Message-ID: <4B389468.5060209@klingt.org>
Date: Mon, 28 Dec 2009 12:20:08 +0100
From: Tim Blechmann <tim@klingt.org>
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Subject: [PATCH 1/2] perf: replace irq_period with union in design document
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perf_event_attr.irq_period has been renamed to sample_period/sample_freq.=

the design document was still using the old name, though.

Signed-off-by: Tim Blechmann <tim@klingt.org>
---
 tools/perf/design.txt |   12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)


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diff --git a/tools/perf/design.txt b/tools/perf/design.txt
index a58cc9a..d68515f 100644
--- a/tools/perf/design.txt
+++ b/tools/perf/design.txt
@@ -43,7 +43,11 @@ struct perf_event_attr {
          */
         __u64                   config;
=20
-        __u64                   irq_period;
+        union {
+            __u64               sample_period;
+            __u64               sample_freq;
+        };
+
         __u32                   record_type;
         __u32                   read_format;
=20
@@ -147,7 +151,7 @@ tracer is available, and event_id values can be obtai=
ned from
 Counters come in two flavours: counting counters and sampling
 counters.  A "counting" counter is one that is used for counting the
 number of events that occur, and is characterised by having
-irq_period =3D 0.
+sample_period =3D 0.
=20
=20
 A read() on a counter returns the current value of the counter and possi=
ble
@@ -170,8 +174,8 @@ into account.
=20
=20
 A "sampling" counter is one that is set up to generate an interrupt
-every N events, where N is given by 'irq_period'.  A sampling counter
-has irq_period > 0. The record_type controls what data is recorded on ea=
ch
+every N events, where N is given by 'sample_period'.  A sampling counter=

+has sample_period > 0. The record_type controls what data is recorded on=
 each
 interrupt:
=20
 /*


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