Subject: Re: [patch] voluntary-preempt-2.6.9-rc3-mm3-T3
From: Lee Revell <rlrevell@joe-job.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: linux-kernel <linux-kernel@vger.kernel.org>, "K.R. Foley" <kr@cybsft.com>,
       Rui Nuno Capela <rncbc@rncbc.org>,
       Florian Schmidt <mista.tapas@gmx.net>, Mark_H_Johnson@raytheon.com,
       Fernando Pablo Lopez-Lezcano <nando@ccrma.Stanford.EDU>
In-Reply-To: <20041007105230.GA17411@elte.hu>
References: <20040921071854.GA7604@elte.hu> <20040921074426.GA10477@elte.hu>
	 <20040922103340.GA9683@elte.hu> <20040923122838.GA9252@elte.hu>
	 <20040923211206.GA2366@elte.hu> <20040924074416.GA17924@elte.hu>
	 <20040928000516.GA3096@elte.hu> <20041003210926.GA1267@elte.hu>
	 <20041004215315.GA17707@elte.hu> <20041005134707.GA32033@elte.hu>
	 <20041007105230.GA17411@elte.hu>
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Date: Wed, 13 Oct 2004 12:48:15 -0400
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On Thu, 2004-10-07 at 06:52, Ingo Molnar wrote:
> i've released the -T3 VP patch:
> 
>   http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.9-rc3-mm3-T3
> 

Ingo, here's the data from an 87 million sample run (about 24 hours) of
my jackd test.  Note the 1292 usec outlier.  This is definitely not
latency trace overhead as it was disabled.  I suspect either the
rt_garbage_collect or journal_clean_checkpoint_list code path is
responsible.

Delay   # samples
-----   ---------
0       86798124
1       122
2       113
3       118
4       109
5       96
6       78
7       66
8       66
9       51
10      52
11      41
12      39
13      43
14      43
15      30
16      17
17      18
18      28
19      17
20      18
21      16
22      19
23      19
24      19
25      15
26      26
27      13
28      13
29      10
30      17
31      19
32      12
33      12
34      17
35      7
36      16
37      13
38      7
39      10
40      9
41      9
42      9
43      8
44      11
45      18
46      12
47      13
48      6
49      12
50      12
51      13
52      8
53      11
54      14
55      5
56      5
57      11
58      8
59      11
60      8
61      5
62      11
63      8
64      9
65      11
66      9
67      8
68      8
69      8
70      8
71      8
72      11
73      10
74      10
75      8
76      2
77      7
78      4
79      9
80      5
81      4
82      2
83      7
84      6
85      1
86      7
87      5
88      10
89      7
90      3
91      7
92      7
93      7
94      1
95      7
96      5
97      7
98      2
99      3
100     3
101     4
102     4
103     4
104     5
105     3
106     5
107     2
108     4
109     1
110     2
111     2
112     3
113     2
115     1
116     3
117     2
118     3
119     3
120     1
121     2
122     2
123     2
124     1
127     1
128     2
129     2
130     2
133     1
135     1
139     1
141     2
145     1
147     1
152     1
156     1
169     1
173     1
177     1
187     1
194     2
233     1
242     1
290     1
352     1
1292    1

Lee


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