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
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This archive was generated by hypermail 2b29 : Sun Apr 23 2000 - 21:00:14 EST