• Hirofumi Ogawa's avatar
    [PATCH] FAT cluster chain cache per inode (5/5) · 47c872b3
    Hirofumi Ogawa authored
    This adds a cache of lastest accessed cluster to inode for sequential
    access.
    
    The following is 500M file of FAT-to-FAT copy test, this may be a most
    different case in usual operations, because maximum readahead window
    flush the all caches.
    
    512 bytes blocksize, 4096 bytes cluster size.
    
    linux-2.5.69-bk12
    	root@devron (a)[1232]# time cp file file1
    
    	real    7m58.900s
    	user    0m0.267s
    	sys     6m44.258s
    
    linux-2.5.69-bk12+patch
    	root@devron (a)[1576]# time cp file file1
    
    	real    2m44.309s
    	user    0m0.270s
    	sys     0m28.631s
    47c872b3
cache.c 9.84 KB