mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-22 12:32:00 +07:00
f6df8f234e
This patch introduces a sysfs interface readdir_ra to enable/disable readaheading inode block in f2fs_readdir. When readdir_ra is enabled, it improves the performance of "readdir + stat". For 300,000 files: time find /data/test > /dev/null disable readdir_ra: 1m25.69s real 0m01.94s user 0m50.80s system enable readdir_ra: 0m18.55s real 0m00.44s user 0m15.39s system Signed-off-by: Sheng Yong <shengyong1@huawei.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
195 lines
5.6 KiB
Plaintext
195 lines
5.6 KiB
Plaintext
What: /sys/fs/f2fs/<disk>/gc_max_sleep_time
|
|
Date: July 2013
|
|
Contact: "Namjae Jeon" <namjae.jeon@samsung.com>
|
|
Description:
|
|
Controls the maximun sleep time for gc_thread. Time
|
|
is in milliseconds.
|
|
|
|
What: /sys/fs/f2fs/<disk>/gc_min_sleep_time
|
|
Date: July 2013
|
|
Contact: "Namjae Jeon" <namjae.jeon@samsung.com>
|
|
Description:
|
|
Controls the minimum sleep time for gc_thread. Time
|
|
is in milliseconds.
|
|
|
|
What: /sys/fs/f2fs/<disk>/gc_no_gc_sleep_time
|
|
Date: July 2013
|
|
Contact: "Namjae Jeon" <namjae.jeon@samsung.com>
|
|
Description:
|
|
Controls the default sleep time for gc_thread. Time
|
|
is in milliseconds.
|
|
|
|
What: /sys/fs/f2fs/<disk>/gc_idle
|
|
Date: July 2013
|
|
Contact: "Namjae Jeon" <namjae.jeon@samsung.com>
|
|
Description:
|
|
Controls the victim selection policy for garbage collection.
|
|
|
|
What: /sys/fs/f2fs/<disk>/reclaim_segments
|
|
Date: October 2013
|
|
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
|
|
Description:
|
|
Controls the issue rate of segment discard commands.
|
|
|
|
What: /sys/fs/f2fs/<disk>/ipu_policy
|
|
Date: November 2013
|
|
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
|
|
Description:
|
|
Controls the in-place-update policy.
|
|
|
|
What: /sys/fs/f2fs/<disk>/min_ipu_util
|
|
Date: November 2013
|
|
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
|
|
Description:
|
|
Controls the FS utilization condition for the in-place-update
|
|
policies.
|
|
|
|
What: /sys/fs/f2fs/<disk>/min_fsync_blocks
|
|
Date: September 2014
|
|
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
|
|
Description:
|
|
Controls the dirty page count condition for the in-place-update
|
|
policies.
|
|
|
|
What: /sys/fs/f2fs/<disk>/min_hot_blocks
|
|
Date: March 2017
|
|
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
|
|
Description:
|
|
Controls the dirty page count condition for redefining hot data.
|
|
|
|
What: /sys/fs/f2fs/<disk>/min_ssr_sections
|
|
Date: October 2017
|
|
Contact: "Chao Yu" <yuchao0@huawei.com>
|
|
Description:
|
|
Controls the fee section threshold to trigger SSR allocation.
|
|
|
|
What: /sys/fs/f2fs/<disk>/max_small_discards
|
|
Date: November 2013
|
|
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
|
|
Description:
|
|
Controls the issue rate of small discard commands.
|
|
|
|
What: /sys/fs/f2fs/<disk>/discard_granularity
|
|
Date: July 2017
|
|
Contact: "Chao Yu" <yuchao0@huawei.com>
|
|
Description:
|
|
Controls discard granularity of inner discard thread, inner thread
|
|
will not issue discards with size that is smaller than granularity.
|
|
The unit size is one block, now only support configuring in range
|
|
of [1, 512].
|
|
|
|
What: /sys/fs/f2fs/<disk>/max_victim_search
|
|
Date: January 2014
|
|
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
|
|
Description:
|
|
Controls the number of trials to find a victim segment.
|
|
|
|
What: /sys/fs/f2fs/<disk>/dir_level
|
|
Date: March 2014
|
|
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
|
|
Description:
|
|
Controls the directory level for large directory.
