Hi! > On Tuesday 25 April 2006 12:31, Rafael J. Wysocki wrote: > > On Tuesday 25 April 2006 12:04, Pavel Machek wrote: > > > > > Okay, so it can be done, and patch does not look too bad. It still > > > > > scares me. Is 800MB image more responsive than 500MB after resume? > > > > > > > > Yes, it is, slightly, but I think 800 meg images are impractical for > > > > performance reasons (like IMO everything above 500 meg with the current > > > > hardware). However this means we can save 80% of RAM with the patch > > > > and that should be 400 meg instead of 250 on a 500 meg machine, or > > > > 200 meg instead of 125 on a 250 meg machine. > > > > > > Could we get few people trying it on such small machines to see if it > > > is really that noticeable? > > > > OK, I'll try to run some tests on a machine with smaller RAM (and slower CPU). > > Done, although it was not so easy to find the box. This was a PII 350MHz w/ > 256 MB of RAM. > > I invented the following test: > - ran KDE with 4 desktops, > - ran Firefox, OpenOffice.org 1.1 (with a simple spreadsheet), and GIMP (with > 2 pictures) each on its own desktop, > - ran the memory meter from the KDE's Info Center and two konsoles > on the remaining desktop - one konsole with a kernel compilation and the > other with a root session used for suspending the box (the built-in swsusp > was used), > so the box's RAM was almost fully occupied with ~30% taken by the page cache. > > Then I suspended the box and measured the time from the start of resume > (ie. leaving GRUB) to the point at which I had all of the application windows > fully rendered on their respective desktops (I always switched the desktops > in the same order, starting from the memory meter's one, through the OOo's > and Firefox's, finishing on the GIMP's one and I always switched the > desktop as soon as the window(s) on it were fully rendered). > > I ran it a couple of times on the 2.6.17-rc1-mm2 kernel with and without > the patch and the results (on the average) are the following: > > (a) 25-28s with the patch > (b) 30-33s without it Ook, thanks for testing. I guess it is ready for -mm when Nick is happy with it ... Pavel -- Thanks for all the (sleeping) penguins.
