ptitiano / cpuloadgen Goto Github PK

The system is dual core and I could create upto 100% load on both. But when I want to measure the performance of my program with varying load generated by cpuloadgen, it gives segmentation fault for loads abpve 75%. (For e.g. if 90% on each CPU). Didn't debug further.

SIGTERM is not enough to kill child processes when running cpuloadgen on multiple CPUs. Log below illustrates:

/sys/devices/system/cpu/cpu0/cpufreq # cpuloadgen &
/sys/devices/system/cpu/cpu0/cpufreq # CPULOADGEN (REV 0.94 built Wed Feb 26 18:51:18 PST 2014)

Press CTRL+C to stop load generation at any tating 100% load on CPU0...
Generating 100% load on CPU1...

/sys/devices/system/cpu/cpu0/cpufreq # ps
PID   USER     TIME   COMMAND
  ...
  118 root       0:04 cpuloadgen
  120 root       0:00 ps
/sys/devices/system/cpu/cpu0/cpufreq # killall cpuloadgen
Halting load generation.
/sys/devices/system/cpu/cpu0/cpufreq # ps
PID   USER     TIME   COMMAND
  ...
  118 root       0:18 cpuloadgen
  123 root       0:00 ps
/sys/devices/system/cpu/cpu0/cpufreq # killall -9 cpuloadgen
/sys/devices/system/cpu/cpu0/cpufreq #
[1]+  Killed       cpuloadgen
/sys/devices/system/cpu/cpu0/cpufreq #
/sys/devices/system/cpu/cpu0/cpufreq # ps
PID   USER     TIME   COMMAND
  127 root       0:00 ps

