface to enable/disable PM
QoS feature.
tiotest benchmark tool I/O performance results on sm8550 platform:
1. Without PM QoS support
Type (Speed in) | Average of 18 iterations
Random Write(IPOS) | 41065.13
Random Read(IPOS) | 37101.3
2. With PM QoS support
Type (Speed in) | Average of 18 iterations
Random Write(IPOS) | 46784.9
Random Read(IPOS) | 42943.4
(Improvement with PM QoS = ~15%).
Reviewed-by: Peter Wang <[email protected]>
Reviewed-by: AngeloGioacchino Del Regno <[email protected]>
Co-developed-by: Nitin Rawat <[email protected]>
Signed-off-by: Nitin Rawat <[email protected]>
Co-developed-by: Naveen Kumar Goud Arepalli <[email protected]>
Signed-off-by: Naveen Kumar Goud Arepalli <[email protected]>
Signed-off-by: Maramaina Naresh <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Bart Van Assche <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Diffstat (limited to 'rust/helpers/helpers.c')
0 files changed, 0 insertions, 0 deletions