Ping... On Tue, 5 Sept 2023 at 10:40, Wenchao Chen <wenchao.chen@xxxxxxxxxx> wrote: > > Change in v3: > - Use "mrq->data->blksz * mrq->data->blocks == 4096" for 4K. > - Add explanation for "HSQ_PERFORMANCE_DEPTH". > > Change in v2: > - Support for dynamic adjustment of hsq_depth. > > Test > ===== > I tested 3 times for each case and output a average speed. > Ran 'fio' to evaluate the performance: > 1.Fixed hsq_depth > 1) Sequential write: > Speed: 168 164 165 > Average speed: 165.67MB/S > > 2) Sequential read: > Speed: 326 326 326 > Average speed: 326MB/S > > 3) Random write: > Speed: 82.6 83 83 > Average speed: 82.87MB/S > > 4) Random read: > Speed: 48.2 48.3 47.6 > Average speed: 48.03MB/S > > 2.Dynamic hsq_depth > 1) Sequential write: > Speed: 167 166 166 > Average speed: 166.33MB/S > > 2) Sequential read: > Speed: 327 326 326 > Average speed: 326.3MB/S > > 3) Random write: > Speed: 86.1 86.2 87.7 > Average speed: 86.67MB/S > > 4) Random read: > Speed: 48.1 48 48 > Average speed: 48.03MB/S > > Based on the above data, dynamic hsq_depth can improve the performance of random writes. > Random write improved by 4.6%. > > In addition, we tested 8K and 16K. > 1.Fixed hsq_depth > 1) Random write(bs=8K): > Speed: 116 114 115 > Average speed: 115MB/S > > 2) Random read(bs=8K): > Speed: 83 83 82.5 > Average speed: 82.8MB/S > > 3) Random write(bs=16K): > Speed: 141 142 141 > Average speed: 141.3MB/S > > 4) Random read(bs=16K): > Speed: 132 132 132 > Average speed: 132MB/S > > 2.Dynamic hsq_depth(mrq->data->blksz * mrq->data->blocks == 8192 or 16384) > 1) Random write(bs=8K): > Speed: 115 115 115 > Average speed: 115MB/S > > 2) Random read(bs=8K): > Speed: 82.7 82.9 82.8 > Average speed: 82.8MB/S > > 3) Random write(bs=16K): > Speed: 143 141 141 > Average speed: 141.6MB/S > > 4) Random read(bs=16K): > Speed: 132 132 132 > Average speed: 132MB/S > > Increasing hsq_depth cannot improve 8k and 16k random read/write performance. > To reduce latency, we dynamically increase hsq_depth only for 4k random writes. > > Test cmd > ========= > 1)write: fio -filename=/dev/mmcblk0p72 -direct=1 -rw=write -bs=512K -size=512M -group_reporting -name=test -numjobs=8 -thread -iodepth=64 > 2)read: fio -filename=/dev/mmcblk0p72 -direct=1 -rw=read -bs=512K -size=512M -group_reporting -name=test -numjobs=8 -thread -iodepth=64 > 3)randwrite: fio -filename=/dev/mmcblk0p72 -direct=1 -rw=randwrite -bs=4K -size=512M -group_reporting -name=test -numjobs=8 -thread -iodepth=64 > 4)randread: fio -filename=/dev/mmcblk0p72 -direct=1 -rw=randread -bs=4K -size=512M -group_reporting -name=test -numjobs=8 -thread -iodepth=64 > 5)randwrite: fio -filename=/dev/mmcblk0p72 -direct=1 -rw=randwrite -bs=8K -size=512M -group_reporting -name=test -numjobs=8 -thread -iodepth=64 > 6)randread: fio -filename=/dev/mmcblk0p72 -direct=1 -rw=randread -bs=8K -size=512M -group_reporting -name=test -numjobs=8 -thread -iodepth=64 > 7)randwrite: fio -filename=/dev/mmcblk0p72 -direct=1 -rw=randwrite -bs=16K -size=512M -group_reporting -name=test -numjobs=8 -thread -iodepth=64 > 8)randread: fio -filename=/dev/mmcblk0p72 -direct=1 -rw=randread -bs=16K -size=512M -group_reporting -name=test -numjobs=8 -thread -iodepth=64 > > Wenchao Chen (2): > mmc: queue: replace immediate with hsq->depth > mmc: hsq: dynamic adjustment of hsq->depth > > drivers/mmc/core/queue.c | 6 +----- > drivers/mmc/host/mmc_hsq.c | 28 ++++++++++++++++++++++++++++ > drivers/mmc/host/mmc_hsq.h | 11 +++++++++++ > include/linux/mmc/host.h | 1 + > 4 files changed, 41 insertions(+), 5 deletions(-) > > -- > 2.17.1 >
