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Message-ID: <53D1FCE7.4000606@intel.com>
Date: Fri, 25 Jul 2014 14:44:55 +0800
From: Aaron Lu <aaron.lu@...el.com>
To: Tom Herbert <therbert@...gle.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
On 07/25/2014 02:37 PM, Tom Herbert wrote:
> Are you pointing out a regressions in this?
No, the report is an indication your commit makes the Throughput_Mbps of
the netperf benchamrk increased 27.3%, a good thing I think.
Thanks,
Aaron
>
> 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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