[Bug 606336] New: Bad responsiveness and high CPU load in the time of i/o operations
http://bugzilla.novell.com/show_bug.cgi?id=606336 http://bugzilla.novell.com/show_bug.cgi?id=606336#c0 Summary: Bad responsiveness and high CPU load in the time of i/o operations Classification: openSUSE Product: openSUSE 11.3 Version: Milestone 6 Platform: x86-64 OS/Version: openSUSE 11.3 Status: NEW Severity: Major Priority: P5 - None Component: Kernel AssignedTo: kernel-maintainers@forge.provo.novell.com ReportedBy: dmitry@roshchin.org QAContact: qa@suse.de Found By: --- Blocker: --- User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; ru; rv:1.9.2.3) Gecko/20100401 SUSE/3.6.3-1.2 Firefox/3.6.3 There are high CPU load (around 80-100% of all processor cores), slow write performance and bad GUI responsiveness in the time of large i/o operations. It happens when copying many small files or one large file(around several gigabytes) from one hard disk to other or inside one hard disk. My system: CPU Intel E7200 4 GB memory southbridge Intel ICH9R 3 hdd Hitachi (SATA2, AHCI mode) openSUSE 11.2 , 11.3m6 (with KDE4) ext4 file system on all hard disks Reproducible: Always -- Configure bugmail: http://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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Igor Strelnikoff
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--- Comment #2 from Igor Strelnikoff
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--- Comment #3 from Igor Strelnikoff
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Jiri Slaby
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--- Comment #5 from Dmitry Roshchin
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--- Comment #6 from Jiri Slaby
It seems, that GUI responsiveness is better, but CPU load as before high.
Could you use perf to track where the cpus are wasting their time? And what processes you see in 'top' output when this happens? -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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Jiri Slaby
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