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test/benchmark/cmp_table.sh - ktap

  1. #!/bin/sh

  3. # This script compare table performance between ktap and stap.
  4. #
  5. # 1. ktap -e 'trace syscalls:sys_enter_futex { s[execname] += 1 }'
  6. # 2. ktap -e 'kdebug.tracepoint("sys_enter_futex", function () { s[execname] += 1 })'
  7. # 3. ktap -e 'kdebug.kprobe("SyS_futex", function () { s[execname] += 1 })'
  8. # 4. stap -e 'probe syscall.futex { s[execname()] += 1 }'
  9. # 5. ktap -e 'kdebug.kprobe("SyS_futex", function () { s[probename] += 1 })'
  10. # 6. stap -e 'probe syscall.futex { s[name] += 1 }'
  11. # 7. ktap -e 'kdebug.kprobe("SyS_futex", function () { s["constant_string_key"] += 1 })'
  12. # 8. stap -e 'probe syscall.futex { s["constant_string_key"] += 1 }'

  14. #Result:
  15. #Currently ktap table operation overhead is smaller than stap.


  18. gcc -o sembench sembench.c -O2 -lpthread

  20. COMMAND="./sembench -t 200 -w 20 -r 30 -o 2"

  22. #------------------------------------------------------------#

  24. echo -e "without tracing:"
  25. $COMMAND; $COMMAND; $COMMAND

  27. #------------------------------------------------------------#

  29. ../../ktap -q -e 'var s = {} trace syscalls:sys_enter_futex { s[execname] += 1 }' &

  31. echo -e "\nktap tracing: trace syscalls:sys_enter_futex { s[execname] += 1 }"
  32. $COMMAND; $COMMAND; $COMMAND
  33. pid=`pidof ktap`
  34. disown $pid; kill -9 $pid; sleep 1

  36. #------------------------------------------------------------#

  38. ../../ktap -q -e 'var s = {} kdebug.tracepoint("sys_enter_futex", function () {
  39.     s[execname] += 1 })' &

  41. echo -e '\nktap tracing: kdebug.tracepoint("sys_enter_futex", function () { s[execname] += 1})'
  42. $COMMAND; $COMMAND; $COMMAND
  43. pid=`pidof ktap`
  44. disown $pid; kill -9 $pid; sleep 1

  46. #------------------------------------------------------------#

  48. ../../ktap -q -e 'var s = {} kdebug.kprobe("SyS_futex", function () {
  49.     s[execname] += 1 })' &

  51. echo -e '\nktap tracing: kdebug.kprobe("SyS_futex", function () { s[execname] += 1 })'
  52. $COMMAND; $COMMAND; $COMMAND
  53. pid=`pidof ktap`
  54. disown $pid; kill -9 $pid; sleep 1

  56. #------------------------------------------------------------#

  58. stap -e 'global s; probe syscall.futex { s[execname()] += 1 }' &

  60. echo -e "\nstap tracing: probe syscall.futex { s[execname()] += 1 }"
  61. $COMMAND; $COMMAND; $COMMAND
  62. pkill stap

  64. #------------------------------------------------------------#

  66. ../../ktap -q -e 'var s = {} kdebug.kprobe("SyS_futex", function () {
  67.     s[probename] += 1 })' &

  69. echo -e '\nktap tracing: kdebug.kprobe("SyS_futex", function () { s[probename] += 1 })'
  70. $COMMAND; $COMMAND; $COMMAND
  71. pid=`pidof ktap`
  72. disown $pid; kill -9 $pid; sleep 1

  74. #------------------------------------------------------------#

  76. stap -e 'global s; probe syscall.futex { s[name] += 1 }' &

  78. echo -e "\nstap tracing: probe syscall.futex { s[name] += 1 }"
  79. $COMMAND; $COMMAND; $COMMAND
  80. pkill stap

  82. #------------------------------------------------------------#

  84. ../../ktap -q -e 'var s = {} s["const_string_key"] = 0 kdebug.kprobe("SyS_futex", function () {
  85.     s["const_string_key"] += 1 })' &

  87. echo -e '\nktap tracing: kdebug.kprobe("SyS_futex", function () { s["const_string_key"] += 1 })'
  88. $COMMAND; $COMMAND; $COMMAND
  89. pid=`pidof ktap`
  90. disown $pid; kill -9 $pid; sleep 1

  92. #------------------------------------------------------------#

  94. stap -e 'global s; probe syscall.futex { s["const_string_key"] += 1 }' &

  96. echo -e "\nstap tracing: probe syscall.futex { s["const_string_key"] += 1 }"
  97. $COMMAND; $COMMAND; $COMMAND
  98. pkill stap

  100. #------------------------------------------------------------#

  102. stap -o /dev/null -e 'global s; probe syscall.futex { s["const_string_key"] <<< 1 }' &

  104. echo -e "\nstap tracing: probe syscall.futex { s["const_string_key"] <<< 1 }"
  105. $COMMAND; $COMMAND; $COMMAND
  106. pkill stap

  108. #------------------------------------------------------------#


  111. rm -rf ./sembench

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