% sudo strace -ttT -f -p 10140 strace: Process 10140 attached with 3 threads strace: [ Process PID=10140 runs in x32 mode. ] [pid 13143] 13:35:30.820722 read(8, [pid 10250] 13:35:30.823406 read(6, [pid 10140] 13:35:31.312294 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, 0x7fffffffcc20) = 0 <0.003788> strace: [ Process PID=10140 runs in 64 bit mode. ] [pid 10140] 13:35:31.318575 write(7, "\0", 1 [pid 10250] 13:35:31.323180 <... read resumed> "\0", 1) = 1 <0.499027> [pid 10250] 13:35:31.329065 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 <0.001107> [pid 10250] 13:35:31.331693 read(6, [pid 10140] 13:35:31.332710 <... write resumed> ) = 1 <0.013977> [pid 10140] 13:35:33.188267 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=3750, tv_nsec=112767576}) = 0 <0.001919> [pid 10140] 13:35:33.216968 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 <0.001985> [pid 10140] 13:35:33.880663 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=3750, tv_nsec=709946978}) = 0 <0.002838> [pid 10140] 13:35:33.886214 write(7, "\0", 1 [pid 10250] 13:35:33.888731 <... read resumed> "\0", 1) = 1 <2.556902> [pid 10140] 13:35:33.896634 <... write resumed> ) = 1 <0.010298> [pid 10140] 13:35:33.898213 futex(0x666de8, FUTEX_WAIT_PRIVATE, 2, NULL [pid 10250] 13:35:33.921837 futex(0x666de8, FUTEX_WAKE_PRIVATE, 1 [pid 10140] 13:35:33.925186 <... futex resumed> ) = 0 <0.026856> [pid 10140] 13:35:33.927785 futex(0x666de8, FUTEX_WAKE_PRIVATE, 1) = 0 <0.001744> [pid 10250] 13:35:33.937726 <... futex resumed> ) = 1 <0.015789> [pid 10250] 13:35:33.942988 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 <0.001089> [pid 10250] 13:35:33.944707 read(6, [pid 10140] 13:35:35.930090 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=3752, tv_nsec=123380260}) = 0 <0.005528> [pid 10140] 13:35:35.977354 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 <0.002024> [pid 10140] 13:35:36.644263 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=3752, tv_nsec=725913247}) = 0 <0.001936> [pid 10140] 13:35:36.649385 write(7, "\0", 1 [pid 10250] 13:35:36.651716 <... read resumed> "\0", 1) = 1 <2.706890> [pid 10250] 13:35:36.655200 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 <0.003290> [pid 10250] 13:35:36.659577 read(6, [pid 10140] 13:35:36.660170 <... write resumed> ) = 1 <0.010667> [pid 10140] 13:35:38.771468 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=3754, tv_nsec=576919624}) = 0 <0.001902> [pid 10140] 13:35:38.800701 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 <0.002017> [pid 10140] 13:35:39.455377 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=3755, tv_nsec=180223034}) = 0 <0.001974> [pid 10140] 13:35:39.460071 write(7, "\0", 1 [pid 10250] 13:35:39.461727 <... read resumed> "\0", 1) = 1 <2.802029> [pid 10140] 13:35:39.472650 <... write resumed> ) = 1 <0.012421> [pid 10140] 13:35:39.475736 futex(0x7ffff7a7d240, FUTEX_WAIT_PRIVATE, 2, NULL [pid 10250] 13:35:39.476840 futex(0x7ffff7a7d240, FUTEX_WAKE_PRIVATE, 1) = 1 <0.000875> [pid 10140] 13:35:39.478170 <... futex resumed> ) = 0 <0.002304> [pid 10140] 13:35:39.478280 futex(0x7ffff7a7d240, FUTEX_WAKE_PRIVATE, 1) = 0 <0.000017> [pid 10140] 13:35:39.478521 futex(0x666de8, FUTEX_WAIT_PRIVATE, 2, NULL [pid 10250] 13:35:39.494055 futex(0x666de8, FUTEX_WAKE_PRIVATE, 1 [pid 10140] 13:35:39.496744 <... futex resumed> ) = 0 <0.018092> [pid 10140] 13:35:39.499305 futex(0x666de8, FUTEX_WAKE_PRIVATE, 1) = 0 <0.000558> [pid 