On Tue, Feb 12, 2013 at 6:29 PM, Lennart Poettering <lenn...@poettering.net> wrote: > On Mon, 11.02.13 12:34, Gary van der Merwe (gary...@gmail.com) wrote: >> This is my first post to this list, so I just want to say I thank you >> too all those >> who wrote systemd. >> >> systemd-readahead-replay does not seem to be doing what it should. >> >> Bootchart with readahead-[replay|collect] enabled: >> http://www.garyvdm.co.za/bootchart-20130211-1328.svg > > You are aware that you need to boot at least twice after removing the > readahead file before measuring anything like this?
looking at the graph, there are 2 systemd-reada[snip] processes showing up, which are the replay and collector threads - so from a first glance, the replay thread is running and spending quite some time (10+ seconds) doing stuff if he had no /.readahead file, it would exit immediately... so I think there's an actual problem here. > It might be nice of bootchart would draw the IO utilization per-process > into the bar. That way we could directly see how much IO it actually > generates... it's been on my wish list for a while, but I've not had time to figure out if we can get this cheaply... should make some time to dig into that. Auke _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
