On 5/12/25 15:36, yohan.joung wrote: > when performing buffered writes in a large section, > overhead is incurred due to the iteration through > ckpt_valid_blocks within the section. > when SEGS_PER_SEC is 128, this overhead accounts for 20% within > the f2fs_write_single_data_page routine. > as the size of the section increases, the overhead also grows. > to handle this problem ckpt_valid_blocks is > added within the section entries. > > Test > insmod null_blk.ko nr_devices=1 completion_nsec=1 submit_queues=8 > hw_queue_depth=64 max_sectors=512 bs=4096 memory_backed=1 > make_f2fs /dev/block/nullb0 > make_f2fs -s 128 /dev/block/nullb0 > fio --bs=512k --size=1536M --rw=write --name=1 > --filename=/mnt/test_dir/seq_write > --ioengine=io_uring --iodepth=64 --end_fsync=1 > > before > SEGS_PER_SEC 1 > 2556MiB/s > SEGS_PER_SEC 128 > 2145MiB/s > > after > SEGS_PER_SEC 1 > 2556MiB/s > SEGS_PER_SEC 128 > 2556MiB/s > > Signed-off-by: yohan.joung <yohan.jo...@sk.com>
Reviewed-by: Chao Yu <c...@kernel.org> Thanks, _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
