On Fri, Oct 24, 2008 at 10:53:20AM -0700, Linus Torvalds wrote: > > echo 1 >/proc/sys/vm/drop_caches > > Use "echo 3" instead of "1". > > It's actually a bitmask, with bit 0 being "data" (pagecache) and bit 1 > being "metadata" (inodes and directory caches). > > And since git (or any SCM) is very metadata-intensive, you really should > make sure to drop metadata too, otherwise your caches won't be really very > cold at all. > > (But it obviously depends on the operation you're testing - some are more > about the inodes and directories, others are about file data access). Ah, thanks. In this case, he was interested in walking the directory tree, so the metadata caching was indeed very important. -Peff -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
