100% cpu usage in lightdm or tty login

[Emmanuel]

After X login lightdm process uses 100% cpu. If login tty login process uses 100% cpu.
This bug only occurs if libpam-pkcs11 is instaled and using safenet (5100 or 5101) card.

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uname -a
Linux serpro-1555140 4.4.0-31-generic #50-Ubuntu SMP Wed Jul 13 00:07:12 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

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ii lightdm 1.18.2-0ubuntu1 amd64
ii safenetauthenticationclient 9.1.7-0 amd64
ii libpam-pkcs11 0.6.8 amd64

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sudo tail -1000 /var/log/lightdm/lightdm.log
[+80247.53s] DEBUG: Seat seat0 changes active session to c4
[+80250.24s] DEBUG: Seat seat0 changes active session to
[+80250.25s] DEBUG: Seat seat0 changes active session to c4
[+80250.38s] DEBUG: Seat seat0 changes active session to
[+80253.68s] DEBUG: Seat seat0 changes active session to c2
[+80253.68s] DEBUG: Session c2 is already active

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ps ax|grep lightdm
 2836 ? SLsl 0:00 /usr/sbin/lightdm
 2846 tty7 Ss+ 51:47 /usr/lib/xorg/Xorg -core :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
 3149 ? SLl 1364:40 lightdm --session-child 12 19
 4012 ? S 0:00 run-parts /etc/lightdm/session-startup.d/
 4041 ? S 0:00 python /etc/lightdm/session-startup.d//start-babassu

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sudo trace -f -p 2846
rt_sigprocmask(SIG_BLOCK, [IO], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, [ALRM CHLD TSTP TTIN TTOU VTALRM WINCH], [IO], 8) = 0
rt_sigprocmask(SIG_SETMASK, [IO], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 16000}) = 1 (in [23], left {0, 8885})
ioctl(23, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x52, 0x10), 0x7ffd1b7695c0) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 8000}) = 1 (in [20], left {0, 7993})
setitimer(ITIMER_REAL, {it_interval={0, 5000}, it_value={0, 5000}}, NULL) = 0
recvmsg(20, {msg_name(0)=NULL, msg_iov(1)=[{"\206\20\2\0i\1\0\1\206\t\5\0k\1\0\1\4\0\0\0\0\0\0\0<\5\0\0\206\3\4\0"..., 4096}], msg_controllen=0, msg_flags=0}, 0) = 44
writev(20, [{"T\1T3k\1\0\1\0\0\0\0<\5\0\0\0\0\0\0<\5\0\0\336\25\345\4\0\0\0\0", 32}], 1) = 32
recvmsg(20, 0x7ffd1b769700, 0) = -1 EAGAIN (Resource temporarily unavailable)
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 8000}) = 1 (in [64], left {0, 2955})
setitimer(ITIMER_REAL, {it_interval={0, 5000}, it_value={0, 5000}}, NULL) = 0
recvmsg(64, {msg_name(0)=NULL, msg_iov(1)=[{"( \4\0\n\0\200\4b\2\0\0\274\5>\7", 4096}], msg_controllen=0, msg_flags=0}, 0) = 16
writev(64, [{"\1\1d\241\0\0\0\0\0\0\0\0q\tP\7\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 32}], 1) = 32
recvmsg(64, 0x7ffd1b769700, 0) = -1 EAGAIN (Resource temporarily unavailable)
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 3000}) = 1 (in [64], left {0, 2351})
setitimer(ITIMER_REAL, {it_interval={0, 5000}, it_value={0, 5000}}, NULL) = 0
