CODEWITHSUNDEEP
phpperformanceoptimizationlinux-kernellitespeed
Phuc Pham
Phuc Pham

Reputation: 378

Command getppid() takes 1 second each execution

I am trying to solve the high CPU issue, when tracing one of lsphp process, I see the command getppid() take more than 1 second each execution. See trace log below:

strace: Process 21945 attached
     0.000000 select(5, 0x7fffadebf9e0, NULL, NULL, 0x7fffadebf9d0) = 0 (Timeout)
     0.992306 getppid()                 = 31441
     0.000169 select(5, 0x7fffadebf9e0, NULL, NULL, 0x7fffadebf9d0) = 1 (in [4], left 0x7fffadebf9d0)
     0.714351 accept(4, 0x7fffadebf920, 0x7fffadebf91c) = -1 EAGAIN (Resource temporarily unavailable)
     0.000121 select(5, 0x7fffadebf9e0, NULL, NULL, 0x7fffadebf9d0) = 0 (Timeout)
     1.000415 getppid()                 = 31441
     0.000030 select(5, 0x7fffadebf9e0, NULL, NULL, 0x7fffadebf9d0) = 0 (Timeout)
     1.001052 getppid()                 = 31441
     0.000030 select(5, 0x7fffadebf9e0, NULL, NULL, 0x7fffadebf9d0) = 0 (Timeout)
     1.000785 getppid()                 = 31441
     0.000083 select(5, 0x7fffadebf9e0, NULL, NULL, 0x7fffadebf9d0) = 0 (Timeout)
     1.000875 getppid()                 = 31441
     0.000038 select(5, 0x7fffadebf9e0, NULL, NULL, 0x7fffadebf9d0) = 0 (Timeout)

Can somebody tell me how can I reduce the time spent for this command?

Upvotes: 1

Views: 34

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