Messages in this thread | | | Subject | Re: [PATCH 04/10] perf, x86: Making hardware events translations available in sysfs | From | Peter Zijlstra <> | Date | Wed, 04 Jul 2012 12:38:31 +0200 |
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On Wed, 2012-07-04 at 12:22 +0200, Peter Zijlstra wrote: > How about something like: > > u64 config = x86_pmu.event_map(_id); > u64 event = (config & ARCH_PERFMON_EVENTSEL_EVENT) | > (config & AMD64_EVENTSEL_EVENT) >> 24; > u64 umask = (config & ARCH_PERFMON_EVENTSEL_UMASK) >> 8; > > WARN_ON_ONCE(config & (ARCH_PERFMON_EVENTSEL_INV | > ARCH_PERFMON_EVENTSEL_CMASK)); > > sprintf("event=0x%02llx,umask=0x%02llx\n", event, umask);
Oh wait, silly me, we actually need the inv and cmask too.
So that gets to be something like:
u64 config = x86_pmu.event_map(_id); u64 event = (config & ARCH_PERFMON_EVENTSEL_EVENT) | (config & AMD64_EVENTSEL_EVENT) >> 24; u64 umask = (config & ARCH_PERFMON_EVENTSEL_UMASK) >> 8; u64 inv = (config & ARCH_PERFMON_EVENTSEL_INV) >> 23; u64 cmask = (config & ARCH_PERFMON_EVENTSEL_CMASK) >> 24; ssize_t ret;
ret = sprintf(page, "event=0x%02llx", event); if (umask) ret += sprintf(page + ret, ",umask=0x%02llx", umask); if (inv) ret += sprintf(page + ret, ",inv"); if (cmask) ret += sprintf(page + ret, ",cmask=0x%02llx", cmask); sprintf(page + ret, "\n"); return ret;
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