[Bug 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
** Changed in: linux (Ubuntu) Assignee: Jim Lieb (lieb) = (unassigned) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/343371 Title: Very poor desktop response (high latency) during I/O-load with SATA+NCQ To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/343371/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
This bug affects me (10.10, 64bit) and has done so for a long time (at least 2 releases). When having many tabs opened in google chrome (swap), compiling large projects or updating git repositories which requires disk-io, system becomes unusable (may take 15-200 seconds for mouse pointer to move from one end of screen to the next), system clock at top corner (gnome) slows down to a stand-still, all windows are greyed out etc. This happens on both my laptops: laptop 1) centrino duo, 4gb ram, ssd with bad controller (low iops, performance) 2.6.32 kernel laptop 2) core i5, 3gb ram, normal harddrive. 2.6.37 kernel Both laptops use luks to encrypt whole root-partition + swap. Is there anything I can do to help here? (I'm a developer) Cheers, Daniel -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/343371 Title: Very poor desktop response (high latency) during I/O-load with SATA+NCQ -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
Looking at the attachments in this bug report, I noticed that lspci -vv was flagged as a patch. A patch contains changes to an Ubuntu package that will resolve a bug, since this was not one I've unchecked the patch flag for it. In the future keep in mind the definition of a patch. You can learn more about what qualifies as a patch at https://wiki.ubuntu.com/Bugs/Patches. Thanks! -- Very poor desktop response (high latency) during I/O-load with SATA+NCQ https://bugs.launchpad.net/bugs/343371 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 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
I'll be adding some test results for Ubuntu Lucid here, as soon as I can find some time. -- Very poor desktop response (high latency) during I/O-load with SATA+NCQ https://bugs.launchpad.net/bugs/343371 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
Re: [Bug 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
Laurent Duchesne l...@urent.org writes: I can confirm I had the same problem with 2.6.31-18 (ICH7 chipset). After following these instructions to upgrade the kernel to 2.6.32, everything works fine: http://www.ramoonus.nl/2009/12/03/linux-kernel-2-6-32-installation-guide-for-ubuntu-linux/ The mouse doesn't freeze anymore and apps are still responsive even when under heavy IO load. Kernel 2.6.32 helped the situation, definitely. But unfortunately I ran into som other compatibility problems with both PPA mainline-versions and custom-compiled versions from upstream (missing App-armor, somewhat strange/altered fs-mounting-behaviour at boot, readahead not working, extremely slow hibernation). In the end I decided to stick to the 2.6.31-based kernels distributed with Ubuntu Karmic. I guess things will get better when Lucid comes around.. -- Very poor desktop response (high latency) during I/O-load with SATA+NCQ https://bugs.launchpad.net/bugs/343371 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 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
Thank you for the tip, I will try kernel 2.6.32.3 from the Ubuntu kernel team's mainline-PPA and report back. -- Very poor desktop response (high latency) during I/O-load with SATA+NCQ https://bugs.launchpad.net/bugs/343371 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 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
I can confirm I had the same problem with 2.6.31-18 (ICH7 chipset). After following these instructions to upgrade the kernel to 2.6.32, everything works fine: http://www.ramoonus.nl/2009/12/03/linux-kernel-2-6-32-installation-guide-for-ubuntu-linux/ The mouse doesn't freeze anymore and apps are still responsive even when under heavy IO load. -- Very poor desktop response (high latency) during I/O-load with SATA+NCQ https://bugs.launchpad.net/bugs/343371 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 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
Arrg! Same issue here coupled with the slow SATA performance bug: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/119730 Started happening for me with Hardy Heron about 1.5 years ago. Now running up-to-date Karmic with same issue. Lenovo T61 1GB DDR2 667 500GB Seagate SATA2 ST9500420AS 2.6.31-16-generic SMP x86_64 As soon as my system swaps, the UI becomes unusable. Trying other IO schedulers. -- Very poor desktop response (high latency) during I/O-load with SATA+NCQ https://bugs.launchpad.net/bugs/343371 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 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
