[net/sctp] 362d52040c7: +99.0% netperf.Throughput_Mbps

From: Fengguang Wu
Date: Wed Apr 16 2014 - 23:39:19 EST

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Hi Daniel,

We noticed the same improvements in netperf SCTP_STREAM test case
as described in your patch changelog.

commit 362d52040c71f6e8d8158be48c812d7729cb8df1 ("Revert "net: sctp: Fix a_rwnd/rwnd management to reflect real state of the receiver's buffer"")

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
2.14 ~ 0% +98.9% 4.25 ~ 0% kbuildx/micro/netperf/300s-200%-SCTP_STREAM
2.14 ~ 0% +99.1% 4.25 ~ 0% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
2.14 ~ 0% +99.0% 4.25 ~ 0% lkp-t410/micro/netperf/300s-200%-SCTP_STREAM
6.41 ~ 0% +99.0% 12.76 ~ 0% TOTAL netperf.Throughput_Mbps

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
2.67 ~26% -100.0% 0.00 ~ 0% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
0.92 ~27% -100.0% 0.00 ~ 0% lkp-t410/micro/netperf/300s-200%-SCTP_STREAM
3.59 ~26% -100.0% 0.00 ~ 0% TOTAL perf-profile.cpu-cycles.copy_user_generic_string.skb_copy_datagram_iovec.skb_copy_datagram_iovec.sctp_recvmsg.sock_common_recvmsg

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
8.75 ~32% -80.4% 1.72 ~21% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
8.75 ~32% -80.4% 1.72 ~21% TOTAL perf-profile.cpu-cycles.sctp_packet_transmit.sctp_outq_flush.sctp_outq_uncork.sctp_cmd_interpreter.sctp_do_sm

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
0.00 +Inf% 1.22 ~22% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
0.00 +Inf% 1.43 ~22% lkp-t410/micro/netperf/300s-200%-SCTP_STREAM
0.00 +Inf% 2.65 ~22% TOTAL perf-profile.cpu-cycles.sctp_packet_transmit.sctp_packet_transmit_chunk.sctp_outq_flush.sctp_outq_uncork.sctp_cmd_interpreter

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
6.26 ~13% +306.9% 25.46 ~26% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
6.26 ~13% +306.9% 25.46 ~26% TOTAL perf-profile.cpu-cycles._raw_spin_lock_irqsave.clockevents_notify.intel_idle.cpuidle_enter_state.cpuidle_enter

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
966 ~45% -44.6% 535 ~29% lkp-t410/micro/netperf/300s-200%-SCTP_STREAM
966 ~45% -44.6% 535 ~29% TOTAL cpuidle.C1-NHM.time

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
0.45 ~33% +165.0% 1.20 ~14% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
0.48 ~37% +235.3% 1.62 ~12% lkp-t410/micro/netperf/300s-200%-SCTP_STREAM
0.93 ~35% +201.3% 2.81 ~13% TOTAL perf-profile.cpu-cycles.skb_copy_bits.skb_copy.sctp_make_reassembled_event.sctp_ulpq_tail_data.sctp_cmd_interpreter

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
0.80 ~32% -56.1% 0.35 ~38% lkp-t410/micro/netperf/300s-200%-SCTP_STREAM
0.80 ~32% -56.1% 0.35 ~38% TOTAL perf-profile.cpu-cycles.menu_select.cpuidle_select.cpu_startup_entry.start_secondary

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
5.08 ~26% -58.3% 2.12 ~21% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
1.34 ~27% +112.1% 2.85 ~ 9% lkp-t410/micro/netperf/300s-200%-SCTP_STREAM
6.43 ~26% -22.7% 4.97 ~14% TOTAL perf-profile.cpu-cycles.copy_user_generic_string.skb_copy_datagram_iovec.sctp_recvmsg.sock_common_recvmsg.sock_recvmsg

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
0.72 ~41% +69.4% 1.22 ~25% lkp-t410/micro/netperf/300s-200%-SCTP_STREAM
0.72 ~41% +69.4% 1.22 ~25% TOTAL perf-profile.cpu-cycles.unmap_single_vma.unmap_vmas.exit_mmap.mmput.do_exit

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
916917 ~ 0% +79.9% 1649300 ~ 0% kbuildx/micro/netperf/300s-200%-SCTP_STREAM
12832444 ~ 1% +115.7% 27683375 ~ 0% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
13749362 ~ 0% +113.3% 29332676 ~ 0% TOTAL proc-vmstat.pgalloc_normal