recvmsg(64, {msg_name(0)=NULL, msg_iov(1)=[{"5 \4\0\376\30\200\4\n\0\200\4\17\6r\3\213\4\6\0\377\30\200\4\376\30\200\4\20\2\0\0"..., 4096}], msg_controllen=0, msg_flags=0}, 0) = 4096
recvmsg(64, {msg_name(0)=NULL, msg_iov(1)=[{"\3\24\32\3\24\33\3\24\34\3\25\23\3\25\24\3\25\26\3\26\26\3\26\27\3\26\30\3\26\31\3\26"..., 4004}], msg_controllen=0, msg_flags=0}, 0) = 3380
--- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} ---
rt_sigreturn({mask=[]}) = 3380
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 65 66], NULL, NULL, {0, 0}) = 0 (Timeout)
setitimer(ITIMER_REAL, {it_interval={0, 5000}, it_value={0, 5000}}, NULL) = 0
writev(20, [{"[\2T3>4\0\1@4\0\1\354\25\345\4\0\0\0\0\17\6r\3\0\0\0\0\17\6r\3", 32}], 1) = 32
writev(20, [{"[\2T3\n\0\200\4y\0\0\1\354\25\345\4\0\0\0\0\17\6r\3\265\3\22\0\17\6r\3", 32}], 1) = 32
writev(64, [{"\1\2\245\241\0\0\0\0\v\0\200\4\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 32}], 1) = 32
recvmsg(64, 0x7ffd1b769700, 0) = -1 EAGAIN (Resource temporarily unavailable)
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 0}) = 1 (in [20], left {0, 0})
rt_sigprocmask(SIG_BLOCK, [IO], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, [ALRM CHLD TSTP TTIN TTOU VTALRM WINCH], [IO], 8) = 0
rt_sigprocmask(SIG_SETMASK, [IO], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 16000}) = 1 (in [20], left {0, 15993})
setitimer(ITIMER_REAL, {it_interval={0, 5000}, it_value={0, 5000}}, NULL) = 0
recvmsg(20, {msg_name(0)=NULL, msg_iov(1)=[{"\206\17\2\0T\1\0\1\212\5\4\0\204\253\0\1\0\0\0\0\17\6r\3\217\3\4\0y\0\0\1"..., 4096}], msg_controllen=0, msg_flags=0}, 0) = 92
writev(20, [{"\1\2\\3\0\0\0\0\v\0\200\4\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 32}], 1) = 32
recvmsg(20, 0x7ffd1b769700, 0) = -1 EAGAIN (Resource temporarily unavailable)
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 15000}) = 1 (in [17], left {0, 14994})
ioctl(17, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x52, 0x10), 0x7ffd1b7695d0) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 15000}) = 1 (in [20], left {0, 14994})
setitimer(ITIMER_REAL, {it_interval={0, 5000}, it_value={0, 5000}}, NULL) = 0
recvmsg(20, {msg_name(0)=NULL, msg_iov(1)=[{"\233/\6\0\0\0\0\0\260;a)\34V\0\0\254\22\0\0\1\0\0\1", 4096}], msg_controllen=0, msg_flags=0}, 0) = 24
writev(20, [{"\1.]3\0\0\0\0\0\0\340\16\34V\0\0\0\0\0\1\0\0\0\0\0\226Y+\301\361P\204", 32}], 1) = 32
recvmsg(20, 0x7ffd1b769700, 0) = -1 EAGAIN (Resource temporarily unavailable)
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 15000}) = 1 (in [23], left {0, 977})
ioctl(23, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x52, 0x10), 0x7ffd1b7695c0) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 1000}) = 1 (in [20], left {0, 992})
setitimer(ITIMER_REAL, {it_interval={0, 5000}, it_value={0, 5000}}, NULL) = 0
recvmsg(20, {msg_name(0)=NULL, msg_iov(1)=[{"\206\20\2\0l\1\0\1\206\t\5\0n\1\0\1\4\0\0\0\0\0\0\0<\5\0\0\206\3\4\0"..., 4096}], msg_controllen=0, msg_flags=0}, 0) = 44
writev(20, [{"T\1`3n\1\0\1\0\0\0\0<\5\0\0\0\0\0\0<\5\0\0\377\25\345\4\0\0\0\0", 32}], 1) = 32
recvmsg(20, 0x7ffd1b769700, 0) = -1 EAGAIN (Resource temporarily unavailable)
