Messages in this thread |  | | From | Andi Kleen <> | Subject | Re: [discuss] Re: 2.6.19-rc5: known regressions (v3) | Date | Thu, 16 Nov 2006 16:47:38 +0100 |
| |
> What other purposes do you see the performance counters useful for?
Export one to user space as a cycle counter for benchmarking. RDTSC doesn't do this job anymore.
> To collect information on process characteristics so they can be scheduled more efficiently?
That might happen at some point in the future, but i would expect us to wait for CPUs with more performance counters first.
> Is this going to require sharing the nmi interrupt and knowing which perfcounter > register triggered the interrupt to get the correct action? Currently the > oprofile interrupt handler assumes any performance monitoring counter it sees > overflowing is something it should count.
Yes. That needs to be fixed.
-Andi
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
|  |