Server : Apache System : Linux server2.corals.io 4.18.0-348.2.1.el8_5.x86_64 #1 SMP Mon Nov 15 09:17:08 EST 2021 x86_64 User : corals ( 1002) PHP Version : 7.4.33 Disable Function : exec,passthru,shell_exec,system Directory :  /proc/thread-self/root/opt/rh/gcc-toolset-11/root/usr/share/systemtap/examples/io/

Upload File : current_dir [ Writeable ] document_root [ Writeable ]

#!/opt/rh/gcc-toolset-11/root/usr/bin/stap
global opens, reads, writes, totals

probe begin { printf("starting probe\n") }

probe syscall.open {
  opens[execname()] <<< 1 # statistics array
}

probe syscall.read.return {
  count = retval
  if ( count >= 0 ) {
    reads[execname()] <<< count # statistics array
    totals[execname()] <<< count
  }
}

probe syscall.write.return {
  count = retval
  if (count >= 0 ) {
    writes[execname()] <<< count # statistics array
    totals[execname()] <<< count
  }
}

probe end {
  printf("\n%16s %8s %8s %8s %8s %8s %8s %8s\n",
    "", "", "", "read", "read", "", "write", "write")
  printf("%16s %8s %8s %8s %8s %8s %8s %8s\n",
    "name", "open", "read", "KB tot", "B avg", "write", "KB tot", "B avg")
  foreach (name in totals @sum- limit 20) { # sort by total io
    printf("%16s %8d %8d %8d %8d %8d %8d %8d\n",
      name, @count(opens[name]),
      @count(reads[name]),
      (@count(reads[name]) ? @sum(reads[name])>>10 : 0 ),
      (@count(reads[name]) ? @avg(reads[name]) : 0 ),
      @count(writes[name]),
      (@count(writes[name]) ? @sum(writes[name])>>10 : 0 ),
      (@count(writes[name]) ? @avg(writes[name]) : 0 ))
  }
}