Carl, If you need to set a bit to generate interrupt on overflow, like most other processors, then I suggest you leverage the default value/reserved bitmask fields of the PMU register description table to enforce that the bit is set no matter what. We use this approach on Itanium and X86. That will avoid problems. Of this is unless, there is a valid use for turning that bit off. Note that we do also support this on Intel X86 processors when using PEBS.
On Thu, Jun 12, 2008 at 10:00 PM, Carl Love <[EMAIL PROTECTED]> wrote: > > On Thu, 2008-06-12 at 15:40 -0400, Dan Terpstra wrote: >> Hi - >> In preliminary testing of PAPI on perfmon2/Cell, it appears that the CYCLES >> event produced by pfm_get_cycle_event() is not virtualized beyond 32 bits. >> One of the basic PAPI tests shows this quite clearly: > > Virtual 64 bit counters on CELL do work. The virtual counters work for > the CPC tool which works directly on the perfmon2 API. > > Please make sure that the CELL pm_status register is configured to > enable interrupts on counter overflow for the counter you are using. > Bits 0:7 of the 32 bit register where (0 is the MSB and 31 is the LSB) > correspond to the 8 16 bit counters. For CELL, we only support 32 bits > which means you need to set bits 0:3 in the register for counters 0 to > 3. > > <snip> >> Is this (not) happening in the kernel or in the libpfm layer? >> Does the same apply to other events as well? >> >> - d >> > > This will be true for all events. > > Carl Love > > > > ------------------------------------------------------------------------- > Check out the new SourceForge.net Marketplace. > It's the best place to buy or sell services for > just about anything Open Source. > http://sourceforge.net/services/buy/index.php > _______________________________________________ > perfmon2-devel mailing list > perfmon2-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/perfmon2-devel > ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ perfmon2-devel mailing list perfmon2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/perfmon2-devel
