From: Paul Mackerras <paulus@samba.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@elte.hu>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] perf_counter: remove the event config bitfields
Date: Sun, 22 Mar 2009 10:50:27 +1100 [thread overview]
Message-ID: <18885.32067.929534.488134@cargo.ozlabs.ibm.com> (raw)
In-Reply-To: <1237673068.3922.257.camel@laptop>
Peter Zijlstra writes:
> Paul, I noticed you assign the raw config without mask, is that ok?
Yep. That doesn't get assigned directly to a hardware register; it
undergoes further processing first, which just pulls out the bits it
needs. (It's not used directly because the hardware has a couple of
registers that configure all the counters at once, rather than a
configuration register per counter.)
Paul.
next prev parent reply other threads:[~2009-03-21 23:50 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-21 4:53 [PATCH] perfcounters: fix type/event_id layout on big-endian systems Paul Mackerras
2009-03-21 9:42 ` Ingo Molnar
2009-03-21 9:52 ` Paul Mackerras
2009-03-21 9:56 ` Ingo Molnar
2009-03-21 11:41 ` Peter Zijlstra
2009-03-21 22:04 ` [PATCH] perf_counter: remove the event config bitfields Peter Zijlstra
2009-03-21 23:50 ` Paul Mackerras [this message]
2009-03-21 10:24 ` [PATCH] perfcounters: fix type/event_id layout on big-endian systems Peter Zijlstra
2009-03-21 12:08 ` Paul Mackerras
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