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
1175423 ~ 0% +79.7% 2111948 ~ 0% kbuildx/micro/netperf/300s-200%-SCTP_STREAM
12997556 ~ 0% +115.4% 27996526 ~ 0% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
1181153 ~ 0% +79.3% 2118015 ~ 0% lkp-t410/micro/netperf/300s-200%-SCTP_STREAM
15354133 ~ 0% +109.9% 32226491 ~ 0% TOTAL proc-vmstat.pgfree

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
257597 ~ 0% +79.3% 461743 ~ 0% kbuildx/micro/netperf/300s-200%-SCTP_STREAM
1179621 ~ 0% +79.4% 2116528 ~ 0% lkp-t410/micro/netperf/300s-200%-SCTP_STREAM
1437218 ~ 0% +79.4% 2578271 ~ 0% TOTAL proc-vmstat.pgalloc_dma32

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
138767 ~ 3% +102.3% 280793 ~ 0% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
12422 ~ 1% +46.0% 18142 ~ 2% lkp-t410/micro/netperf/300s-200%-SCTP_STREAM
151189 ~ 3% +97.7% 298935 ~ 0% TOTAL softirqs.NET_RX

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
2.37 ~18% +78.7% 4.23 ~14% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
2.37 ~18% +78.7% 4.23 ~14% TOTAL perf-profile.cpu-cycles._raw_spin_lock_irqsave.tick_broadcast_oneshot_control.clockevents_notify.intel_idle.cpuidle_enter_state

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
386789 ~27% +43.0% 553161 ~ 6% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
386789 ~27% +43.0% 553161 ~ 6% TOTAL numa-numastat.node0.local_node

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
388443 ~28% +42.8% 554814 ~ 6% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
388443 ~28% +42.8% 554814 ~ 6% TOTAL numa-numastat.node0.numa_hit

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
14.18 ~24% -32.9% 9.52 ~16% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
3.43 ~26% +54.6% 5.30 ~20% lkp-t410/micro/netperf/300s-200%-SCTP_STREAM
17.60 ~24% -15.8% 14.82 ~17% TOTAL perf-profile.cpu-cycles.copy_user_generic_string.sctp_user_addto_chunk.sctp_datamsg_from_user.sctp_sendmsg.inet_sendmsg

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
393446 ~24% +40.0% 550772 ~ 3% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
393446 ~24% +40.0% 550772 ~ 3% TOTAL numa-numastat.node2.local_node

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
397581 ~23% +39.6% 554907 ~ 3% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
397581 ~23% +39.6% 554907 ~ 3% TOTAL numa-numastat.node2.numa_hit

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
0.79 ~ 4% +42.7% 1.13 ~ 3% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
0.79 ~ 4% +42.7% 1.13 ~ 3% TOTAL turbostat.%c1

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
357508 ~ 9% +42.9% 510964 ~ 8% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
357508 ~ 9% +42.9% 510964 ~ 8% TOTAL numa-numastat.node1.numa_hit

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
355027 ~ 9% +43.0% 507656 ~ 7% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
355027 ~ 9% +43.0% 507656 ~ 7% TOTAL numa-numastat.node1.local_node

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
298703 ~12% +27.8% 381632 ~ 4% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
298703 ~12% +27.8% 381632 ~ 4% TOTAL numa-vmstat.node2.numa_local

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
1513199 ~ 0% +39.1% 2105308 ~ 0% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
1513199 ~ 0% +39.1% 2105308 ~ 0% TOTAL proc-vmstat.numa_local

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
1525603 ~ 0% +38.8% 2117713 ~ 0% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
1525603 ~ 0% +38.8% 2117713 ~ 0% TOTAL proc-vmstat.numa_hit

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
320874 ~14% +24.8% 400369 ~ 4% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
320874 ~14% +24.8% 400369 ~ 4% TOTAL numa-vmstat.node0.numa_local

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
323017 ~ 1% +32.8% 428933 ~ 1% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
323017 ~ 1% +32.8% 428933 ~ 1% TOTAL cpuidle.C3-NHM.usage

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
386570 ~ 9% +21.4% 469471 ~ 3% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
386570 ~ 9% +21.4% 469471 ~ 3% TOTAL numa-vmstat.node2.numa_hit

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
380244 ~12% +20.9% 459829 ~ 3% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
380244 ~12% +20.9% 459829 ~ 3% TOTAL numa-vmstat.node0.numa_hit

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
352316 ~ 4% +19.9% 422485 ~ 5% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
352316 ~ 4% +19.9% 422485 ~ 5% TOTAL numa-vmstat.node1.numa_local

