On Wednesday 31 March 2010, Jiri Slaby wrote: > On 03/30/2010 10:50 PM, Rafael J. Wysocki wrote: > > So, I definitely would like to see numbers. > > With the patch attached, I get similar results for > uncompressed image -> user.c -> s2disk (compress+threads) > compressed image -> user.c -> s2disk (none of compress+threads) > > BUT note that there are differences in pages _copied_ in the "user.c -> > s2disk" phase. Compression was about 40 %. So in the former case 100000 > pages went through and in the latter one only ~ 38000. So presumably > there will be savings if the pages are compressed in the kernel in the > save-image phase instead of in userspace. > > I'll test (after I hack that up) also the case of image compression when > saving the image and let you know. > > It was tested on a machine with openSUSE factory with init 5 with KDE 4. > The memory consumption was ~ 400M (100000 pages) after boot every time. > Hibernation lasted 12-13s in both cases. So that's pretty much the same and I don't think feeding compressed images to s2disk is not worth the effort. Let's assume s2disk will always receive a raw image (that will make it backwards compatible too). Rafael _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
