Hi. Here are the stats:
1GB P4, 2.6.11+Suspend2 2.1.8. Soft image size limit set to 2MB to emulate Pavel's implementation (eat as much memory as we can). Without patch: Freed 16545 pages in 4000 jiffies = 16.16 MB/s Freed 83281 pages in 14060 jiffies = 23.14 MB/s Freed 237754 pages in 41482 jiffies = 22.39 MB/s With patch: Freed 52257 pages in 6700 jiffies = 30.46 MB/s Freed 105693 pages in 11035 jiffies = 37.41 MB/s Freed 239007 pages in 18284 jiffies = 51.06 MB/s With a less aggressive image size limit (200MB): Without the patch: Freed 14600 pages in 1749 jiffies = 32.61 MB/s (Anomolous!) Freed 88563 pages in 14719 jiffies = 23.50 MB/s Freed 205734 pages in 32389 jiffies = 24.81 MB/s With the patch: Freed 68252 pages in 496 jiffies = 537.52 MB/s Freed 116464 pages in 569 jiffies = 798.54 MB/s Freed 209699 pages in 705 jiffies = 1161.89 MB/s The later pages take more work to get, which accounts for the slower MB/s with smaller numbers of pages to free. Without the patch, though, getting the easier pages also takes longer because we do a far greater number of invocations of shrink_all_memory in order to get the same number of pages. Regards, Nigel On Thu, 2005-03-03 at 22:26, Andrew Morton wrote: > Nigel Cunningham <[EMAIL PROTECTED]> wrote: > > > > Here's a patch I've prepared which improves the speed at which memory is > > freed prior to suspend. It should be a big gain for swsusp. > > Patch is simple enough but, as always, please back up an optimization patch > with quantitative test results. -- Nigel Cunningham Software Engineer, Canberra, Australia http://www.cyclades.com Bus: +61 (2) 6291 9554; Hme: +61 (2) 6292 8028; Mob: +61 (417) 100 574 Maintainer of Suspend2 Kernel Patches http://softwaresuspend.berlios.de - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
