Re: [perfmon2] maximum outfile size

[Vince W. <vi...@cs...>]

On Wed, 21 Oct 2009, Carole Wu wrote:

> Hello,
> 
> I am dumping pfmon statistics with --smpl-outfile=xxx with pebs enabled, and
> this is on Ubuntu with ext3 (Max. file size is 16G).

Are you on a 32-bit machine?

By default on 32-bit machines files cannot be longer than 2GB.  For larger 
files, at open time the O_LARGEFILE flag has to be passed in to the open 
syscall.

You can use strace to see what flags are being passed at file open time.  

If the flag is missing, then the perf source would need to be fixed to 
properly have it.

Vince

> 
> Thanks,
> Carole
> 
> On Tue, Oct 20, 2009 at 3:55 AM, stephane eranian <er...@go...>wrote:
> 
> > On Tue, Oct 20, 2009 at 1:34 AM, Carole Wu <cw...@gm...> wrote:
> > > Hi,
> > > I am dumping pfmon statistics with --outfile=xxx. It seems like the
> > maximum
> > > trace file size is set 2GB. Is this a pfmon setting? If so, how can I
> > change
> > > this to larger?
> >
> > Are you talking about --outfile which dumps counts or --smpl-outfile which
> > dumps
> > profiles?
> >
> > What filesystem is this saved on?
> > Some filesystems have a 2GB file size limit.
> >
> > > Thanks in advance,
> > > Carole
> > >
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> 

-- 
/*  Vince Weaver  vi...@cs...  http://csl.cornell.edu/~vince  */

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