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From "Alex Karasulu" <akaras...@apache.org>
Subject Re: Benchmarks feedback
Date Tue, 27 Mar 2007 16:13:30 GMT
Yeah let's work out a plan with respect to SLAMD.  Yes we need http and
perhaps some other ports for pushing stats.  But we need to come up with a
general plan.

Gimme a little bit and we can set something up using both my infrastructure
and Matt's.  Thanks again Matt for the support.

Regards,
Alex

On 3/27/07, Emmanuel Lecharny <elecharny@gmail.com> wrote:
>
> Just great !
>
> We will work out a solution with Alex, he knows about Slamd, I'm not used
> with it. I'm afraid that we may nedd an http access to it. I have tried to
> setup a ssh tunnel to wilbur, with no success...
>
> Emmanuel
>
> On 3/27/07, Matt Hogstrom <matt@hogstrom.org> wrote:
> >
> >
> >
> >  On Mar 27, 2007, at 10:56 AM, Alex Karasulu wrote:
> >
> >  I think we need to use load injectors and SLAMD with this thing.
> > Really having the clients on the same machine
> > is causing issues.  I highly recommend setting up some other machines as
> > client injectors.  I can do this with
> > some machines.
> >
> >
> >
> > I have another 8-way that is also running Linux.  The hostname is
> > nique.  Emmanuel, what you can do is ssh to wilbur and then ssh from wilbur
> > to nique.  Let's use nique as the driver.
> >
> >  Once your on nique you have direct access to the Internet to pull items
> > in.
> >
> >
> >
> >
> > Also Emmanuel we need to use SLAMD instead of inventing our own means to
> > measure performance.  The SUN
> > guys really put a lot of work into SLAMD and we should use it.  Perhaps
> > we can build our own custom tests if need
> > be.  SLAMD should be the default tool we use otherwise the measurments
> > and techniques used are questionable.
> >
> >
> >
> >
> > I haven't used SLAMD.  I have a C based load generator that is
> > proprietary.  If it scales that would be awesome.
> >
> >  If we use matt's machine as the server I can setup several machines on
> > the internet to be used as the load
> > injectors.  Yes this is a bit crazy across the open internet but if we
> > can generate enough load with a few
> > machines across several sites we should be able to peak the server.
> >
> >
> >
> >
> > If needed there are 3 other systems (of which nique is one) that can be
> > clients.  All on a local gigabit network.
> >
> >
> > Alex
> >
> > On 3/27/07, Emmanuel Lecharny < elecharny@gmail.com> wrote:
> > >
> > > Hi Matt,
> > >
> > > I wasn't sure you subscribed, sorry for the duplicated mails :(
> > >
> > >
> > > On 3/27/07, Matt Hogstrom < matt@hogstrom.org > wrote:
> > > >
> > > > I subscribed to your list so you won't have to copy me.
> > > >
> > > > I'd do a couple of things.  The system is Hyperthreaded so you have
> > > > "16" CPUs.  I'll reboot the system and go back to 8 real cores just
> > > > to make sure hyperthreading isn't a cause.  I'll do that tonight if
> > > > no one is on the system.
> > >
> > >
> > > Ok, np. I don't exactly know what 'tonite' means in UTC, FYI, I'm UTC
> > > + 2. (this mail has been sent at 09h05UTC)
> > > I'm not sure that HyperThreading could be the cause of bad performance
> > > I'm having...
> > >
> > >
> > > Next, I've used the IBM VM for this kind of analysis as it has a Java
> > > > Lock monitor built in that will help to identify hot locks that
> > > > might
> > > > be causing the scaling problem.
> > >
> > >
> > > I will install IBM JVM today. I have tested the server with IBM, SUN
> > > and BEA jvms last year, and it was my intention to do so.
> > >
> > >
> > > The next thing we can do is I have a hardware profiler on the system
> > > > that is similar to VTune that is most excellent at tracking CPU,
> > > > time
> > > > in method, etc.  I need to recompile the kernel so this will take a
> > > > few days.
> > >
> > >
> > > Oh, that would be great ! I feel like been totally blind when doing
> > > perf tests, just guessing about what could be the bottlenecks...
> > >
> > >
> > > So if you want to take this baby for another spin around the block,
> > > > let me know.  I'll get some instructions on setting up the lock
> > > > monitor.
> > >
> > >
> > > Yeah, sure. I'm working full time on ADS for a little while, so
> > > anytime you want will be ok for me.
> > >
> > >
> > > Nice to know my basement is getting warmed for good reason :)
> > >
> > >
> > > yeah, I'm not sure it helps figth against global warming...At least,
> > > it's not using gazoline to run !
> > >
> > >
> > > Matt
> > >
> > >
> > >
> > > --
> > > Cordialement,
> > > Emmanuel L├ęcharny
> > > www.iktek.com
> >
> >
> >
> >
> >
>
>
>
> --
> Cordialement,
> Emmanuel L├ęcharny
> www.iktek.com
>

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