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| author |   Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-01-18 14:54:13 +0900 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-01-22 10:48:59 +0900 |
| commit | a7fdffbd3ea4b3cc2993af006bde38a423b38b72 (patch) | |
| tree | 4d642d76fa47af5514eca7be710b1f8c063cd637 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | f2fs: support swapfile (diff) | |
| download | linux-dev-a7fdffbd3ea4b3cc2993af006bde38a423b38b72.tar.xz linux-dev-a7fdffbd3ea4b3cc2993af006bde38a423b38b72.zip | |
f2fs: avoid issuing small bios due to several dirty node pages
If some small bios of dirty node pages are supposed to be issued during the
sequential data writes, there-in well-produced consecutive data bios are able
to be split by the small node bios, resulting in performance degradation.
So, let's collect a number of dirty node pages until reaching a threshold.
And, by default, I set the threshold as 2MB, a segment size.
This improves sequential write performance on i5, 512GB SSD (830 w/ SATA2) as
follows.
Before: 231 MB/s -> After: 255 MB/s
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Reviewed-by: Namjae Jeon <namjae.jeon@samsung.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions