> Hello Steve Lord,
>
> > > 2. kernel 2.4.11-pre2-xfs, with highmem support
> > > 3. create ramdisk 512Mb and run "tiotest -c -f 110"
> >
> > And what type of filesystems were used? I am presuming XFS.
>
> ext2 & xfs , but whis test with ext2
OK, in which case I doubt that the changes XFS has in the kernel will
be influencing things - except xfs filesystems elsewhere on the system
will have hold of memory, although it should be reclaimable from ext2
just fine.
>
> > > 4.
> > > __alloc_pages: 0-order allocation failed (gfp=0x3d0/0) from c0127fe9
> > > __alloc_pages: 0-order allocation failed (gfp=0x2f0/0) from c0127fe9
> > > __alloc_pages: 0-order allocation failed (gfp=0x70/0) from c0127fe9
> > > __alloc_pages: 0-order allocation failed (gfp=0x2f0/0) from c0127fe9
> > > __alloc_pages: 0-order allocation failed (gfp=0x70/0) from c0127fe9
>
> > Can you map that address onto a symbol by any chance?
>
> #/ksymoops-2.4.3/ksymoops -A c0127fe9 -m /boot/System.map
> ...
>
> Adhoc c0127fe8 <_alloc_pages+18/20>
Oh well, thats really useful, maybe __alloc_pages should report on its
caller's caller.
>
> 6.
>
> ...
> swap_dup: Bad swap file entry 3f41e02c
> VM: killing process forwarderng
> swap_free: Bad swap offset entry 3ce50000
> swap_free: Bad swap file entry 3f41e02c
> swap_free: Bad swap offset entry 38bb5000
> ...
>
> What is it? Kernel or may be my hardware problem?
Probably kernel, but I am not really an expert on this part of the system,
is your swap a device or a file on a filesystem?
>
>
>
> 7. Interesting result (xfs speed):
>
> buran:~ # cat ram_disk_ext2
> buran:/ramdisk0/tiobench-0.3.1 # while (true) do ./tiotest -c -f 110 ;
> sleep
> 60; done
> Tiotest results for 4 concurrent io threads:
>
> ,----------------------------------------------------------------------.
> | Item | Time | Rate | Usr CPU | Sys CPU |
> +-----------------------+----------+--------------+----------+---------+
> | Write 440 MBs | 17.9 s | 24.646 MB/s | 0.7 % | 60.8 % |
> | Random Write 16 MBs | 0.5 s | 28.593 MB/s | 1.8 % | 60.4 % |
> | Read 440 MBs | 14.1 s | 31.167 MB/s | 28.3 % | 43.6 % |
> | Random Read 16 MBs | 0.5 s | 33.751 MB/s | 30.2 % | 51.8 % |
> ----------------------------------------------------------------------'
>
> buran:~ # cat ram_disk_xfs
> buran:/ramdisk0/tiobench-0.3.1 # while (true) do ./tiotest -c -f 110 ;
> sleep
> 60; done
> Tiotest results for 4 concurrent io threads:
>
> ,----------------------------------------------------------------------.
> | Item | Time | Rate | Usr CPU | Sys CPU |
> +-----------------------+----------+--------------+----------+---------+
> | Write 440 MBs | 7.9 s | 55.974 MB/s | 1.8 % | 71.4 % |
> | Random Write 16 MBs | 0.3 s | 45.764 MB/s | 0.0 % | 55.6 % |
> | Read 440 MBs | 11.1 s | 39.529 MB/s | 38.0 % | 34.3 % |
> | Random Read 16 MBs | 0.5 s | 32.868 MB/s | 27.3 % | 42.1 % |
> ----------------------------------------------------------------------'
>
>
That's good to see,
Thanks
Steve
>
>
>
>
> --
> bye.
> Andrey Nekrasov, SpyLOG.
> -
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This archive was generated by hypermail 2b29 : Sun Oct 07 2001 - 21:00:37 EST