Re: [Discuss-gnuradio] SCHED_FIFO and NPTL

[Eric Blossom]

On Thu, Mar 09, 2006 at 10:55:55AM -0500, Lamar Owen wrote:
> On Wednesday 08 March 2006 14:33, Eric Blossom wrote:
> > I was burned by ext3 with regard to streaming disk throughput.
> > I ended up remounting the relevant filesystem as ext2 to avoid the
> > problem.  I have no info regarding CPU and/or preemption issues during
> > journal posting.  If we never go to the disk, it might not matter at
> > all.
> 
> Our box here is a Dell PowerEdge 2850 with the PCIe PERC 4e/Di U320 hardware 
> RAID controller.  The data drive is a RAID0 of 4 146GB 10K RPM U320 drives, 
> and sustains, with ext3, over 140MB/s.  We have successfully recorded 2 hours 
> at 32MB/s without any known issues.  Need to test further, though.

That's good throughput.  My tests were about three years ago, so
perhaps the problem's been addressed in the meanwhile.

> > I installed the Reiser FS on my new laptop.  I'll let you know if I
> > see anything hinky.  Haven't tried XFS.  I suspect it's OK.
> > SGI built truely *monstrous* media servers using it.
> 
> Be careful which XFS version you use.  The 2.6 kernel-supplied XFS code has 
> some problems, and you really need the latest SGI code instead.  The CentOS 4 
> group is working on an XFS-enabled kernel with the newer code.  Not sure 
> where SuSE and Ubuntu/Debian stand.

Thanks for the advise ;)

Eric