Hi, I've been running Ubuntu 9.10 for a while now (currently on kernel 2.6.31-17.54). The problem with high I/O latencies during write-load persists, even after migrating all partitions to the EXT4 file system. The hardware is still the same as when I reported this bug originally. Again, to reiterate for Karmic, the issue typically appears when I run some process in the background that writes a lot out to disk (typical for audio/video work, etc), and then try to use my desktop for other things while this is going on. Firefox grinds to a halt immediately the first time it tries to do som disk I/O. And I have to wait for too long before I gets responsive again. This is a 64bit quad-core system with 8GB RAM, so there's plenty of resources. The symptoms are exactly the same as they were for Jaunty: all in all the disks and system is configured and running OK with good throughput performance, but the latency is just horrible at times. -- Very poor desktop response (high latency) during I/O-load with SATA+NCQ https://bugs.launchpad.net/bugs/343371 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 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
This is probably what I'm seeing: http://bugzilla.kernel.org/show_bug.cgi?id=12309 However, it looks like the most promising patch is only available from 2.6.32+. ** Bug watch added: Linux Kernel Bug Tracker #12309 http://bugzilla.kernel.org/show_bug.cgi?id=12309 -- Very poor desktop response (high latency) during I/O-load with SATA+NCQ https://bugs.launchpad.net/bugs/343371 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 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
This bug may be a duplicate of #131094 even though I have not marked it as such (yet). See the comment at https://bugs.launchpad.net/ubuntu/+source/linux/+bug/131094/comments/235 and test your workload against it. Note that this has been a workload sensitive problem. You may have another problem further into the I/O subsystem but eliminating this issue should be the first step, i.e. if we eliminate the I/O from VM thrashing, NCQ etc. become less of an issue. If you have further problems as indicated in earlier comments, we can then pursue potential problems in the SATA layer. Thank you. ** Changed in: linux (Ubuntu) Status: Confirmed = Incomplete ** Changed in: linux (Ubuntu) Assignee: (unassigned) = Jim Lieb (lieb) -- Very poor desktop response (high latency) during I/O-load with SATA+NCQ https://bugs.launchpad.net/bugs/343371 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 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
I've same issue on my laptop. Some information : $ uname --all Linux stephane-macbook 2.6.28-13-generic #44-Ubuntu SMP Tue Jun 2 07:57:31 UTC 2009 i686 GNU/Linux Do you need other information ? Is it an ubuntu bug or kernel bug ? If the last, may be we can found this bug in kernel bugzilla ? Regards, Stephane ** Attachment added: lspci -vv http://launchpadlibrarian.net/28608283/lspci.txt -- Very poor desktop response (high latency) during I/O-load with SATA+NCQ https://bugs.launchpad.net/bugs/343371 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 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
echo 1 queue_depth was not enought in my case. What you see in queue_type when you do that? simple, none or something else? I resolved it adding my hd (WDC WD3200BEVT-22ZCT0) in the NCQ blacklist in drivers/ata/libata-core.c and now I can read very big files from the disk without any problem... After some test I think 381300 is something different and you can ignore it... -- Very poor desktop response (high latency) during I/O-load with SATA+NCQ https://bugs.launchpad.net/bugs/343371 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 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
take a look at bug 381300! please boot with elevator=noop and try if the problem persist... -- Very poor desktop response (high latency) during I/O-load with SATA+NCQ https://bugs.launchpad.net/bugs/343371 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 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
Still a problem in Ubuntu Jaunty with all filesystems converted to EXT4. Copying 6-7 GB from one place on a partition to another place on the same partition (i.e. duplicating the data on the same harddrive) results in extreme I/O latencies, and things like starting up Firefox while copy operation is going is totally impossible. It seems that latency on Linux suffers badly whenever there is heavy writing, the in I/O scheduler is not up for the job of providing an OK desktop experience. -- Very poor desktop response (high latency) during I/O-load with SATA+NCQ https://bugs.launchpad.net/bugs/343371 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 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