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 1000}) = 0 (Timeout)
rt_sigprocmask(SIG_BLOCK, [IO], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, [ALRM CHLD TSTP TTIN TTOU VTALRM WINCH], [IO], 8) = 0
rt_sigprocmask(SIG_SETMASK, [IO], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 16000}) = 1 (in [64], left {0, 6926})
setitimer(ITIMER_REAL, {it_interval={0, 5000}, it_value={0, 5000}}, NULL) = 0
recvmsg(64, {msg_name(0)=NULL, msg_iov(1)=[{"( \4\0\n\0\200\4b\2\0\0\305\5\223\7", 4096}], msg_controllen=0, msg_flags=0}, 0) = 16
writev(64, [{"\1\1\246\241\0\0\0\0\0\0\0\0z\t\245\7\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 32}], 1) = 32
recvmsg(64, 0x7ffd1b769700, 0) = -1 EAGAIN (Resource temporarily unavailable)
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 6000}) = 1 (in [64], left {0, 5353})
setitimer(ITIMER_REAL, {it_interval={0, 5000}, it_value={0, 5000}}, NULL) = 0
recvmsg(64, {msg_name(0)=NULL, msg_iov(1)=[{"5 \4\0\0\31\200\4\n\0\200\4\17\6r\3\213\4\6\0\1\31\200\4\0\31\200\4\20\2\0\0"..., 4096}], msg_controllen=0, msg_flags=0}, 0) = 4096
recvmsg(64, {msg_name(0)=NULL, msg_iov(1)=[{"\31\23\3\31\24\3\31\27\3\31\30\3\31\31@\17\00318//\17\00318//\17\3^\23\17"..., 4000}], msg_controllen=0, msg_flags=0}, 0) = 3220
--- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} ---
rt_sigreturn({mask=[]}) = 139694441070592
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 65 66], NULL, NULL, {0, 0}) = 0 (Timeout)
setitimer(ITIMER_REAL, {it_interval={0, 5000}, it_value={0, 5000}}, NULL) = 0
writev(20, [{"[\2`3>4\0\1@4\0\1\24\26\345\4\0\0\0\0\17\6r\3\0\0\0\0\17\6r\3", 32}], 1) = 32
writev(20, [{"[\2`3\n\0\200\4y\0\0\1\24\26\345\4\0\0\0\0\17\6r\3\265\3\22\0\17\6r\3", 32}], 1) = 32
writev(64, [{"\1\2\344\241\0\0\0\0\v\0\200\4\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 32}], 1) = 32
recvmsg(64, 0x7ffd1b769700, 0) = -1 EAGAIN (Resource temporarily unavailable)
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 0}) = 1 (in [20], left {0, 0})
rt_sigprocmask(SIG_BLOCK, [IO], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, [ALRM CHLD TSTP TTIN TTOU VTALRM WINCH], [IO], 8) = 0
rt_sigprocmask(SIG_SETMASK, [IO], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 16000}) = 1 (in [20], left {0, 15993})
setitimer(ITIMER_REAL, {it_interval={0, 5000}, it_value={0, 5000}}, NULL) = 0
recvmsg(20, {msg_name(0)=NULL, msg_iov(1)=[{"\206\17\2\0W\1\0\1\212\5\4\0\206\253\0\1\0\0\0\0\17\6r\3\217\3\4\0y\0\0\1"..., 4096}], msg_controllen=0, msg_flags=0}, 0) = 92
writev(20, [{"\1\2h3\0\0\0\0\v\0\200\4\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 32}], 1) = 32
recvmsg(20, 0x7ffd1b769700, 0) = -1 EAGAIN (Resource temporarily unavailable)
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 16000}) = 1 (in [17], left {0, 15995})
ioctl(17, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x52, 0x10), 0x7ffd1b7695d0) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 15000}) = 1 (in [20], left {0, 14993})
setitimer(ITIMER_REAL, {it_interval={0, 5000}, it_value={0, 5000}}, NULL) = 0
