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Date: Tue, 1 Apr 2014 11:56:59 +0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc: LKML <linux-kernel@...r.kernel.org>,
Linux Memory Management List <linux-mm@...ck.org>,
lkp@...org
Subject: [map_pages] 5449f33f982: +1.7% netperf.Throughput_Mbps
Hi Kirill,
FYI, we noticed the below (good) changes on
commit 5449f33f982905593117556d9d368d85eea8d13b ("mm: implement ->map_pages for page cache")
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
5044 ~ 0% +1.7% 5128 ~ 0% lkp-nex05/micro/netperf/120s-200%-TCP_SENDFILE
5044 ~ 0% +1.7% 5128 ~ 0% TOTAL netperf.Throughput_Mbps
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
1588009 ~ 2% -54.9% 716407 ~ 3% lkp-nex04/micro/netperf/120s-200%-UDP_RR
1500063 ~ 3% -55.7% 664357 ~ 4% lkp-nex05/micro/netperf/120s-200%-TCP_SENDFILE
3088072 ~ 2% -55.3% 1380765 ~ 4% TOTAL proc-vmstat.pgfault
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
1446 ~ 0% +93.0% 2792 ~ 2% lkp-nex04/micro/netperf/120s-200%-UDP_RR
1453 ~ 0% +91.1% 2777 ~ 1% lkp-nex05/micro/netperf/120s-200%-TCP_SENDFILE
2900 ~ 0% +92.1% 5569 ~ 1% TOTAL time.maximum_resident_set_size
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
2.94 ~ 6% -37.0% 1.85 ~ 4% lkp-nex04/micro/netperf/120s-200%-UDP_RR
2.94 ~ 6% -37.0% 1.85 ~ 4% TOTAL perf-profile.cpu-cycles.inet_putpeer.__ip_select_ident.__ip_make_skb.ip_make_skb.udp_sendmsg
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
272158 ~22% -28.4% 194888 ~10% lkp-nex04/micro/netperf/120s-200%-UDP_RR
272158 ~22% -28.4% 194888 ~10% TOTAL numa-vmstat.node1.numa_local
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
1.38 ~ 5% +47.5% 2.04 ~ 2% lkp-nex04/micro/netperf/120s-200%-UDP_RR
1.38 ~ 5% +47.5% 2.04 ~ 2% TOTAL perf-profile.cpu-cycles.__udp4_lib_lookup.__udp4_lib_rcv.udp_rcv.ip_local_deliver.ip_rcv
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
298658 ~20% -25.7% 221766 ~ 9% lkp-nex04/micro/netperf/120s-200%-UDP_RR
298658 ~20% -25.7% 221766 ~ 9% TOTAL numa-vmstat.node1.numa_hit
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
2.98 ~14% -22.7% 2.31 ~12% lkp-nex04/micro/netperf/120s-200%-UDP_RR
2.98 ~14% -22.7% 2.31 ~12% TOTAL perf-profile.cpu-cycles.__ip_select_ident.__ip_make_skb.ip_make_skb.udp_sendmsg.inet_sendmsg
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
10092 ~ 4% +35.2% 13642 ~ 4% lkp-nex04/micro/netperf/120s-200%-UDP_RR
10351 ~ 3% +31.2% 13579 ~ 1% lkp-nex05/micro/netperf/120s-200%-TCP_SENDFILE
20443 ~ 3% +33.2% 27222 ~ 2% TOTAL meminfo.Mapped
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
2470 ~ 1% +39.0% 3435 ~ 6% lkp-nex04/micro/netperf/120s-200%-UDP_RR
2470 ~ 1% +39.0% 3435 ~ 6% TOTAL numa-meminfo.node2.Mapped
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
620 ~ 1% +40.1% 868 ~10% lkp-nex04/micro/netperf/120s-200%-UDP_RR
620 ~ 1% +40.1% 868 ~10% TOTAL numa-vmstat.node2.nr_mapped
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
662 ~12% +24.8% 826 ~ 1% lkp-nex04/micro/netperf/120s-200%-UDP_RR
782 ~ 2% +33.7% 1046 ~ 1% lkp-nex05/micro/netperf/120s-200%-TCP_SENDFILE
1444 ~ 6% +29.7% 1873 ~ 1% TOTAL numa-vmstat.node1.nr_mapped
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
618 ~ 1% +33.6% 825 ~ 2% lkp-nex04/micro/netperf/120s-200%-UDP_RR
780 ~ 2% +39.0% 1085 ~ 7% lkp-nex05/micro/netperf/120s-200%-TCP_SENDFILE
1398 ~ 2% +36.6% 1911 ~ 5% TOTAL numa-vmstat.node3.nr_mapped
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
2476 ~ 2% +33.7% 3310 ~ 1% lkp-nex04/micro/netperf/120s-200%-UDP_RR
3297 ~11% +33.4% 4398 ~ 8% lkp-nex05/micro/netperf/120s-200%-TCP_SENDFILE
