Hi Dan, See the 'overflow' examples in the libpfm directory. (I'm assuming they exist in libpfm4) You don't really want buffered sampling here, because you are taking the interrupt directly as a signal rather than buffering the information.
Also, you don't need PEBS for this, since you are not looking for the precise IP upon sample time... Conversely, you could simply use the process_smpl_buffer example, but make sure your sample buffer only has enough room for one sample. That will likely cause more overhead... Hope this helps. Philip www.samaratechnologygroup.com On Apr 27, 2010, at 2:02 PM, Dan Upton wrote: > Hi all- > > I'm trying to get an interrupt every 1m instructions so that I can > read some other information in the system (such as the temperature > sensor on a Core 2). I tried building off of pebs_smpl from the > libpfm4 git tree, but I can't figure out what I would need to do to > get notified every sample: if I'm understanding it correctly, > process_smpl_buffer is only called once some buffer in memory > overflows. Is there a reasonable way using libpfm4 (or anything > from perf) to get notified at every interrupt? > > Thanks, > -dan > ------------------------------------------------------------------------------ > _______________________________________________ > perfmon2-devel mailing list > perfmon2-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/perfmon2-devel ------------------------------------------------------------------------------ _______________________________________________ perfmon2-devel mailing list perfmon2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/perfmon2-devel