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
380978 ~ 4% +18.6% 451706 ~ 5% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
380978 ~ 4% +18.6% 451706 ~ 5% TOTAL numa-vmstat.node1.numa_hit

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
119700 ~ 2% +18.6% 141993 ~ 1% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
119700 ~ 2% +18.6% 141993 ~ 1% TOTAL softirqs.SCHED

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
45876 ~ 4% -7.9% 42242 ~ 7% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
45876 ~ 4% -7.9% 42242 ~ 7% TOTAL numa-meminfo.node0.AnonPages

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
11467 ~ 4% -7.9% 10559 ~ 7% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
11467 ~ 4% -7.9% 10559 ~ 7% TOTAL numa-vmstat.node0.nr_anon_pages

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
184229 ~ 1% +14.4% 210833 ~ 0% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
184229 ~ 1% +14.4% 210833 ~ 0% TOTAL softirqs.TIMER

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
347 ~ 5% +140.0% 834 ~10% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
347 ~ 5% +140.0% 834 ~10% TOTAL interrupts.98:PCI-MSI-edge.eth0-TxRx-0

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
9125 ~ 4% +59.8% 14585 ~13% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
9125 ~ 4% +59.8% 14585 ~13% TOTAL interrupts.RES

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
338 ~ 6% +15.8% 392 ~ 4% kbuildx/micro/netperf/300s-200%-SCTP_STREAM
1830 ~ 0% +71.2% 3135 ~ 0% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
352 ~ 0% +20.5% 425 ~ 1% lkp-t410/micro/netperf/300s-200%-SCTP_STREAM
2522 ~ 1% +56.7% 3952 ~ 1% TOTAL vmstat.system.cs

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
171971 ~ 3% +29.8% 223248 ~ 1% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
171971 ~ 3% +29.8% 223248 ~ 1% TOTAL interrupts.LOC

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
839 ~ 3% +24.4% 1044 ~ 1% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
839 ~ 3% +24.4% 1044 ~ 1% TOTAL vmstat.system.in

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
8197 ~11% +32.2% 10835 ~ 7% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
1043 ~ 0% +15.2% 1202 ~ 3% lkp-t410/micro/netperf/300s-200%-SCTP_STREAM
9241 ~ 9% +30.3% 12037 ~ 7% TOTAL interrupts.PMI

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
8197 ~11% +32.2% 10835 ~ 7% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
1043 ~ 0% +15.2% 1202 ~ 3% lkp-t410/micro/netperf/300s-200%-SCTP_STREAM
9241 ~ 9% +30.3% 12037 ~ 7% TOTAL interrupts.NMI

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
0.73 ~ 4% +20.5% 0.88 ~ 6% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
0.94 ~ 0% +14.4% 1.08 ~ 1% lkp-t410/micro/netperf/300s-200%-SCTP_STREAM
1.67 ~ 2% +17.1% 1.96 ~ 3% TOTAL turbostat.%c0

bfae23249955819 362d52040c71f6e8d8158be48
--------------- -------------------------
17709 ~ 2% -4.1% 16985 ~ 1% lkp-nex04/micro/netperf/300s-200%-SCTP_STREAM
17709 ~ 2% -4.1% 16985 ~ 1% TOTAL interrupts.IWI

Legend:
~XX% - stddev percent
[+-]XX% - change percent

netperf.Throughput_Mbps

4.5 ++-------------------------------------------------------------------+
O O O O O O O O O O O O O O O O O O O O O O O O O O |
| |
4 ++ |
| |
| |
3.5 ++ |
| |
3 ++ |
| |
| |
2.5 ++ |
| |
*..*.*..*.*..*.*..*.*..*..*.*..*.*..*.*..*.*..*..*.*..*.*..*.*..*.*..*
2 ++-------------------------------------------------------------------+

[*] bisect-good sample
[O] bisect-bad sample

Thanks,
Fengguang
netserver
netperf -t SCTP_STREAM -c -C -l 300
netperf -t SCTP_STREAM -c -C -l 300
netperf -t SCTP_STREAM -c -C -l 300
netperf -t SCTP_STREAM -c -C -l 300
netperf -t SCTP_STREAM -c -C -l 300
netperf -t SCTP_STREAM -c -C -l 300
netperf -t SCTP_STREAM -c -C -l 300
netperf -t SCTP_STREAM -c -C -l 300

Next message: Fengguang Wu: "[raid5] kernel BUG at drivers/md/raid5.c:4374!"
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