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Antnee/strace.txt

Last active November 19, 2019 16:43
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Slow Xdebug 2.8.0 Strace
Raw
strace.txt
% time seconds usecs/call calls errors syscall
------ ----------- ----------- --------- --------- ----------------
29.16 0.034135 2 20437 9 open
19.65 0.022995 1 20456 close
14.39 0.016840 1 25138 10055 access
8.61 0.010082 1 14542 poll
6.81 0.007972 1 5622 45 stat
4.65 0.005440 1 10127 17 lstat
4.26 0.004985 0 11774 write
4.08 0.004771 1 3333 getdents
3.90 0.004559 0 45619 read
2.54 0.002969 0 40045 fstat
0.75 0.000883 0 17450 lseek
0.46 0.000542 0 6414 sendto
0.40 0.000465 0 2562 munmap
0.15 0.000170 0 4290 getcwd
0.14 0.000164 0 2696 mmap
0.06 0.000070 1 127 mprotect
0.00 0.000000 0 302 brk
0.00 0.000000 0 80 rt_sigaction
0.00 0.000000 0 2 rt_sigprocmask
0.00 0.000000 0 23 13 ioctl
0.00 0.000000 0 4 pipe
0.00 0.000000 0 172 madvise
0.00 0.000000 0 883 getpid
0.00 0.000000 0 17 socket
0.00 0.000000 0 15 10 connect
0.00 0.000000 0 9425 recvfrom
0.00 0.000000 0 14 setsockopt
0.00 0.000000 0 7 getsockopt
0.00 0.000000 0 2 clone
0.00 0.000000 0 3 1 execve
0.00 0.000000 0 2 wait4
0.00 0.000000 0 86 uname
0.00 0.000000 0 27 fcntl
0.00 0.000000 0 2 chdir
0.00 0.000000 0 12 unlink
0.00 0.000000 0 5 readlink
0.00 0.000000 0 2 getrlimit
0.00 0.000000 0 1 sysinfo
0.00 0.000000 0 2 arch_prctl
0.00 0.000000 0 21 futex
0.00 0.000000 0 1 set_tid_address
0.00 0.000000 0 4 newfstatat
0.00 0.000000 0 1 set_robust_list
0.00 0.000000 0 5 sendmmsg
0.00 0.000000 0 1717 getrandom
------ ----------- ----------- --------- --------- ----------------
100.00 0.117042 243469 10150 total
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Antnee commented Nov 19, 2019

Here's a quick example of the sort of thing that I'm getting from a strace -r -Tfe trace=open vendor/bin/phpunit --testdox --colors=always --coverage-html report command:

 ◓ running tests     0.971306 open("/var/www/html/tests/../spool/phpunit", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 9 <0.001046>
 ◑ running tests     0.557823 open("/var/www/html/vendor/phpunit/phpunit/src/Framework/MockObject/Matcher/ConsecutiveParameters.php", O_RDONLY) = 9 <0.000551>
     0.020636 open("/var/www/html/vendor/phpunit/phpunit/src/Framework/MockObject/Stub/ConsecutiveCalls.php", O_RDONLY) = 9 <0.000791>
     0.053992 open("/var/www/html/src/Foo.php", O_RDONLY) = 9 <0.000989>
     1.311633 open("/var/www/html/vendor/phpunit/phpunit/src/Framework/MockObject/Stub/ConsecutiveCalls.php", O_RDONLY) = 9 <0.001083>
     0.006750 open("/var/www/html/src/Foo.php", O_RDONLY) = 9 <0.001176>
     0.005525 open("/var/www/html/vendor/phpunit/phpunit/src/Framework/MockObject/Matcher/ConsecutiveParameters.php", O_RDONLY) = 9 <0.000333>
     0.009173 open("/var/www/html/src/Foo.php", O_RDONLY) = 9 <0.000794>
     0.003583 open("/var/www/html/src/Foo.php", O_RDONLY) = 9 <0.000782>
 ◒ running tests     0.085541 open("/var/www/html/src/Bar.php", O_RDONLY) = 9 <0.000818>

App filenames obfuscated

There are a lot of very slow opens, and they come from all over the app, not just in the vendor/ directory as displayed above; I have them all over the app, and there's no obvious pattern to it, either

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