I had a problem with a sata disk under heavy I/O ... response time degraded when loading/starting new applications (... until the disk finally freezed). I solved my problem by fine tunning the pdflush parameters... Monitor the Dirty values in cat /proc/meminfo ... if the values remain high (... are not cleaned frequently enough) then the problem might be the pdflush configuration. If the problem is the pdflush then check this link : https://bugs.launchpad.net/ubuntu/+bug/270794/comments/12 ... I hope it helps. -- Very poor desktop response (high latency) during I/O-load with SATA+NCQ https://bugs.launchpad.net/bugs/343371 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 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
*** This bug is a duplicate of bug 270794 *** https://bugs.launchpad.net/bugs/270794 I'll check it out and if that's the problem, I'll mark this bug a duplicate of the other. qwerty wrote: I had a problem with a sata disk under heavy I/O ... response time degraded when loading/starting new applications (... until the disk finally freezed). I solved my problem by fine tunning the pdflush parameters... Monitor the Dirty values in cat /proc/meminfo ... if the values remain high (... are not cleaned frequently enough) then the problem might be the pdflush configuration. If the problem is the pdflush then check this link : https://bugs.launchpad.net/ubuntu/+bug/270794/comments/12 ... I hope it helps. ** This bug has been marked a duplicate of bug 270794 2.6.24-19-generic libata soft resetting link every 30 secs when under heavy load -- Very poor desktop response (high latency) during I/O-load with SATA+NCQ https://bugs.launchpad.net/bugs/343371 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 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
*** This bug is a duplicate of bug 270794 *** https://bugs.launchpad.net/bugs/270794 @qwerty: Thanks for the hint, but I think it is not related. I don't have problems with the disk or controller under high load, only with the general latency of the system. So, this is not a duplicate of bug 270794. The kernel version there is different (2.6.24), and like I stated, I've never had any stability problems with the SATA controller, nor the hard-drive. It never soft- resets itself and generally works very reliably. This is purely a latency problem, not anything going wrong, controller reset, kernel log errors, etc. -- Very poor desktop response (high latency) during I/O-load with SATA+NCQ https://bugs.launchpad.net/bugs/343371 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 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
** This bug is no longer a duplicate of bug 270794 2.6.24-19-generic libata soft resetting link every 30 secs when under heavy load -- Very poor desktop response (high latency) during I/O-load with SATA+NCQ https://bugs.launchpad.net/bugs/343371 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 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
Attaching some latencytop output while doing a large read .. ** Attachment added: latencytop.log http://launchpadlibrarian.net/23950515/latencytop.log -- Very poor desktop response (high latency) during I/O-load with SATA+NCQ https://bugs.launchpad.net/bugs/343371 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
Re: [Bug 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
Excellent, thank you. Øyvind Stegard wrote: Attaching some latencytop output while doing a large read .. ** Attachment added: latencytop.log http://launchpadlibrarian.net/23950515/latencytop.log -- Very poor desktop response (high latency) during I/O-load with SATA+NCQ https://bugs.launchpad.net/bugs/343371 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 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
** Attachment added: Kernel log from boot http://launchpadlibrarian.net/23891945/dmesg -- Very poor desktop response (high latency) during I/O-load with SATA+NCQ https://bugs.launchpad.net/bugs/343371 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 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
** Attachment added: Output of command 'lspci -vv' http://launchpadlibrarian.net/23891954/lspci.txt -- Very poor desktop response (high latency) during I/O-load with SATA+NCQ https://bugs.launchpad.net/bugs/343371 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 343371] Re: Very poor desktop response (high latency) during I/O-load with SATA+NCQ
Thank you for reporting this problem. It helps us make Ubuntu better. Would you please follow this link (http://www.howtoforge.com/measuring- linux-latency-with-latencytop-on-ubuntu-8.10-and-debian-lenny) and give us the results? It could be very useful info to help us help you. ** Changed in: linux (Ubuntu) Status: New = Confirmed -- Very poor desktop response (high latency) during I/O-load with SATA+NCQ https://bugs.launchpad.net/bugs/343371 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
