Re: [PATCH] poll: Avoid extra wakeups in select/poll

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To: Eric Dumazet <dada1@...>
Cc: linux kernel <linux-kernel@...>, Andi Kleen <andi@...>, David Miller <davem@...>, <jesse.brandeburg@...>, <netdev@...>, <haoki@...>, <mchan@...>, <davidel@...>, Ingo Molnar <mingo@...>
Date: Tuesday, April 28, 2009 - 3:05 pm

For the udpping test load these patches have barely any effect:

git2p1 is the first version of the patch
git2p2 is the second version (this one)

Same CPU
Kernel			Test 1	Test 2	Test 3	Test 4	Average
2.6.22			83.03	82.9	82.89	82.92	82.935
2.6.23			83.35	82.81	82.83	82.86	82.9625
2.6.24			82.66	82.56	82.64	82.73	82.6475
2.6.25			84.28	84.29	84.37	84.3	84.31
2.6.26			84.72	84.38	84.41	84.68	84.5475
2.6.27			84.56	84.44	84.41	84.58	84.4975
2.6.28			84.7	84.43	84.47	84.48	84.52
2.6.29			84.91	84.67	84.69	84.75	84.755
2.6.30-rc2		84.94	84.72	84.69	84.93	84.82
2.6.30-rc3		84.88	84.7	84.73	84.89	84.8
2.6.30-rc3-git2p1	84.89	84.77	84.79	84.85	84.825
2.6.30-rc3-git2p2	84.91	84.79	84.78	84.8	84.82

Same Core
Kernel			Test 1	Test 2	Test 3	Test 4	Average
2.6.22			84.6	84.71	84.52	84.53	84.59
2.6.23			84.59	84.5	84.33	84.34	84.44
2.6.24			84.28	84.3	84.38	84.28	84.31
2.6.25			86.12	85.8	86.2	86.04	86.04
2.6.26			86.61	86.46	86.49	86.7	86.565
2.6.27			87	87.01	87	86.95	86.99
2.6.28			86.53	86.44	86.26	86.24	86.3675
2.6.29			85.88	85.94	86.1	85.69	85.9025
2.6.30-rc2		86.03	85.93	85.99	86.06	86.0025
2.6.30-rc3		85.73	85.88	85.67	85.94	85.805
2.6.30-rc3-git2p1	86.11	85.8	86.03	85.92	85.965
2.6.30-rc3-git2p2	86.04	85.96	85.89	86.04	85.9825

Same Socket
Kernel			Test 1	Test 2	Test 3	Test 4	Average
2.6.22			90.08	89.72	90	89.9	89.925
2.6.23			89.72	90.1	89.99	89.86	89.9175
2.6.24			89.18	89.28	89.25	89.22	89.2325
2.6.25			90.83	90.78	90.87	90.61	90.7725
2.6.26			90.51	91.25	91.8	91.69	91.3125
2.6.27			91.98	91.93	91.97	91.91	91.9475
2.6.28			91.72	91.7	91.84	91.75	91.7525
2.6.29			89.85	89.85	90.14	89.9	89.935
2.6.30-rc2		90.78	90.8	90.87	90.73	90.795
2.6.30-rc3		90.84	90.94	91.05	90.84	90.9175
2.6.30-rc3-git2p1	90.87	90.95	90.86	90.92	90.9
2.6.30-rc3-git2p2	91.09	91.01	90.97	91.06	91.0325

Different Socket
Kernel			Test 1	Test 2	Test 3	Test 4	Average
2.6.22			91.64	91.65	91.61	91.68	91.645
2.6.23			91.9	91.84	91.92	91.83	91.873
2.6.24			91.33	91.24	91.42	91.38	91.343
2.6.25			92.39	92.04	92.3	92.23	92.240
2.6.26			90.64	90.57	90.6	90.08	90.473
2.6.27			91.14	91.26	90.9	91.09	91.098
2.6.28			92.3	91.92	92.3	92.23	92.188
2.6.29			90.57	89.83	89.9	90.41	90.178
2.6.30-rc2		90.59	90.97	90.27	91.69	90.880
2.6.30-rc3		92.08	91.32	91.21	92.06	91.668
2.6.30-rc3-git2p1	91.46	91.38	91.92	91.03	91.448
2.6.30-rc3-git2p2	91.39	90.47	90.03	90.62	90.628

