try benchmarking with a jaunty live cd mounting you hardy partition so you can test a newer kernel
-- Sebastien E. Le 27 avr. 09 à 20:15, Jason Joines <[email protected]> a écrit : > I have a dell 2550 server that I want to get Ubuntu on. I > tried a > few months ago with the initial 8.04 release and the install was so > slow > I gave up. I had tried the mini.iso cd, desktop cd, server cd, and > alternate cd with the same results. > > Recently I decided to try again with the 8.04.2 media and just > let > it keep running. Instead of assuming it had timed out I would go > check > on it once a day and after many days it was finally installed. As an > example of the slow install, when using the text install and at the > point where the dialog said "Installing the base system" it took 66 > minutes to go from a 33% status to a 39% status. Also, by watching > logs > it seemed that the package retrieval from the internet was really fast > but it became super slow any time it was "unpacking". > > The system has a broadcom1 Gbps nic, two pentium III 933 cpu's, 1 > GB of RAM, three 74 GB u160 scsi drives configured as raid 0 via the > builtin dell raid controller which is using the aacraid module. I've > tried both ext3 and xfs as the filesystem. > > This system was running windows server 2k3 and wasn't noticeably > slow. I also have an identical system that is running Ubuntu 7.10 and > it seems to be over three times as fast via these simple tests: > > 7.10 System running 2.6.22 kernel > dd if=/dev/zero of=gigfile00 bs=1k count=1048576 > 1048576+0 records in > 1048576+0 records out > 1073741824 bytes (1.1 GB) copied, 29.5587 seconds, 36.3 MB/s > > dd if=/dev/zero of=gigfile00 bs=1M count=1024 > 1024+0 records in > 1024+0 records out > 1073741824 bytes (1.1 GB) copied, 29.1349 seconds, 36.9 MB/s > > 8.04.2 System running 2.6.24 kernel > dd if=/dev/zero of=gigfile00 bs=1M count=1024 > 1024+0 records in > 1024+0 records out > 1073741824 bytes (1.1 GB) copied, 98.4516 s, 10.9 MB/s > > dd if=/dev/zero of=gigfile00 bs=1k count=1048576 > 1048576+0 records in > 1048576+0 records out > 1073741824 bytes (1.1 GB) copied, 93.9246 s, 11.4 MB/s > > > I found this bug report > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/249964 about > these > smp systems having the aacraid driver hang under high load. However, > this box isn't under any load and I haven't had any of the log > messages > reported. I decided to try the fix anyway so I recompiled the kernel > after changing: > #define AAC_MAX_32BIT_SGBCOUNT ((unsigned short)256) > to > #define AAC_MAX_32BIT_SGBCOUNT ((unsigned short)127) > in aacraid. It didn't help. > > I also tried disabling smp via "maxcpus=1" in grub. It did > disable > smp but it didn't help. > > Any suggestions? > > > Jason Joines > ================================= > > > > -- > ubuntu-server mailing list > [email protected] > https://lists.ubuntu.com/mailman/listinfo/ubuntu-server > More info: https://wiki.ubuntu.com/ServerTeam -- ubuntu-server mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-server More info: https://wiki.ubuntu.com/ServerTeam