|
|
|
|
What: /sys/fs/f2fs/<disk>/ram_thresh
|
|
Date: March 2014
|
|
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
|
|
Description:
|
|
Controls the memory footprint used by f2fs.
|
|
|
|
What: /sys/fs/f2fs/<disk>/batched_trim_sections
|
|
Date: February 2015
|
|
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
|
|
Description:
|
|
Controls the trimming rate in batch mode.
|
|
|
|
What: /sys/fs/f2fs/<disk>/cp_interval
|
|
Date: October 2015
|
|
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
|
|
Description:
|
|
Controls the checkpoint timing.
|
|
|
|
What: /sys/fs/f2fs/<disk>/idle_interval
|
|
Date: January 2016
|
|
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
|
|
Description:
|
|
Controls the idle timing.
|
|
|
|
What: /sys/fs/f2fs/<disk>/iostat_enable
|
|
Date: August 2017
|
|
Contact: "Chao Yu" <yuchao0@huawei.com>
|
|
Description:
|
|
Controls to enable/disable IO stat.
|
|
|
|
What: /sys/fs/f2fs/<disk>/ra_nid_pages
|
|
Date: October 2015
|
|
Contact: "Chao Yu" <chao2.yu@samsung.com>
|
|
Description:
|
|
Controls the count of nid pages to be readaheaded.
|
|
|
|
What: /sys/fs/f2fs/<disk>/dirty_nats_ratio
|
|
Date: January 2016
|
|
Contact: "Chao Yu" <chao2.yu@samsung.com>
|
|
Description:
|
|
Controls dirty nat entries ratio threshold, if current
|
|
ratio exceeds configured threshold, checkpoint will
|
|
be triggered for flushing dirty nat entries.
|
|
|
|
What: /sys/fs/f2fs/<disk>/lifetime_write_kbytes
|
|
Date: January 2016
|
|
Contact: "Shuoran Liu" <liushuoran@huawei.com>
|
|
Description:
|
|
Shows total written kbytes issued to disk.
|
|
|
|
What: /sys/fs/f2fs/<disk>/feature
|
|
Date: July 2017
|
|
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
|
|
Description:
|
|
Shows all enabled features in current device.
|
|
|
|
What: /sys/fs/f2fs/<disk>/inject_rate
|
|
Date: May 2016
|
|
Contact: "Sheng Yong" <shengyong1@huawei.com>
|
|
Description:
|
|
Controls the injection rate.
|
|
|
|
What: /sys/fs/f2fs/<disk>/inject_type
|
|
Date: May 2016
|
|
Contact: "Sheng Yong" <shengyong1@huawei.com>
|
|
Description:
|
|
Controls the injection type.
|
|
|
|
What: /sys/fs/f2fs/<disk>/reserved_blocks
|
|
Date: June 2017
|
|
Contact: "Chao Yu" <yuchao0@huawei.com>
|
|
Description:
|
|
Controls target reserved blocks in system, the threshold
|
|
is soft, it could exceed current available user space.
|
|
|
|
What: /sys/fs/f2fs/<disk>/current_reserved_blocks
|
|
Date: October 2017
|
|
Contact: "Yunlong Song" <yunlong.song@huawei.com>
|
|
Contact: "Chao Yu" <yuchao0@huawei.com>
|
|
Description:
|
|
Shows current reserved blocks in system, it may be temporarily
|
|
smaller than target_reserved_blocks, but will gradually
|
|
increase to target_reserved_blocks when more free blocks are
|
|
freed by user later.
|
|
|
|
What: /sys/fs/f2fs/<disk>/gc_urgent
|
|
Date: August 2017
|
|
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
|
|
Description:
|
|
Do background GC agressively
|
|
|
|
What: /sys/fs/f2fs/<disk>/gc_urgent_sleep_time
|
|
Date: August 2017
|
|
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
|
|
Description:
|
|
Controls sleep time of GC urgent mode
|
|
|
|
What: /sys/fs/f2fs/<disk>/readdir_ra
|
|
Date: November 2017
|
|
Contact: "Sheng Yong" <shengyong1@huawei.com>
|
|
Description:
|
|
Controls readahead inode block in readdir.
|