recvmsg(20, {msg_name(0)=NULL, msg_iov(1)=[{"\233/\6\0\0\0\0\0\260;a)\34V\0\0\254\22\0\0\1\0\0\1", 4096}], msg_controllen=0, msg_flags=0}, 0) = 24
writev(20, [{"\1.i3\0\0\0\0\0\0\340\16\34V\0\0\0\0\0\1\0\0\0\0\0\226Y+\301\361P\204", 32}], 1) = 32
recvmsg(20, 0x7ffd1b769700, 0) = -1 EAGAIN (Resource temporarily unavailable)
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 15000}) = 0 (Timeout)
rt_sigprocmask(SIG_BLOCK, [IO], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, [ALRM CHLD TSTP TTIN TTOU VTALRM WINCH], [IO], 8) = 0
rt_sigprocmask(SIG_SETMASK, [IO], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 16000}) = 1 (in [23], left {0, 6022})
ioctl(23, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x52, 0x10), 0x7ffd1b7695c0) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 6000}) = 1 (in [20], left {0, 5993})
setitimer(ITIMER_REAL, {it_interval={0, 5000}, it_value={0, 5000}}, NULL) = 0
recvmsg(20, {msg_name(0)=NULL, msg_iov(1)=[{"\206\20\2\0o\1\0\1\206\t\5\0q\1\0\1\4\0\0\0\0\0\0\0<\5\0\0\206\3\4\0"..., 4096}], msg_controllen=0, msg_flags=0}, 0) = 44
writev(20, [{"T\1l3q\1\0\1\0\0\0\0<\5\0\0\0\0\0\0<\5\0\0001\26\345\4\0\0\0\0", 32}], 1) = 32
recvmsg(20, 0x7ffd1b769700, 0) = -1 EAGAIN (Resource temporarily unavailable)
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 5000}) = 1 (in [64], left {0, 2893})
setitimer(ITIMER_REAL, {it_interval={0, 5000}, it_value={0, 5000}}, NULL) = 0
recvmsg(64, {msg_name(0)=NULL, msg_iov(1)=[{"( \4\0\n\0\200\4b\2\0\0\274\5\223\7", 4096}], msg_controllen=0, msg_flags=0}, 0) = 16
writev(64, [{"\1\1\345\241\0\0\0\0\0\0\0\0q\t\245\7\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 32}], 1) = 32
recvmsg(64, 0x7ffd1b769700, 0) = -1 EAGAIN (Resource temporarily unavailable)
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 3000}) = 1 (in [64], left {0, 2370})
setitimer(ITIMER_REAL, {it_interval={0, 5000}, it_value={0, 5000}}, NULL) = 0
recvmsg(64, {msg_name(0)=NULL, msg_iov(1)=[{"5 \4\0\2\31\200\4\n\0\200\4\17\6r\3\213\4\6\0\3\31\200\4\2\31\200\4\20\2\0\0"..., 4096}], msg_controllen=0, msg_flags=0}, 0) = 4096
recvmsg(64, {msg_name(0)=NULL, msg_iov(1)=[{"\3\30\34\3\31\23\3\31\24\3\31\27\3\31\30\3\31\31@\17\00318//\17\00318//\17"..., 3996}], msg_controllen=0, msg_flags=0}, 0) = 3252
--- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} ---
rt_sigreturn({mask=[]}) = 3252
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 65 66], NULL, NULL, {0, 0}) = 0 (Timeout)
setitimer(ITIMER_REAL, {it_interval={0, 5000}, it_value={0, 5000}}, NULL) = 0
writev(20, [{"[\2l3>4\0\1@4\0\1<\26\345\4\0\0\0\0\17\6r\3\0\0\0\0\17\6r\3", 32}], 1) = 32
writev(20, [{"[\2l3\n\0\200\4y\0\0\1<\26\345\4\0\0\0\0\17\6r\3\265\3\22\0\17\6r\3", 32}], 1) = 32
writev(64, [{"\1\2%\242\0\0\0\0\v\0\200\4\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 32}], 1) = 32
recvmsg(64, 0x7ffd1b769700, 0) = -1 EAGAIN (Resource temporarily unavailable)
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 0}) = 1 (in [20], left {0, 0})
rt_sigprocmask(SIG_BLOCK, [IO], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, [ALRM CHLD TSTP TTIN TTOU VTALRM WINCH], [IO], 8) = 0
