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Analysis for http://golang.org/issue/5643 on darwin/amd64.
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| $ time ./client_cpp | |
| real 1m48.071s | |
| user 0m1.955s | |
| sys 1m45.919s | |
| # ./trace.d | |
| dtrace: script './trace.d' matched 22 probes | |
| CPU ID FUNCTION:NAME | |
| 2 1 :BEGIN Tracing... | |
| 0 1599 kco_ma_addsample:exec ./server_cpp process starting | |
| 3 1599 kco_ma_addsample:exec ./client_cpp process starting | |
| 1 1596 exit1:exit server_cpp process exiting 1 | |
| 2 1596 exit1:exit client_cpp process exiting 1 | |
| ^C | |
| 0 2 :END Summary: | |
| server_cpp write_nocancel | |
| value ------------- Distribution ------------- count | |
| 4 | 0 | |
| 8 |@@@@@@@@@@@@@ 1 | |
| 16 |@@@@@@@@@@@@@ 1 | |
| 32 |@@@@@@@@@@@@@ 1 | |
| 64 | 0 | |
| server_cpp recvfrom | |
| value ------------- Distribution ------------- count | |
| -1 | 0 | |
| 0 | 1 | |
| 1 | 0 | |
| 2 |@@@@@@@@@@@@@@@@@ 2406802 | |
| 4 |@@@@@@@@@@@@@@@@@@@@@@@ 3275080 | |
| 8 | 12043 | |
| 16 | 4013 | |
| 32 | 2165 | |
| 64 | 798 | |
| 128 | 443 | |
| 256 | 86 | |
| 512 | 30 | |
| 1024 | 22 | |
| 2048 | 0 | |
| client_cpp sendto | |
| value ------------- Distribution ------------- count | |
| 1 | 0 | |
| 2 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 10000000 | |
| 4 | 0 |
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| $ time ./client_go --nodelay=false | |
| real 2m5.117s | |
| user 0m11.349s | |
| sys 1m53.571s | |
| # ./trace.d | |
| dtrace: script './trace.d' matched 22 probes | |
| CPU ID FUNCTION:NAME | |
| 1 1 :BEGIN Tracing... | |
| 0 1599 kco_ma_addsample:exec ./server_cpp process starting | |
| 1 1599 kco_ma_addsample:exec ./client_go process starting | |
| 0 1596 exit1:exit server_cpp process exiting 1 | |
| 2 1596 exit1:exit client_go process exiting 1 | |
| ^C | |
| 3 2 :END Summary: | |
| client_go read | |
| value ------------- Distribution ------------- count | |
| 16 | 0 | |
| 32 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 1 | |
| 64 | 0 | |
| server_cpp write_nocancel | |
| value ------------- Distribution ------------- count | |
| 4 | 0 | |
| 8 |@@@@@@@@@@@@@ 1 | |
| 16 |@@@@@@@@@@@@@ 1 | |
| 32 |@@@@@@@@@@@@@ 1 | |
| 64 | 0 | |
| server_cpp recvfrom | |
| value ------------- Distribution ------------- count | |
| -1 | 0 | |
| 0 | 1 | |
| 1 | 0 | |
| 2 |@@@@@@@@@@@@@@@@@@@@@@@ 3798634 | |
| 4 |@@@@@@@@@@@@@@@@@ 2926728 | |
| 8 | 8887 | |
| 16 | 3438 | |
| 32 | 1932 | |
| 64 | 633 | |
| 128 | 373 | |
| 256 | 167 | |
| 512 | 104 | |
| 1024 | 37 | |
| 2048 | 0 | |
| client_go write | |
| value ------------- Distribution ------------- count | |
| 1 | 0 | |
| 2 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 10000000 | |
| 4 | 0 |
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| $ time ./client_go --nodelay=true | |
| real 2m48.513s | |
| user 0m12.503s | |
| sys 2m35.810s | |
| # ./trace.d | |
| dtrace: script './trace.d' matched 22 probes | |
| CPU ID FUNCTION:NAME | |
| 2 1 :BEGIN Tracing... | |
| 2 1599 kco_ma_addsample:exec ./server_cpp process starting | |
| 1 1599 kco_ma_addsample:exec ./client_go process starting | |
| 0 1596 exit1:exit server_cpp process exiting 1 | |
| 1 1596 exit1:exit client_go process exiting 1 | |
| ^C | |
| 0 2 :END Summary: | |
| client_go read | |
| value ------------- Distribution ------------- count | |
| 16 | 0 | |
| 32 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 1 | |
| 64 | 0 | |
| server_cpp write_nocancel | |
| value ------------- Distribution ------------- count | |
| 4 | 0 | |
| 8 |@@@@@@@@@@@@@ 1 | |
| 16 |@@@@@@@@@@@@@ 1 | |
| 32 |@@@@@@@@@@@@@ 1 | |
| 64 | 0 | |
| server_cpp recvfrom | |
| value ------------- Distribution ------------- count | |
| -1 | 0 | |
| 0 | 1 | |
| 1 | 0 | |
| 2 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 9705811 | |
| 4 | 71616 | |
| 8 | 14109 | |
| 16 | 2711 | |
| 32 | 953 | |
| 64 | 285 | |
| 128 | 87 | |
| 256 | 25 | |
| 512 | 7 | |
| 1024 | 4 | |
| 2048 | 0 | |
| client_go write | |
| value ------------- Distribution ------------- count | |
| 1 | 0 | |
| 2 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 10000000 | |
| 4 | 0 |
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| #!/usr/sbin/dtrace -s | |
| /* http://www.tablespace.net/quicksheet/dtrace-quickstart.html */ | |
| dtrace:::BEGIN | |
| { | |
| printf("Tracing...\n"); | |
| } | |
| proc:::exec | |
| /args[0] == "./server_cpp" || args[0] == "./client_cpp" || args[0] == "./client_go"/ | |
| { | |
| printf("%s process starting", args[0]); | |
| } | |
| proc:::exit | |
| /execname == "server_cpp" || execname == "client_cpp" || execname == "client_go"/ | |
| { | |
| printf("%s process exiting %d", execname, args[0]); | |
| } | |
| syscall::read*:return, syscall::write*:return, | |
| syscall::send*:return, syscall::recv*:return | |
| /execname == "server_cpp" || execname == "client_cpp" || execname == "client_go"/ | |
| { | |
| @Sizes[execname, probefunc] = quantize(arg0); | |
| } | |
| END | |
| { | |
| printf("Summary:"); | |
| printa(@Sizes); | |
| } |
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