lkml.org 
[lkml]   [2012]   [Jul]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 04/10] perf, x86: Making hardware events translations available in sysfs
From
Date
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;



\
 
 \ /
  Last update: 2012-07-04 13:21    [W:0.082 / U:1.216 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site