rt_sigprocmask(SIG_SETMASK, [IO], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 15000}) = 1 (in [20], left {0, 14992})
setitimer(ITIMER_REAL, {it_interval={0, 5000}, it_value={0, 5000}}, NULL) = 0
recvmsg(20, {msg_name(0)=NULL, msg_iov(1)=[{"\206\17\2\0Z\1\0\1\212\5\4\0\210\253\0\1\0\0\0\0\17\6r\3\217\3\4\0y\0\0\1"..., 4096}], msg_controllen=0, msg_flags=0}, 0) = 92
writev(20, [{"\1\2t3\0\0\0\0\v\0\200\4\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 32}], 1) = 32
recvmsg(20, {msg_name(0)=NULL, msg_iov(1)=[{"\233/\6\0\0\0\0\0\260;a)\34V\0\0\254\22\0\0\1\0\0\1", 4096}], msg_controllen=0, msg_flags=0}, 0) = 24
writev(20, [{"\1.u3\0\0\0\0\0\0\340\16\34V\0\0\0\0\0\1\0\0\0\0\0\226Y+\301\361P\204", 32}], 1) = 32
recvmsg(20, 0x7ffd1b769700, 0) = -1 EAGAIN (Resource temporarily unavailable)
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 15000}) = 1 (in [17], left {0, 14995})
ioctl(17, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x52, 0x10), 0x7ffd1b7695d0) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 15000}) = 0 (Timeout)
rt_sigprocmask(SIG_BLOCK, [IO], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, [ALRM CHLD TSTP TTIN TTOU VTALRM WINCH], [IO], 8) = 0
rt_sigprocmask(SIG_SETMASK, [IO], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 16000}) = 1 (in [20], left {0, 14121})
setitimer(ITIMER_REAL, {it_interval={0, 5000}, it_value={0, 5000}}, NULL) = 0
recvmsg(20, {msg_name(0)=NULL, msg_iov(1)=[{"\206\20\2\0r\1\0\1\206\t\5\0t\1\0\1\4\0\0\0\0\0\0\0<\5\0\0\206\3\4\0"..., 4096}], msg_controllen=0, msg_flags=0}, 0) = 44
writev(20, [{"T\1x3t\1\0\1\0\0\0\0<\5\0\0\0\0\0\0<\5\0\0S\26\345\4\0\0\0\0", 32}], 1) = 32
recvmsg(20, 0x7ffd1b769700, 0) = -1 EAGAIN (Resource temporarily unavailable)
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 14000}) = 1 (in [23], left {0, 13992})
ioctl(23, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x52, 0x10), 0x7ffd1b7695c0) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 14000}) = 1 (in [64], left {0, 4928})
setitimer(ITIMER_REAL, {it_interval={0, 5000}, it_value={0, 5000}}, NULL) = 0
recvmsg(64, {msg_name(0)=NULL, msg_iov(1)=[{"( \4\0\n\0\200\4b\2\0\0\305\5>\7", 4096}], msg_controllen=0, msg_flags=0}, 0) = 16
writev(64, [{"\1\1&\242\0\0\0\0\0\0\0\0z\tP\7\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 32}], 1) = 32
recvmsg(64, 0x7ffd1b769700, 0) = -1 EAGAIN (Resource temporarily unavailable)
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 5000}) = ? ERESTARTNOHAND (To be restarted if no handler)
--- SIGIO {si_signo=SIGIO, si_code=SI_KERNEL} ---
select(40, [28 29 30 31 32 39], NULL, NULL, {0, 0}) = 1 (in [30], left {0, 0})
read(30, ")\237\265W\0\0\0\0\316?\3\0\0\0\0\0\4\0\4\0\6\0\7\0)\237\265W\0\0\0\0"..., 7152) = 72
read(30, 0x561c21150950, 7104) = -1 EAGAIN (Resource temporarily unavailable)
read(30, 0x561c21150938, 7128) = -1 EAGAIN (Resource temporarily unavailable)
read(30, 0x561c21150920, 7152) = -1 EAGAIN (Resource temporarily unavailable)
rt_sigreturn({mask=[]}) = -1 EINTR (Interrupted system call)
