reduce futex locking period
---------------------------
Key: TS-1034
URL: https://issues.apache.org/jira/browse/TS-1034
Project: Traffic Server
Issue Type: Improvement
Components: Core, HTTP
Affects Versions: 3.1.1
Reporter: Zhao Yongming
Assignee: Zhao Yongming
we need to reduce futex locking period, here is a simple testing in my 24cores
HP380 system, with 24 ab:
{codes}
#!/bin/sh
for i in {1..24}
do
ab -n 100000000 -c 16 -X 127.0.0.$i:8080
http://img02.taobaocdn.com/tps/i2/T1o0ypXk4wXXXXXXXX-1000-40.png?$i &
done
{codes}
result:
{codes}
Every 2.0s: echo show:proxy-stats | traffic_shell
Mon Nov 28 16:06:42 2011
Successfully Initialized MgmtAPI in /var/run/trafficserver
Document Hit Rate -------- 100.000000 % *
Bandwidth Saving --------- 100.000000 % *
Cache Percent Free ------- 99.999619 %
Open Server Connections -- 0
Open Client Connections -- 9
Open Cache Connections --- 2
Client Throughput -------- 6824.747070 MBit/Sec
Transaction Per Second --- 53914.925781
* Value represents 10 second average.
[[email protected] ~]# strace -c -p 11712
Process 11712 attached - interrupt to quit
^CProcess 11712 detached
% time seconds usecs/call calls errors syscall
------ ----------- ----------- --------- --------- ----------------
26.85 0.890335 15 58920 writev
24.45 0.810866 7 118147 epoll_ctl
22.27 0.738451 13 58920 close
11.50 0.381362 6 59227 getsockname
9.86 0.326843 3 119192 59228 read
3.53 0.117058 16 7100 1931 futex
1.53 0.050884 58 884 epoll_wait
0.00 0.000037 0 404 rt_sigprocmask
0.00 0.000000 0 3 write
0.00 0.000000 0 2 brk
0.00 0.000000 0 10 msync
------ ----------- ----------- --------- --------- ----------------
100.00 3.315836 422809 61159 total
[[email protected] ~]#
{codes}
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