I used the IDE disk driver with a MAXTOR drive.
Jeff
Roger Larsson wrote:
>
> Hi,
>
> Is it anybody who can explain why ide_delay_50ms is run during this
> test?
> Did a ide module get dynamically loaded? (since it should only be used
> during probing)
>
> A large share of the time is spent in this function - doing nothing...
> [If it would at least reschedule when needed (need_resched)...
> Ingo added due to this]
>
> /RogerL
>
> "Jeff V. Merkey" wrote:
> >
> > Alexander Viro wrote:
> > >
> > >
> > > It's not necessarily bad. I'ld love to look at the whole picture - right
> > > now the whole lookup mechanism is in the middle of a sequence of changes
> > > and timings definitely _will_ change several times before it will settle
> > > down. Jeff, care to email the results of profiling you've got?
> > >
> >
> > Al,
> >
> > Here's the results for two runs of 165 MB of files copied from a NetWare
> > Partition to Another NetWare Partition on 2.2.15 and 2.3.99 and another
> > copy from an EXT2 partition to a NetWare partition (both copies were run
> > concurrently for each Linux version). Both perform very well, but
> > 2.2.15 is slightly faster on raw I/O. If you are doing stuff with
> > cached files, 2.3.99 is faster (like just reading from page cache).
> >
> > You may see something that will indicate where the problem lies. I
> > noticed a lot more paging activity on 2.4, so perhaps the extra page
> > faults are causing some performance issues. Task Gates are very heavy
> > on Intel systems, as are interrupts and exceptions.
> >
> > Jeff
> >
> > ------------------------------------------------------------------------
> > 80100000 startup_32 4 0.0244
> - - -
> > 80180bac ide_delay_50ms 328 13.6667
> - - -
> > 00000000 total 3254 0.0039
> >
> > ------------------------------------------------------------------------
> > 4 startup_32 0.0201
> > 93076 default_idle 1789.9231
> - - -
> > 445 ide_delay_50ms 15.8929
> - - -
> > 97999 total 0.0716
>
> --
> Home page:
> http://www.norran.net/nra02596/
>
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This archive was generated by hypermail 2b29 : Sun Apr 23 2000 - 21:00:14 EST