[Bugme-new] [Bug 6664] New: Linux performs poorly at copying large files between partitions on nForce 3 motherboard

bugme-daemon at bugzilla.kernel.org bugme-daemon at bugzilla.kernel.org
Thu Jun 8 03:38:18 PDT 2006


http://bugzilla.kernel.org/show_bug.cgi?id=6664

           Summary: Linux performs poorly at copying large files between
                    partitions on nForce 3 motherboard
    Kernel Version: 2.6.16.19
            Status: NEW
          Severity: normal
             Owner: bzolnier at gmail.com
         Submitter: t.artem at mailcity.com


Most recent kernel where this bug did not occur: not known
Distribution: FC5
Hardware Environment: CPU Sempron 3400; GigaByte K8NS Pro Motherboard; nForce3
250GB chipset; Two HDD on the same IDE channel; Two SATA drives
Software Environment:
Problem Description:

1) Copying a large file between two HDD with newly created empty FAT32
partitions on the same IDE channel gives these results (Linux runned with no
background tasks, i.e. with zero CPU load):

Windows XP SP2 with nVidia IDE drivers: ~33Mb/sec (CPU usage ~ 15%)
Linux: ~22Mb/sec (CPU usage ~ 10%)

2) The same situation but two SATA drives (empty FAT32 partitions)

Windows XP SP2 with nVidia IDE drivers: ~38Mb/sec
Linux: ~27Mb/sec

P.S. File reading on the both drives gives an average 55Mb/s throughput

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