Change Details

$ LD_PRELOAD=libsiginfo.so.0 python -c "import time; time.sleep(5)" ^T load: 0.98 cmd: python3.6 54161 [select] 0.49r 0.02u 0.00s 0% 10180k #0 0xffffffff80bd04f3 at mi_switch+0xd3 #1 0xffffffff80c2278e at sleepq_catch_signals+0x39e #2 0xffffffff80c23592 at sleepq_timedwait_sig+0x12 #3 0xffffffff80b58f6e at _cv_timedwait_sig_sbt+0xee #4 0xffffffff80c3307f at seltdwait+0xff #5 0xffffffff80c33c96 at kern_select.part.10+0x556 #6 0xffffffff80c355e5 at sys_select+0x65 #7 0xffffffff8119e290 at amd64_syscall+0x2b0 #8 0xffffffff81176690 at fast_syscall_common+0x101 -------------------- userspace -------------------- #1 0x0008007740fa at /lib/libc.so.7:__sys_select+0xa #2 0x0008002594b2 at /lib/libthr.so.3:_pthread_suspend_all_np+0x1632 #3 0x0008004b3ffc at /usr/local/lib/libpython3.6m.so.1.0:PyInit_time+0x61c #4 0x0008003bca36 at /usr/local/lib/libpython3.6m.so.1.0:_PyCFunction_FastCallDict+0x246 #5 0x00080043d355 at /usr/local/lib/libpython3.6m.so.1.0:PyEval_GetFuncDesc+0x225 #6 0x00080043a9f1 at /usr/local/lib/libpython3.6m.so.1.0:_PyEval_EvalFrameDefault+0x61e1 #7 0x00080043dbf0 at /usr/local/lib/libpython3.6m.so.1.0:PyEval_GetFuncDesc+0xac0 #8 0x000800434763 at /usr/local/lib/libpython3.6m.so.1.0:PyEval_EvalCode+0x33 #9 0x000800468d2d at /usr/local/lib/libpython3.6m.so.1.0:PyRun_StringFlags+0x8d #10 0x000800468c65 at /usr/local/lib/libpython3.6m.so.1.0:PyRun_SimpleStringFlags+0x45 #11 0x0008004835b1 at /usr/local/lib/libpython3.6m.so.1.0:Py_Main+0xa41 #12 0x0000002013c8 at /usr/local/bin/python:main+0xf8 #13 0x00000020110f at /usr/local/bin/python:_start+0x10f

$ LD_PRELOAD=libsiginfo.so.0 python -c "import time; time.sleep(5)" ^T load: 0.63 cmd: python3.6 69132 [select] 2.02r 0.01u 0.00s 0% 10180k #0 0xffffffff80bd04f3 at mi_switch+0xd3 #1 0xffffffff80c2278e at sleepq_catch_signals+0x39e #2 0xffffffff80c23592 at sleepq_timedwait_sig+0x12 #3 0xffffffff80b58f6e at _cv_timedwait_sig_sbt+0xee #4 0xffffffff80c3307f at seltdwait+0xff #5 0xffffffff80c33c96 at kern_select.part.10+0x556 #6 0xffffffff80c355e5 at sys_select+0x65 #7 0xffffffff8119e290 at amd64_syscall+0x2b0 #8 0xffffffff81176690 at fast_syscall_common+0x101 -------------------- userspace -------------------- #0 0x0008007740fa at /lib/libc.so.7:__sys_select+0xa #1 0x0008002594b2 at /lib/libthr.so.3:_pthread_suspend_all_np+0x1632 #2 0x0008004b3ffc at /usr/local/lib/libpython3.6m.so.1.0:PyInit_time+0x61c #3 0x0008003bca36 at /usr/local/lib/libpython3.6m.so.1.0:_PyCFunction_FastCallDict+0x246 #4 0x00080043d355 at /usr/local/lib/libpython3.6m.so.1.0:PyEval_GetFuncDesc+0x225 #5 0x00080043a9f1 at /usr/local/lib/libpython3.6m.so.1.0:_PyEval_EvalFrameDefault+0x61e1 #6 0x00080043dbf0 at /usr/local/lib/libpython3.6m.so.1.0:PyEval_GetFuncDesc+0xac0 #7 0x000800434763 at /usr/local/lib/libpython3.6m.so.1.0:PyEval_EvalCode+0x33 #8 0x000800468d2d at /usr/local/lib/libpython3.6m.so.1.0:PyRun_StringFlags+0x8d #9 0x000800468c65 at /usr/local/lib/libpython3.6m.so.1.0:PyRun_SimpleStringFlags+0x45 #10 0x0008004835b1 at /usr/local/lib/libpython3.6m.so.1.0:Py_Main+0xa41 #11 0x0000002013c8 at /usr/local/bin/python:main+0xf8 #12 0x00000020110f at /usr/local/bin/python:_start+0x10f

$ LD_PRELOAD=libsiginfo.so.0 python -c "import time; time.sleep(5)" ^T load: 0.9863 cmd: python3.6 5416169132 [select] 0.492.02r 0.02u 01u 0.00s 0% 10180k #0 0xffffffff80bd04f3 at mi_switch+0xd3 #1 0xffffffff80c2278e at sleepq_catch_signals+0x39e #2 0xffffffff80c23592 at sleepq_timedwait_sig+0x12 #3 0xffffffff80b58f6e at _cv_timedwait_sig_sbt+0xee #4 0xffffffff80c3307f at seltdwait+0xff #5 0xffffffff80c33c96 at kern_select.part.10+0x556 #6 0xffffffff80c355e5 at sys_select+0x65 #7 0xffffffff8119e290 at amd64_syscall+0x2b0 #8 0xffffffff81176690 at fast_syscall_common+0x101 -------------------- userspace -------------------- #1#0 0x0008007740fa at /lib/libc.so.7:__sys_select+0xa #2#1 0x0008002594b2 at /lib/libthr.so.3:_pthread_suspend_all_np+0x1632 #3#2 0x0008004b3ffc at /usr/local/lib/libpython3.6m.so.1.0:PyInit_time+0x61c #4#3 0x0008003bca36 at /usr/local/lib/libpython3.6m.so.1.0:_PyCFunction_FastCallDict+0x246 #5#4 0x00080043d355 at /usr/local/lib/libpython3.6m.so.1.0:PyEval_GetFuncDesc+0x225 #6#5 0x00080043a9f1 at /usr/local/lib/libpython3.6m.so.1.0:_PyEval_EvalFrameDefault+0x61e1 #7#6 0x00080043dbf0 at /usr/local/lib/libpython3.6m.so.1.0:PyEval_GetFuncDesc+0xac0 #8#7 0x000800434763 at /usr/local/lib/libpython3.6m.so.1.0:PyEval_EvalCode+0x33 #9#8 0x000800468d2d at /usr/local/lib/libpython3.6m.so.1.0:PyRun_StringFlags+0x8d #10#9 0x000800468c65 at /usr/local/lib/libpython3.6m.so.1.0:PyRun_SimpleStringFlags+0x45 #11#10 0x0008004835b1 at /usr/local/lib/libpython3.6m.so.1.0:Py_Main+0xa41 #12#11 0x0000002013c8 at /usr/local/bin/python:main+0xf8 #13#12 0x00000020110f at /usr/local/bin/python:_start+0x10f