5773 ~ 7% +33.5% 7709 ~ 5% TOTAL numa-meminfo.node3.Mapped
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
2625 ~10% +26.8% 3327 ~ 1% lkp-nex04/micro/netperf/120s-200%-UDP_RR
3171 ~ 2% +33.1% 4222 ~ 2% lkp-nex05/micro/netperf/120s-200%-TCP_SENDFILE
5796 ~ 5% +30.3% 7550 ~ 1% TOTAL numa-meminfo.node1.Mapped
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
622 ~ 0% +33.6% 831 ~ 1% lkp-nex04/micro/netperf/120s-200%-UDP_RR
978 ~ 8% +25.0% 1222 ~ 3% lkp-nex05/micro/netperf/120s-200%-TCP_SENDFILE
1601 ~ 5% +28.3% 2054 ~ 2% TOTAL numa-vmstat.node0.nr_mapped
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
2582 ~ 4% +32.1% 3412 ~ 2% lkp-nex04/micro/netperf/120s-200%-UDP_RR
2542 ~ 2% +33.5% 3394 ~ 3% lkp-nex05/micro/netperf/120s-200%-TCP_SENDFILE
5124 ~ 3% +32.8% 6806 ~ 2% TOTAL proc-vmstat.nr_mapped
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
2508 ~ 1% +39.5% 3499 ~ 9% lkp-nex04/micro/netperf/120s-200%-UDP_RR
4040 ~10% +22.6% 4952 ~ 3% lkp-nex05/micro/netperf/120s-200%-TCP_SENDFILE
6549 ~ 6% +29.1% 8452 ~ 5% TOTAL numa-meminfo.node0.Mapped
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
14667 ~ 9% +12.6% 16520 ~ 9% lkp-nex04/micro/netperf/120s-200%-UDP_RR
14667 ~ 9% +12.6% 16520 ~ 9% TOTAL numa-meminfo.node3.AnonPages
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
14436 ~ 9% +12.5% 16244 ~10% lkp-nex04/micro/netperf/120s-200%-UDP_RR
14436 ~ 9% +12.5% 16244 ~10% TOTAL numa-meminfo.node3.Active(anon)
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
1.24 ~ 4% +21.2% 1.50 ~ 7% lkp-nex04/micro/netperf/120s-200%-UDP_RR
1.24 ~ 4% +21.2% 1.50 ~ 7% TOTAL perf-profile.cpu-cycles.__schedule.schedule.schedule_timeout.__skb_recv_datagram.udp_recvmsg
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
1.29 ~ 8% +12.1% 1.45 ~ 6% lkp-nex04/micro/netperf/120s-200%-UDP_RR
1.29 ~ 8% +12.1% 1.45 ~ 6% TOTAL perf-profile.cpu-cycles.__ip_route_output_key.ip_route_output_flow.udp_sendmsg.inet_sendmsg.sock_sendmsg
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
2825 ~ 4% +7.4% 3034 ~ 4% lkp-nex05/micro/netperf/120s-200%-TCP_SENDFILE
2825 ~ 4% +7.4% 3034 ~ 4% TOTAL slabinfo.signal_cache.active_objs
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
2825 ~ 4% +7.8% 3046 ~ 3% lkp-nex05/micro/netperf/120s-200%-TCP_SENDFILE
2825 ~ 4% +7.8% 3046 ~ 3% TOTAL slabinfo.signal_cache.num_objs
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
0.96 ~ 2% -8.3% 0.88 ~ 1% lkp-nex05/micro/netperf/120s-200%-TCP_SENDFILE
0.96 ~ 2% -8.3% 0.88 ~ 1% TOTAL perf-profile.cpu-cycles.splice_from_pipe_feed.__splice_from_pipe.splice_from_pipe.generic_splice_sendpage.direct_splice_actor
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
5236 ~ 1% -35.7% 3365 ~ 3% lkp-nex04/micro/netperf/120s-200%-UDP_RR
5343 ~ 1% -35.4% 3449 ~ 1% lkp-nex05/micro/netperf/120s-200%-TCP_SENDFILE
10579 ~ 1% -35.6% 6814 ~ 2% TOTAL time.minor_page_faults
d6c1ccefdbdf13a 5449f33f982905593117556d9
--------------- -------------------------
2783688 ~ 1% -1.6% 2738371 ~ 0% lkp-nex05/micro/netperf/120s-200%-TCP_SENDFILE
2783688 ~ 1% -1.6% 2738371 ~ 0% TOTAL vmstat.system.cs
Legend:
~XX% - stddev percent
[+-]XX% - change percent
time.minor_page_faults
5500 *+---*-----*----*------------*----*-*--*-*---*--*-----------------*-*
| *. *.* * *.*..*.*.* * * *.*.*..*.*.*.*. |
| |
5000 ++ |
| |
| |
4500 ++ |
| |
4000 ++ |
| |
| |
3500 ++ 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 |
| |
3000 ++------------------------------------------------------------------+
[*] bisect-good sample
[O] bisect-bad sample
Thanks,
Fengguang
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