rt_sigprocmask(SIG_BLOCK, [IO], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, [ALRM CHLD TSTP TTIN TTOU VTALRM WINCH], [IO], 8) = 0
rt_sigprocmask(SIG_SETMASK, [IO], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [IO], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, [ALRM CHLD TSTP TTIN TTOU VTALRM WINCH], [IO], 8) = 0
rt_sigprocmask(SIG_SETMASK, [IO], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [IO], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, [ALRM CHLD TSTP TTIN TTOU VTALRM WINCH], [IO], 8) = 0
rt_sigprocmask(SIG_SETMASK, [IO], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [IO], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, [ALRM CHLD TSTP TTIN TTOU VTALRM WINCH], [IO], 8) = 0
rt_sigprocmask(SIG_SETMASK, [IO], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
writev(64, [{"#\203&\242\26\0\0\0\2\0\3\0]\26\345\0046\0\0\0b\2\0\0\v\0\200\4\0\0\0\0"..., 120}], 1) = 120
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 0}) = 1 (in [64], left {0, 0})
setitimer(ITIMER_REAL, {it_interval={0, 5000}, it_value={0, 5000}}, NULL) = 0
recvmsg(64, {msg_name(0)=NULL, msg_iov(1)=[{"5 \4\0\4\31\200\4\n\0\200\4\17\6r\3\213\4\6\0\5\31\200\4\4\31\200\4\20\2\0\0"..., 4096}], msg_controllen=0, msg_flags=0}, 0) = 4096
--- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} ---
rt_sigreturn({mask=[]}) = 139694441070592
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 0}) = 1 (in [64], left {0, 0})
rt_sigprocmask(SIG_BLOCK, [IO], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, [ALRM CHLD TSTP TTIN TTOU VTALRM WINCH], [IO], 8) = 0
rt_sigprocmask(SIG_SETMASK, [IO], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
select(512, [1 3 4 5 6 15 16 17 18 19 20 21 23 33 34 35 36 37 38 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 64 65 66], NULL, NULL, {0, 16000}) = 1 (in [64], left {0, 15991})
setitimer(ITIMER_REAL, {it_interval={0, 5000}, it_value={0, 5000}}, NULL) = 0
recvmsg(64, {msg_name(0)=NULL, msg_iov(1)=[{"`\17\3\23\f\3 \3\25\27\31\27\36\0\0\0\336\372\21\0ZULWHY\v\25\23\17\3>"..., 4000}], msg_controllen=0, msg_flags=0}, 0) = 3244
writev(20, [{"[\2x3>4\0\1@4\0\1h\26\345\4\0\0\0\0\17\6r\3\0\0\0\0\17\6r\3", 32}], 1) = 32
writev(20, [{"[\2x3\n\0\200\4y\0\0\1h\26\345\4\0\0\0\0\17\6r\3\265\3\22\0\17\6r\3", 32}], 1) = 32
writev(64, [{"\1\2f\242\0\0\0\0\v\0\200\4\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 32}], 1) = 32
recvmsg(64, 0x7ffd1b769700, 0) = -1 EAGAIN (Resource temporarily unavailable)
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
^Cstrace: Process 2846 detached

#####################################

sudo trace -f -p 3146
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199998})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199998})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}) = 1 (in [8], left {0, 199999})
[pid 3936] select(9, [5 6 8], NULL, NULL, {0, 200000}^Cstrace: Process 3149 detached
strace: Process 3936 detached
strace: Process 3938 detached
strace: Process 3984 detached
strace: Process 3985 detached