On Thu, Dec 23, 2010 at 6:38 AM, 陳韋任 <che...@iis.sinica.edu.tw> wrote: > Hi, folks > > I have a couple of questions about perfmon internal mechanisms. > > First, I have a function called "process_buffer" to process the > buffer when the buffer overflows. What if the buffer overflows *again* > while the "process_buffer" function does not finish its job? > When you get the buffer full notification in your program, monitoring is stopped. You have to re-activate using pfm_restart().
> Second, if I have a few per-thread perfmon context attaching to > different threads, are those samplings stored in one buffer? Or > there are per-thread buffer storing each thread's sampling? > There is a sampling buffer per perfmon session (pfm_create_context). A session can only be attached to one thread at a time. Thus, the buffer is private to each thread. > Thanks! > > Regards, > chenwj > > -- > Wei-Ren Chen (陳韋任) > Parallel Processing Lab, Institute of Information Science, > Academia Sinica, Taiwan (R.O.C.) > Tel:886-2-2788-3799 #1667 > > ------------------------------------------------------------------------------ > Learn how Oracle Real Application Clusters (RAC) One Node allows customers > to consolidate database storage, standardize their database environment, and, > should the need arise, upgrade to a full multi-node Oracle RAC database > without downtime or disruption > http://p.sf.net/sfu/oracle-sfdevnl > _______________________________________________ > perfmon2-devel mailing list > perfmon2-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/perfmon2-devel > ------------------------------------------------------------------------------ Learn how Oracle Real Application Clusters (RAC) One Node allows customers to consolidate database storage, standardize their database environment, and, should the need arise, upgrade to a full multi-node Oracle RAC database without downtime or disruption http://p.sf.net/sfu/oracle-sfdevnl _______________________________________________ perfmon2-devel mailing list perfmon2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/perfmon2-devel
