On Fri, 2006-03-17 at 01:14 -0500, fedora-test-list-request@xxxxxxxxxx wrote: > The Firefox browser often takes 15 seconds to start because random > placement > of the vDSO page disrupts the pre-linking of the 133 shared libraries > involved. > (Fedora Core 5 Test 3, kernel-2.6.15-1.2054_FC5, updated by yum to > today, > 1.1GHz Athlon Plain, 768MB RAM, ext3 UDMA100 local disk.) Similar > delays > are encountered by any application that uses many or large shared > libraries. > > In contrast, Firefox always starts in 5 seconds or less on a kernel > which places > the vDSO intelligently: just below the .text of ld-linux or the main > executable. > This preserves the benefits of exec-shield (including randomization, > when prelink > randomizes) without destroying performance. > > Want to experience the difference for yourself? These two kernels > have > only my patch applied on top of what will be released Monday as Fedora > Core 5: > (14MB) > http://bitwagon.com/ftp/kernel-2.6.15-1.2054_FC5.jreiser.i686.rpm > I don't see much here. I get 8-10s to start firefox the first time after boot, 2-3s after that (2GHz Centrino, 1Gb ram, ext3 sata disk) with either kernel. For oodraw it is 13s first time, 3s subsequently. Immediately after running prelink the first-start time drop maybe 20%, but reboot and that disappears. I don't see any significant improvement... Bill -- fedora-test-list mailing list fedora-test-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-test-list