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Date: Thu, 24 Jul 2014 23:37:07 -0700
From: Tom Herbert <therbert@...gle.com>
To: Aaron Lu <aaron.lu@...el.com>
Cc: "David S. Miller" <davem@...emloft.net>,
LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: Re: [LKP] [net] 11ef7a8996d: +27.3% netperf.Throughput_Mbps
Are you pointing out a regressions in this?
On Thu, Jul 24, 2014 at 11:31 PM, Aaron Lu <aaron.lu@...el.com> wrote:
> FYI, we noticed the below changes on
>
> commit 11ef7a8996d5d433c9cd75d80651297eccbf6d42 ("net: Performance fix for process_backlog")
>
> test case: lkp-t410/netperf/300s-200%-10K-SCTP_STREAM_MANY
>
> 68b7107b62983f2 11ef7a8996d5d433c9cd75d80
> --------------- -------------------------
> 1023 ~ 3% +27.3% 1302 ~ 0% TOTAL netperf.Throughput_Mbps
> 0.72 ~10% -91.4% 0.06 ~23% TOTAL turbostat.%c3
> 13385 ~12% -92.6% 987 ~12% TOTAL cpuidle.C6-NHM.usage
> 22745 ~10% -95.5% 1016 ~40% TOTAL cpuidle.C3-NHM.usage
> 42675736 ~12% -84.6% 6571705 ~19% TOTAL cpuidle.C6-NHM.time
> 88342 ~11% -82.1% 15811 ~ 9% TOTAL softirqs.SCHED
> 19148006 ~12% -95.7% 821873 ~27% TOTAL cpuidle.C3-NHM.time
> 439.94 ~10% -77.5% 99.05 ~ 5% TOTAL uptime.idle
> 1.35 ~ 6% -65.8% 0.46 ~24% TOTAL turbostat.%c6
> 4 ~23% +114.3% 9 ~ 0% TOTAL vmstat.procs.r
> 1680 ~ 3% +40.4% 2359 ~ 3% TOTAL proc-vmstat.nr_alloc_batch
> 447921 ~ 4% +36.2% 610047 ~ 0% TOTAL softirqs.TIMER
> 9.09 ~ 9% +27.6% 11.60 ~ 8% TOTAL perf-profile.cpu-cycles.memcpy.sctp_outq_flush.sctp_outq_uncork.sctp_cmd_interpreter.sctp_do_sm
> 2350916 ~ 4% +35.4% 3184088 ~ 0% TOTAL proc-vmstat.pgalloc_dma
> 7.82 ~ 9% +24.1% 9.71 ~ 4% TOTAL perf-profile.cpu-cycles.copy_user_generic_string.sctp_user_addto_chunk.sctp_datamsg_from_user.sctp_sendmsg.inet_sendmsg
> 38837537 ~ 3% +27.1% 49358639 ~ 0% TOTAL proc-vmstat.numa_local
> 38837537 ~ 3% +27.1% 49358639 ~ 0% TOTAL proc-vmstat.numa_hit
> 50216 ~ 1% +17.0% 58745 ~ 6% TOTAL softirqs.RCU
> 1.41 ~ 4% +11.6% 1.58 ~ 1% TOTAL perf-profile.cpu-cycles.get_page_from_freelist.__alloc_pages_nodemask.alloc_kmem_pages_node.kmalloc_large_node.__kmalloc_node_track_caller
> 48539 ~ 1% -25.5% 36171 ~ 1% TOTAL vmstat.system.cs
> 75.64 ~ 4% +30.6% 98.82 ~ 0% TOTAL turbostat.%c0
> 3949 ~ 2% +13.4% 4478 ~ 0% TOTAL vmstat.system.in
>
> Legend:
> ~XX% - stddev percent
> [+-]XX% - change percent
>
>
> vmstat.system.cs
>
> 52000 ++------------------------------------------------------------------+
> 50000 ++ * .* *. ** *. * *. |
> | .* + *.** *. : **.* .* .**.**. * + + *.* * + : * .**. *. .**
> 48000 ** * * * * * * * .* * * * ** |
> 46000 ++ * |
> | |
> 44000 ++ |
> 42000 ++ |
> 40000 ++ |
> | |
> 38000 +O O O |
> 36000 O+ O O O O OO OO OO O O O O O OO O OO O |
> | O O O O O O O |
> 34000 ++ O O O O |
> 32000 ++------------------------------------------------------------------+
>
>
> [*] bisect-good sample
> [O] bisect-bad sample
>
>
> Disclaimer:
> Results have been estimated based on internal Intel analysis and are provided
> for informational purposes only. Any difference in system hardware or software
> design or configuration may affect actual performance.
>
> Thanks,
> Aaron
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