[Bug 113532] Re: kernel 2.6.20 disk write performance much slower than 2.6.17
changing package to linux-source-2.6.24 (from linux-source.2.6.20) ** Changed in: linux (Ubuntu) Sourcepackagename: linux-source-2.6.20 = linux -- 3ware kernel driver 2.6.20 - 2.6.24 disk write performance extremely slow. https://bugs.launchpad.net/bugs/113532 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 113532] Re: kernel 2.6.20 disk write performance much slower than 2.6.17
Upgrade to Gutsy if you can, and consider Hardy once it's stable... Hardy+1 may even be the best release we'll have seen in a while, since Linus has given kernel 2.6.25 a coveted weasel series name: http://kerneltrap.org/Linux/2.6.25-rc2_A_Winner Unfortunately I doubt we'll see 2.6.25 in Hardy. -- kernel 2.6.20 disk write performance much slower than 2.6.17 https://bugs.launchpad.net/bugs/113532 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 113532] Re: kernel 2.6.20 disk write performance much slower than 2.6.17
So, Does anybody knows any solution ? -- kernel 2.6.20 disk write performance much slower than 2.6.17 https://bugs.launchpad.net/bugs/113532 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 113532] Re: kernel 2.6.20 disk write performance much slower than 2.6.17
Some colleagues of mine reported that disk io performance of Ubuntu 7.10 (ie, kernel 2.6.22) was much nearer that of 6.10. Basically, Ubuntu 7.04, or more accurately, kernel 2.6.20, was a bit of a lemon. -- kernel 2.6.20 disk write performance much slower than 2.6.17 https://bugs.launchpad.net/bugs/113532 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 113532] Re: kernel 2.6.20 disk write performance much slower than 2.6.17
Hello Guys, Does anybody thinking about solving a problem ? I would like to migrate from 6.10 to 7.10 and i can't because of using as VMware Server guest my corporate win xp. Any answer will be better than no answer... :) h. -- kernel 2.6.20 disk write performance much slower than 2.6.17 https://bugs.launchpad.net/bugs/113532 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 113532] Re: kernel 2.6.20 disk write performance much slower than 2.6.17
I am assigning this bug to the 'ubuntu-kernel-team' per their bug policy. For future reference you can learn more about their bug policy at https://wiki.ubuntu.com/KernelTeamBugPolicies . ** Changed in: linux-source-2.6.20 (Ubuntu) Assignee: (unassigned) = Ubuntu Kernel Team (ubuntu-kernel-team) -- kernel 2.6.20 disk write performance much slower than 2.6.17 https://bugs.launchpad.net/bugs/113532 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 113532] Re: kernel 2.6.20 disk write performance much slower than 2.6.17
It seems that the problem may be related to the fact that the IDE drives are now handled by the SATA drivers and thus in some cases hdparm can't set options correctly on some drives. As i said i have 2 IDE drives in my computer one issue slow down the other not so feel free to ask me any output that would help you to find what is the configuration option which make the second hard drives to work slowly. For the record some have noticed also this slow down on suse with the kernel 2.6.20 so there's really something with the way the 2.6.20 kernel is handling IDE drives. Hope this can be improved and a workaround released. -- kernel 2.6.20 disk write performance much slower than 2.6.17 https://bugs.launchpad.net/bugs/113532 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 113532] Re: kernel 2.6.20 disk write performance much slower than 2.6.17
** Changed in: linux-source-2.6.20 (Ubuntu) Status: New = Confirmed -- kernel 2.6.20 disk write performance much slower than 2.6.17 https://bugs.launchpad.net/bugs/113532 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 113532] Re: kernel 2.6.20 disk write performance much slower than 2.6.17
I wouldn't be in too much of a hurry to blame libata, since I first noticed the problem with a 3ware SATA RAID card (model 9650SE). -- kernel 2.6.20 disk write performance much slower than 2.6.17 https://bugs.launchpad.net/bugs/113532 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 113532] Re: kernel 2.6.20 disk write performance much slower than 2.6.17
I have similar problems with 2.6.20-16 kernel. I have 2 IDE drives one issues slowdown the other not. It really sound like a kernel issue because i never observed slowdown before on this drive. -- kernel 2.6.20 disk write performance much slower than 2.6.17 https://bugs.launchpad.net/bugs/113532 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 113532] Re: kernel 2.6.20 disk write performance much slower than 2.6.17
Same here. I was running Ubuntu 6.10, and everything worked fine. Then, after upgrading to 7.10, VMware began to run slow due to excessive hard disk activity. I recorded some statistical data with dstat when starting up a virtual machine and I get about 50% of cpu wait on computer. See http://tinyurl.com/2ng4tz I've got a Athlon 64 X2 Dual Core with a Western Digital Raptor SATA hard drive and 2 GB RAM. I'm using VMware Workstation 5.5.4. -- kernel 2.6.20 disk write performance much slower than 2.6.17 https://bugs.launchpad.net/bugs/113532 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 113532] Re: kernel 2.6.20 disk write performance much slower than 2.6.17
Thanks for the information and graphs Stephan. I'm glad I'm not the only one seeing these problems. There's also a thread on VMware's forums about this: http://www.vmware.com/community/thread.jspa?threadID=83459 So is this purely a kernel issue, that should be apparent when running loads other than VMware? Or does it only surface when running VMware? I'm not an expert, but I expect the vmmon module hooks in fairly deep into the kernel. I suppose it's possible that if VMware haven't done much testing against recent kernels, their module(s) may be the cause of these slowdowns. So far I haven't really noticed any problems running Feisty and non- VMware loads, but it's possible I'm just not exposing it to a high enough thread workload. -- kernel 2.6.20 disk write performance much slower than 2.6.17 https://bugs.launchpad.net/bugs/113532 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 113532] Re: kernel 2.6.20 disk write performance much slower than 2.6.17
This bug does not appear to be Ubuntu-specific. I set up the same test rig with Debian 4.0, running kernel 2.6.18, and the performance was acceptable. When I upgraded the kernel to 2.6.20, performance suffered in a similar way as with the Ubuntu 7.04 setup. Disk write performance under 2.6.20 may be slightly faster when no other processes are running, on some boxes. But as soon as the box becomes loaded up, performance degrades much more quickly with 2.6.20 than with 2.6.18 or earlier kernels. This is not very useful for a server role. -- kernel 2.6.20 disk write performance much slower than 2.6.17 https://bugs.launchpad.net/bugs/113532 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 113532] Re: kernel 2.6.20 disk write performance much slower than 2.6.17
These benchmarks demonstrate the marked difference when running VMware on Feisty. Ubuntu 7.04, 2.6.20-15-server, i386, VMware 1.0.3, 14 guests running, Ubuntu-packaged vmmon/vmnet Version 1.03 --Sequential Output-- --Sequential Input- --Random- -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- MachineSize K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP ziggy32G 51084 23 21469 10 92143 20 145.7 4 Ubuntu 6.10, 2.6.17-11-server, i386, VMware 1.0.3, 14 guests running Version 1.03 --Sequential Output-- --Sequential Input- --Random- -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- MachineSize K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP ziggy32G 105453 41 44506 20 109565 21 230.6 1 ** Note ** I am not suggesting this problem is VMware related, since the performance degradation is observable on a box with no VMware running (ie, no load at all). Running VMware is the role of these servers however, and is one of the easiest ways to load up the box with a real world load. -- kernel 2.6.20 disk write performance much slower than 2.6.17 https://bugs.launchpad.net/bugs/113532 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
