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Date: Sun, 29 Jun 2014 23:15:44 +0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc: Dave Hansen <dave.hansen@...el.com>,
LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [rcu] 2d033d5c0d4: +225.2% iperf.tcp.sender.bps
Hi Paul,
FYI, we noticed the below changes on
git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/next
commit 2d033d5c0d424b7029abd0fc82e940ebc318fd89 ("rcu: Bind grace-period kthreads to non-NO_HZ_FULL CPUs")
test case: bens/iperf/300s-tcp
e17adc3f20bc9a1 2d033d5c0d424b7029abd0fc8
--------------- -------------------------
7.011e+09 ~ 1% +225.2% 2.28e+10 ~ 2% TOTAL iperf.tcp.sender.bps
7.011e+09 ~ 1% +225.2% 2.28e+10 ~ 2% TOTAL iperf.tcp.receiver.bps
15620691 ~ 1% +224.3% 50663012 ~ 2% TOTAL proc-vmstat.pgalloc_normal
62969722 ~ 1% +224.3% 2.042e+08 ~ 2% TOTAL proc-vmstat.pgfree
47347349 ~ 1% +224.3% 1.535e+08 ~ 2% TOTAL proc-vmstat.pgalloc_dma32
4996590 ~ 1% +218.9% 15933563 ~ 3% TOTAL softirqs.NET_RX
8084072 ~ 1% +218.4% 25739055 ~ 2% TOTAL proc-vmstat.numa_hit
8084072 ~ 1% +218.4% 25739055 ~ 2% TOTAL proc-vmstat.numa_local
28676 ~ 2% -47.5% 15059 ~11% TOTAL softirqs.RCU
99756 ~ 2% +76.0% 175606 ~ 2% TOTAL softirqs.SCHED
562 ~11% +50.9% 848 ~17% TOTAL slabinfo.proc_inode_cache.active_objs
620 ~ 8% +38.7% 860 ~15% TOTAL slabinfo.proc_inode_cache.num_objs
271905 ~ 4% +17.4% 319216 ~ 0% TOTAL softirqs.TIMER
1117 ~ 1% -9.1% 1015 ~ 2% TOTAL proc-vmstat.pgactivate
9049 ~11% -94.6% 485 ~26% TOTAL time.involuntary_context_switches
23233 ~ 1% +72.1% 39979 ~ 2% TOTAL vmstat.system.cs
13078 ~ 1% +69.1% 22117 ~ 1% TOTAL vmstat.system.in
Legend:
~XX% - stddev percent
[+-]XX% - change percent
iperf.tcp.sender.bps
2.4e+10 ++----O-----O-----------O--------------O-----O--------O-----O-----+
| O O O O O O O O |
2.2e+10 O+ O O O |
2e+10 ++ O |
| |
1.8e+10 ++ |
1.6e+10 ++ O O |
| |
1.4e+10 ++ |
1.2e+10 ++ |
| |
1e+10 ++ |
8e+09 ++ |
*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*
6e+09 ++----------------------------------------------------------------+
iperf.tcp.receiver.bps
2.4e+10 ++----O-----O-----------O--------------O-----O--------O-----O-----+
| O O O O O O O O |
2.2e+10 O+ O O O |
2e+10 ++ O |
| |
1.8e+10 ++ |
1.6e+10 ++ O O |
| |
1.4e+10 ++ |
1.2e+10 ++ |
| |
1e+10 ++ |
8e+09 ++ |
*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*
6e+09 ++----------------------------------------------------------------+
time.involuntary_context_switches
14000 ++------------------------------------------------------------------+
| |
12000 *+. .*.. ..*..*.. .*.. |
| .*..*. *. *. |
10000 ++ *. *..*.. .*..*..*.. ..*..*.. *
| *. *. .*.. ..|
8000 ++ *. * |
| |
6000 ++ |
| |
4000 ++ |
| |
2000 ++ |
| O O O O |
0 O+-O--O--O--O--O---O--O--O--O--O--O--O--O-----O------O--O-----O-----+
[*] 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,
Fengguang
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