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| author | OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> | 2008-11-06 12:53:49 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-11-06 15:41:20 -0800 |
| commit | d3dfa8228f87ab9960ab8b4718013d68e3c25a43 (patch) | |
| tree | 236784875a5c735688e644fe8412649e5fdbfcd7 /include/asm-mn10300/dmactl-regs.h | |
| parent | 52e9d9f4b32a3bec91feb76c84e37b7dcffe5040 (diff) | |
| download | talos-op-linux-d3dfa8228f87ab9960ab8b4718013d68e3c25a43.tar.gz talos-op-linux-d3dfa8228f87ab9960ab8b4718013d68e3c25a43.zip | |
fat: improve fat_hash()
fat_hash() is using the algorithm known as bad. Instead of it, this
uses hash_32(). The following is the summary of test.
old hash:
hash func (1000 times): 33489 cycles
total inodes in hash table: 70926
largest bucket contains: 696
smallest bucket contains: 54
new hash:
hash func (1000 times): 33129 cycles
total inodes in hash table: 70926
largest bucket contains: 315
smallest bucket contains: 236
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-mn10300/dmactl-regs.h')
0 files changed, 0 insertions, 0 deletions
