On Fri, Apr 17, 2009 at 11:39:06PM +0530, Amit Shah wrote: > # 4GiB file, kernel 9f76208c33984ab777eace5d07a4e36e88703e02 + ext3-guarded > > filesystem posix-fallocate mmap chunk-4096 chunk-8192 > ext3-guarded 85 97 459 90 > ext3-writeback 86 95 140 94 > ext3-ordered 86 96 277 95 > > Running the test in single user mode, I get the following results: > > # 4GiB file, kernel 9f76208c33984ab777eace5d07a4e36e88703e02 + ext3-guarded > > filesystem posix-fallocate mmap chunk-4096 chunk-8192 > ext3-guarded 84 86 163 91 > ext3-writeback 84 88 217 91 > ext3-ordered 84 86 226 91 The difference between guarded and writeback in chunk-4096 looking at your desktop timings and your single user times is.... surprising. In particular, the fact that the guarded time is 3 times longer than ext3-writeback when the desktop is running, and 20% faster in single user mode. Are these results reproducible? And do you have any thoughts as to what might be causing them? - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
