Version 2.5.4 of perfctr, the Linux/x86 performance
monitoring counters driver, is now available at the usual
Version 2.5.4, 2003-06-01
- Corrected the driver's handling of OVF_PMI+FORCE_OVF counters
on Pentium 4. This configuration didn't work at all, and
lead to various BUG messages from the driver.
These restrictions apply to OVF_PMI+FORCE_OVF counters:
* The ireset value must be -1.
* Once the counter has interrupted once, it will continue
to interrupt when the faulting instruction is restarted,
causing it to never complete. This problem also occurs
for non-FORCE_OVF interrupt-mode counters if the ireset
value is of too small magnitude, like -1.
This appears to be a P4 hardware quirk. Don't restart
FORCE_OVF interrupt-mode counters, and don't use ireset
values too small to allow instructions to complete.
- Updated library's K8 event descriptions to match current
documentation. Corrected several omissions and errors.
- Patch kit updated for kernels 2.5.70 and 2.4.21-rc6.
/ Mikael Pettersson
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This archive was generated by hypermail 2b29 : Sat Jun 07 2003 - 22:00:15 EST