10250] 13:35:39.509786 <... futex resumed> ) = 1 <0.015555> [pid 10250] 13:35:39.511288 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 <0.000654> [pid 10250] 13:35:39.513681 read(6, [pid 10140] 13:35:41.455881 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=3756, tv_nsec=874570117}) = 0 <0.000030> [pid 10140] 13:35:41.485881 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 <0.003415> [pid 10140] 13:35:42.167682 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=3757, tv_nsec=513402255}) = 0 <0.001916> [pid 10140] 13:35:42.172439 write(7, "\0", 1 [pid 10250] 13:35:42.175071 <... read resumed> "\0", 1) = 1 <2.661221> [pid 10250] 13:35:42.178622 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 <0.004853> [pid 10250] 13:35:42.184506 read(6, [pid 10140] 13:35:42.185165 <... write resumed> ) = 1 <0.012585> [pid 10140] 13:35:44.374100 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=3759, tv_nsec=438187860}) = 0 <0.001942> [pid 10140] 13:35:44.404482 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 <0.002011> [pid 10140] 13:35:45.094628 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=3759, tv_nsec=993312116}) = 0 <0.001931> [pid 10140] 13:35:45.099942 write(7, "\0", 1 [pid 10250] 13:35:45.101717 <... read resumed> "\0", 1) = 1 <2.917065> [pid 10140] 13:35:45.111662 <... write resumed> ) = 1 <0.011597> [pid 10140] 13:35:45.112883 futex(0x666de8, FUTEX_WAIT_PRIVATE, 2, NULL [pid 10250] 13:35:45.132981 futex(0x666de8, FUTEX_WAKE_PRIVATE, 1 [pid 10140] 13:35:45.136329 <... futex resumed> ) = 0 <0.023304> [pid 10140] 13:35:45.139056 futex(0x666de8, FUTEX_WAKE_PRIVATE, 1) = 0 <0.001001> [pid 10250] 13:35:45.150627 <... futex resumed> ) = 1 <0.017563> [pid 10250] 13:35:45.152451 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 <0.000501> [pid 10250] 13:35:45.160726 read(6, [pid 10140] 13:35:47.090027 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=3761, tv_nsec=717433848}) = 0 <0.002881> [pid 10140] 13:35:47.123052 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 <0.002039> [pid 10140] 13:35:47.823930 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=3762, tv_nsec=341071731}) = 0 <0.001943> [pid 10140] 13:35:47.828723 write(7, "\0", 1 [pid 10250] 13:35:47.831330 <... read resumed> "\0", 1) = 1 <2.670459> [pid 10250] 13:35:47.836839 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 <0.000718> [pid 10250] 13:35:47.838269 read(6, [pid 10140] 13:35:47.838879 <... write resumed> ) = 1 <0.010040> [pid 10140] 13:35:50.178323 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=3764, tv_nsec=353555080}) = 0 <0.001956> [pid 10140] 13:35:50.207095 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 <0.002028> [pid 10140] 13:35:50.839987 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {tv_sec=3764, tv_nsec=922150260}) = 0 <0.001959> [pid 10140] 13:35:50.844727 write(7, "\0", 1 [pid 10250] 13:35:50.846726 <... read resumed> "\0", 1) = 1 <3.008346> [pid 10140] 13:35:50.855629 <... write resumed> ) = 1 <0.010785> [pid 10140] 13:35:50.856737 futex(0x666de8, FUTEX_WAIT_PRIVATE, 2, NULL [pid 10250] 13:35:50.896036 futex(0x666de8, FUTEX_WAKE_PRIVATE, 1 [pid 10140] 13:35:50.899996 <... futex resumed> ) = 0 <0.043155> [pid 10140] 13:35:50.902434 futex(0x666de8, FUTEX_WAKE_PRIVATE, 1) = 0 <0.000903> [pid 10250] 13:35:50.915637 <... futex resumed> ) = 1 <0.019519> [pid 10250] 13:35:50.916900 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 <0.000478>