On Thu, 2011-12-29 at 01:25 +0100, Samuel Thibault wrote: > Hello, > > I've done some stat-based kernel profiling (I'll have to post how to do > it on the wiki sometime) on ext2fs doing nothing more than > > while true; do rm -f blop ; \cp -f blip blop ; done
> It might be biaised by the clock not being able to tick everywhere in > the kernel (though I guess e.g. most of the IPC machinery is running at > ipl0?), but I believe it's still a bit revealing: I had already noticed > that ext2fs spends most of its time in the kernel (like 90%), and it > here seems we're spending a lot of time just managing the ext2fs thread > sleeps (no, there aren't many threads in that test, just two dozen). It's hard to relate these numbers without comparison: What are the corresponding numbers for Linux/kFreeBSD?