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Messages in current thread:
udp ping pong with various process bindings (and correct cpu..., Christoph Lameter, (Fri Apr 24, 4:10 pm)
[PATCH] poll: Avoid extra wakeups, Eric Dumazet, (Sun Apr 26, 6:46 am)
Re: [PATCH] poll: Avoid extra wakeups, Andi Kleen, (Tue Apr 28, 10:21 am)
[PATCH] poll: Avoid extra wakeups in select/poll, Eric Dumazet, (Tue Apr 28, 11:06 am)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Ingo Molnar, (Wed Apr 29, 5:16 am)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Eric Dumazet, (Wed Apr 29, 5:36 am)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Ingo Molnar, (Wed Apr 29, 6:27 am)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Eric Dumazet, (Wed Apr 29, 8:29 am)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Davide Libenzi, (Wed Apr 29, 11:53 am)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Ingo Molnar, (Wed Apr 29, 9:07 am)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Andrew Morton, (Wed Apr 29, 3:20 am)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Eric Dumazet, (Wed Apr 29, 3:39 am)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Eric Dumazet, (Wed Apr 29, 4:26 am)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Andi Kleen, (Wed Apr 29, 3:35 am)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Ingo Molnar, (Wed Apr 29, 5:22 am)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Eric Dumazet, (Wed Apr 29, 3:37 am)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Christoph Lameter, (Tue Apr 28, 3:05 pm)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Eric Dumazet, (Tue Apr 28, 4:05 pm)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Christoph Lameter, (Tue Apr 28, 4:14 pm)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Eric Dumazet, (Tue Apr 28, 4:33 pm)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Christoph Lameter, (Tue Apr 28, 4:49 pm)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Eric Dumazet, (Tue Apr 28, 5:04 pm)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Eric Dumazet, (Tue Apr 28, 5:11 pm)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Ingo Molnar, (Wed Apr 29, 5:11 am)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Eric Dumazet, (Thu Apr 30, 6:49 am)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Ingo Molnar, (Thu Apr 30, 7:57 am)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Eric Dumazet, (Thu Apr 30, 10:08 am)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Paul E. McKenney, (Thu Apr 30, 5:24 pm)
[BUG] perf_counter: change cpu frequencies , Eric Dumazet, (Thu Apr 30, 12:07 pm)
Re: [BUG] perf_counter: change cpu frequencies, Eric Dumazet, (Sun May 3, 2:06 am)
Re: [BUG] perf_counter: change cpu frequencies, Ingo Molnar, (Sun May 3, 3:25 am)
Re: [BUG] perf_counter: change cpu frequencies, Eric Dumazet, (Mon May 4, 6:39 am)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Christoph Lameter, (Tue Apr 28, 5:00 pm)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Eric Dumazet, (Tue Apr 28, 5:05 pm)
Re: [PATCH] poll: Avoid extra wakeups in select/poll, Christoph Lameter, (Tue Apr 28, 5:04 pm)
Re: [PATCH] poll: Avoid extra wakeups, Eric Dumazet, (Tue Apr 28, 10:58 am)
Re: [PATCH] poll: Avoid extra wakeups, David Miller, (Tue Apr 28, 5:15 am)
Re: [PATCH] poll: Avoid extra wakeups, Eric Dumazet, (Tue Apr 28, 5:24 am)
Re: [PATCH] poll: Avoid extra wakeups, Jarek Poplawski, (Sun Apr 26, 9:33 am)
Re: [PATCH] poll: Avoid extra wakeups, Eric Dumazet, (Sun Apr 26, 10:27 am)