[604450.900970] [2018:07:04 16:55:26][pid:28206,cpu1,cpuloadgen]cpuloadgen[28206]: unhandled level 2 translation fault (11) at 0x00000000, esr 0x92000046
[604450.901000] [pid:28206,cpu1,cpuloadgen]pgd = ffffffcb45fb9000
[604450.901031] [pid:28206,cpu1,cpuloadgen][00000000] *pgd=0000000009685003, *pud=0000000009685003, *pmd=0000000000000000
[604450.901031] [pid:28206,cpu1,cpuloadgen]
[604450.901092] [pid:28206,cpu1,cpuloadgen]CPU: 1 PID: 28206 Comm: cpuloadgen Tainted: G W 4.4.23+ #1
[604450.901123] [pid:28206,cpu1,cpuloadgen]TGID: 28205 Comm: cpuloadgen
[604450.901123] [pid:28206,cpu1,cpuloadgen]Hardware name: kirin970 (DT)
[604450.901123] [pid:28206,cpu1,cpuloadgen]task: ffffffcbdb9eb400 ti: ffffffcb6649c250 task.ti: ffffffcb6649c250
[604450.901153] [pid:28206,cpu1,cpuloadgen]PC is at 0x40280c
[604450.901153] [pid:28206,cpu1,cpuloadgen]LR is at 0x4026ac
[604450.901153] [pid:28206,cpu1,cpuloadgen]pc : [<000000000040280c>] lr : [<00000000004026ac>] pstate: 80000000
[604450.901153] [pid:28206,cpu1,cpuloadgen]sp : 0000007bc90a3690
[604450.901184] [pid:28206,cpu1,cpuloadgen]x29: 0000007bc90a3690 x28: 0000000000000000
[604450.901184] [pid:28206,cpu1,cpuloadgen]x27: 0000000000800000 x26: 000000001efb46f0
[604450.901184] [pid:28206,cpu1,cpuloadgen]x25: 0000007bc90a39b0 x24: 000000000049e000
[604450.901214] [pid:28206,cpu1,cpuloadgen]x23: 0000007bc90a4160 x22: 000000000049e000
[604450.901214] [pid:28206,cpu1,cpuloadgen]x21: 000000000049d000 x20: 0000007ff91752d8
[604450.901245] [pid:28206,cpu1,cpuloadgen]x19: 0000000000000000 x18: 0000000000000000
[604450.901245] [pid:28206,cpu1,cpuloadgen]x17: 0000000000000001 x16: 0000000000002710
[604450.901275] [pid:28206,cpu1,cpuloadgen]x15: 00000000004a3510 x14: 000000000049e000
[604450.901275] [pid:28206,cpu1,cpuloadgen]x13: ffffffffffffffff x12: 0000000000000004
[604450.901306] [pid:28206,cpu1,cpuloadgen]x11: 000000000000001e x10: 0101010101010101
[604450.901336] [pid:28206,cpu1,cpuloadgen]x9 : 0000000000000004 x8 : 7f7f7f7f7f7f7f7f
[604450.901336] [pid:28206,cpu1,cpuloadgen]x7 : 1f535226301f2b4c x6 : 00000003001d1000
[604450.901336] [pid:28206,cpu1,cpuloadgen]x5 : 00101d0003000000 x4 : 0000000000000000
[604450.901367] [pid:28206,cpu1,cpuloadgen]x3 : 0000000000000000 x2 : 0000000000000000
[604450.901367] [pid:28206,cpu1,cpuloadgen]x1 : 0000007bbc002700 x0 : 0000000000000000
[604450.901397] [pid:28206,cpu1,cpuloadgen]
[604450.901428] [pid:28206,cpu1,cpuloadgen]potentially unexpected fatal signal 11.
[604450.901428] [pid:28206,cpu1,cpuloadgen]
[604450.901428] [pid:28206,cpu1,cpuloadgen]CPU: 1 PID: 28206 Comm: cpuloadgen Tainted: G W 4.4.23+ #1
[604450.901458] [pid:28206,cpu1,cpuloadgen]TGID: 28205 Comm: cpuloadgen
[604450.901458] [pid:28206,cpu1,cpuloadgen]Hardware name: kirin970 (DT)
[604450.901458] [pid:28206,cpu1,cpuloadgen]task: ffffffcbdb9eb400 ti: ffffffcb6649c250 task.ti: ffffffcb6649c250
[604450.901458] [pid:28206,cpu1,cpuloadgen]PC is at 0x40280c
[604450.901489] [pid:28206,cpu1,cpuloadgen]LR is at 0x4026ac
[604450.901489] [pid:28206,cpu1,cpuloadgen]pc : [<000000000040280c>] lr : [<00000000004026ac>] pstate: 80000000
[604450.901489] [pid:28206,cpu1,cpuloadgen]sp : 0000007bc90a3690
[604450.901489] [pid:28206,cpu1,cpuloadgen]x29: 0000007bc90a3690 x28: 0000000000000000
[604450.901519] [pid:28206,cpu1,cpuloadgen]x27: 0000000000800000 x26: 000000001efb46f0
[604450.901550] [pid:28206,cpu1,cpuloadgen]x25: 0000007bc90a39b0 x24: 000000000049e000
[604450.901580] [pid:28206,cpu1,cpuloadgen]x23: 0000007bc90a4160 x22: 000000000049e000
[604450.901580] [pid:28206,cpu1,cpuloadgen]x21: 000000000049d000 x20: 0000007ff91752d8
[604450.901580] [pid:28206,cpu1,cpuloadgen]x19: 0000000000000000 x18: 0000000000000000
[604450.901611] [pid:28206,cpu1,cpuloadgen]x17: 0000000000000001 x16: 0000000000002710
[604450.901611] [pid:28206,cpu1,cpuloadgen]x15: 00000000004a3510 x14: 000000000049e000
[604450.901641] [pid:28206,cpu1,cpuloadgen]x13: ffffffffffffffff x12: 0000000000000004
[604450.901641] [pid:28206,cpu1,cpuloadgen]x11: 000000000000001e x10: 0101010101010101
[604450.901672] [pid:28206,cpu1,cpuloadgen]x9 : 0000000000000004 x8 : 7f7f7f7f7f7f7f7f
[604450.901672] [pid:28206,cpu1,cpuloadgen]x7 : 1f535226301f2b4c x6 : 00000003001d1000
[604450.901672] [pid:28206,cpu1,cpuloadgen]x5 : 00101d0003000000 x4 : 0000000000000000
[604450.901702] [pid:28206,cpu1,cpuloadgen]x3 : 0000000000000000 x2 : 0000000000000000
[604450.901702] [pid:28206,cpu1,cpuloadgen]x1 : 0000007bbc002700 x0 : 0000000000000000
[604450.901733] [pid:28206,cpu1,cpuloadgen]