Re: [Fault-injection-developer] Need for benchmarking

[Rusty L. <ru...@li...>]

excellent.  If we can start getting regular results
posted then we can get a clue as to what kind of overhead
we are causing.

Seems like something that could be automated if you have
the hardware available.

        --rusty

----- Original Message -----
From: "Wang, Stanley" <sta...@in...>
To: "Lynch, Rusty" <rus...@in...>; "Zhuang, Louis" <louis.zhuang=
@intel.com>; "Gao, Kevin" <kev...@in...>; "'Rusty
Lynch'" <ru...@li...>; <fau...@li...=
ceforge.net>
Sent: Sunday, December 15, 2002 8:56 PM
Subject: RE: [Fault-injection-developer] Need for benchmarking


> We've download "lmbench". And it may help us :)
>
> Stan
>
> > -----Original Message-----
> > From: Lynch, Rusty [mailto:rus...@in...]
> > Sent: 2002=C4=EA12=D4=C216=C8=D5 11:54
> > To: Zhuang, Louis; Gao, Kevin; 'Rusty Lynch';
> > fau...@li...
> > Subject: RE: [Fault-injection-developer] Need for benchmarking
> >
> >
> > Does LTP contain a benchmarking tool?  We could definitely
> > run it to make sure we didn't accidentally break something
> > else in the kernel.
> >
> > BTW, do not overlook using STP on OSDL as a testing tool.
> > It's easy to use and there are a bunch of machines waiting
> > to be utilized.
> >
> > -rusty
> >
> > > -----Original Message-----
> > > From: Zhuang, Louis [mailto:lou...@in...]
> > > Sent: Sunday, December 15, 2002 4:45 PM
> > > To: Gao, Kevin; 'Rusty Lynch';
> > > fau...@li...
> > > Subject: RE: [Fault-injection-developer] Need for benchmarking
> > >
> > >
> > > Maybe we can use LTP to test performance.
> > >
> > > -----Original Message-----
> > > From: Gao, Kevin [mailto:kev...@in...]
> > > Sent: Monday, December 16, 2002 8:31 AM
> > > To: 'Rusty Lynch'; fau...@li...
> > > Subject: RE: [Fault-injection-developer] Need for benchmarking
> > >
> > > We can do some tiny program to test the time of MMIO read,
> > > write operation in such situation:
> > >
> > > common kernel.
> > > Kernel with our FITH, but no faultset.
> > > Kernel with our FITH, but the address of faultset is not
> > > associate with the
> > > operation.
> > > Kernel with our FITH, corresponding faultset but no action.
> > > Kernel with our FITH, and injection corresponding fault into
> > > the operation.
> > >
> > > Any other ideas?
> > >
> > > Kevin
> > >
> > >
> > > -----Original Message-----
> > > From: Rusty Lynch [mailto:ru...@li...]
> > > Sent: 2002=C4=EA12=D4=C214=C8=D5 0:36
> > > To: fau...@li...
> > > Subject: [Fault-injection-developer] Need for benchmarking
> > >
> > >
> > > We could use some standardized benchmarking to
> > > periodically run on our code base to get a feel for how
> > > much overhead our changes are adding.
> > >
> > > For example our current code adds a hook to the
> > > page fault handler.  It would be really easy to thrash
> > > the kernel with even the smallest of tweaks to that
> > > code.
> > >
> > > Any idea's?  Kevin, have planned on putting something
> > > together?
> > >
> > >     -rustyl
> > >
> > >
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