* [rcu] 2d033d5c0d4: +225.2% iperf.tcp.sender.bps
@ 2014-06-29 15:15 Fengguang Wu
2014-06-29 22:47 ` Paul E. McKenney
0 siblings, 1 reply; 2+ messages in thread
From: Fengguang Wu @ 2014-06-29 15:15 UTC (permalink / raw)
To: Paul E. McKenney; +Cc: Dave Hansen, LKML, lkp
[-- Attachment #1: Type: text/plain, Size: 5632 bytes --]
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
[-- Attachment #2: reproduce --]
[-- Type: text/plain, Size: 49 bytes --]
./iperf3 -s
./iperf3 -t 300 -f M -J -c 127.0.0.1
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [rcu] 2d033d5c0d4: +225.2% iperf.tcp.sender.bps
2014-06-29 15:15 [rcu] 2d033d5c0d4: +225.2% iperf.tcp.sender.bps Fengguang Wu
@ 2014-06-29 22:47 ` Paul E. McKenney
0 siblings, 0 replies; 2+ messages in thread
From: Paul E. McKenney @ 2014-06-29 22:47 UTC (permalink / raw)
To: Fengguang Wu; +Cc: Dave Hansen, LKML, lkp
On Sun, Jun 29, 2014 at 11:15:44PM +0800, Fengguang Wu wrote:
> 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")
Nice! Clearly outlines the hazards of providing too few housekeeping CPUs,
I would guess.
Thanx, Paul
> 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
> ./iperf3 -s
> ./iperf3 -t 300 -f M -J -c 127.0.0.1
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2014-06-29 22:47 ` Paul E. McKenney
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