For further insight, I've attached the strace from the hanging program. I also
upgraded LTTng-UST to 2.0.3 and userspace-rcu to 0.7.3.
Michael
From: Burton, Michael [mailto:[email protected]]
Sent: Thursday, June 07, 2012 2:16 PM
To: [email protected]
Subject: [lttng-dev] UST Hanging at Tracepoint
I am working on getting LTTng 2.0 working in our 2.6.35 kernel. I have kernel
tracing working but I'm having problems with UST.
I have a program with a dynamic UST tracepoint. When I run the program with
all UST events enabled (lttng enable-event -a -u) the program hangs on the
tracepoint. The last line from the UST debug is:
libust[6184/6185]: Info: sessiond not accepting connections to local apps
socket (in ust_listener_thread() at lttng-ust-comm.c:699)
Any insight into why this is happening? I've attached the UST and
lttng-sessiond debug generated by the program.
I am running the following:
lttng-modules-2.6.32 (found through this mailing list)
lttng-tools-2.0.1
lttng-ust-2.0.2
userspace-rcu-0.7.0
Thanks,
Michael
execve("/ciena/bin/idp", ["idp", "help"], [/* 11 vars */]) = 0
brk(0) = 0x804e000
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0xb783c000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=17420, ...}) = 0
mmap2(NULL, 17420, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7837000
close(3) = 0
open("/usr/lib/liblttng-ust.so.0", O_RDONLY) = 3
read(3,
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\220A\0\0004\0\0\0$"..., 512) =
512
fstat64(3, {st_mode=S_IFREG|0755, st_size=209876, ...}) = 0
mmap2(NULL, 212940, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb7803000
mmap2(0xb7832000, 20480, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2e) = 0xb7832000
close(3) = 0
open("/usr/lib/liblttng-ust-ctl.so.0", O_RDONLY) = 3
read(3,
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\200-\0\0004\0\0\0\274"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=140020, ...}) = 0
mmap2(NULL, 142828, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb77e0000
mmap2(0xb7802000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x21) = 0xb7802000
close(3) = 0
open("/usr/lib/liblttng-ust-fork.so.0", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\0\5\0\0004\0\0\0X"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=3864, ...}) = 0
mmap2(NULL, 6820, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb77de000
mmap2(0xb77df000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0) = 0xb77df000
close(3) = 0
open("/usr/lib/liblttng-ust-tracepoint.so.0", O_RDONLY) = 3
read(3,
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\220\v\0\0004\0\0\0008"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=16632, ...}) = 0
mmap2(NULL, 19944, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb77d9000
mmap2(0xb77dd000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3) = 0xb77dd000
close(3) = 0
open("/usr/lib/liblttng-ust-libc-wrapper.so.0", O_RDONLY) = 3
read(3,
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\360\t\0\0004\0\0\0\364"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=9300, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0xb77d8000
mmap2(NULL, 12104, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb77d5000
mmap2(0xb77d7000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1) = 0xb77d7000
close(3) = 0
open("/usr/lib/liburcu.so.1", O_RDONLY) = 3
read(3,
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0`\22\0\0004\0\0\0\374"..., 512)
= 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=18188, ...}) = 0
mmap2(NULL, 17080, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb77d0000
mmap2(0xb77d4000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x4) = 0xb77d4000
close(3) = 0
open("/usr/lib/liburcu-common.so.1", O_RDONLY) = 3
read(3,
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\340\5\0\0004\0\0\0\34"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=5084, ...}) = 0
mmap2(NULL, 8032, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb77ce000
mmap2(0xb77cf000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0) = 0xb77cf000
close(3) = 0
open("/usr/lib/liburcu-qsbr.so.1", O_RDONLY) = 3
read(3,
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\360\22\0\0004\0\0\0\374"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=18188, ...}) = 0
mmap2(NULL, 17080, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb77c9000
mmap2(0xb77cd000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x4) = 0xb77cd000
close(3) = 0
open("/usr/lib/liburcu-mb.so.1", O_RDONLY) = 3
read(3,
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0`\22\0\0004\0\0\0\374"..., 512)
= 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=18188, ...}) = 0
mmap2(NULL, 17080, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb77c4000
mmap2(0xb77c8000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x4) = 0xb77c8000
close(3) = 0
open("/usr/lib/liburcu-signal.so.1", O_RDONLY) = 3
read(3,
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0`\23\0\0004\0\0\0\10"..., 512)
= 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=18712, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0xb77c3000
mmap2(NULL, 21704, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb77bd000
mmap2(0xb77c2000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x4) = 0xb77c2000
close(3) = 0
open("/usr/lib/liburcu-cds.so.1", O_RDONLY) = 3
read(3,
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\300\f\0\0004\0\0\0t"..., 512)
= 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=26204, ...}) = 0
mmap2(NULL, 25004, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb77b6000
mmap2(0xb77bc000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6) = 0xb77bc000
close(3) = 0
open("/usr/lib/liburcu-bp.so.1", O_RDONLY) = 3
read(3,
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\320\24\0\0004\0\0\0\360"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=19968, ...}) = 0
mmap2(NULL, 23128, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb77b0000
mmap2(0xb77b5000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x4) = 0xb77b5000
close(3) = 0
open("/lib/libdl.so.2", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0 \n\0\0004\0\0\0<"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=9668, ...}) = 0
mmap2(NULL, 12408, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb77ac000
mmap2(0xb77ae000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1) = 0xb77ae000
close(3) = 0
open("/lib/libuuid.so.1", O_RDONLY) = 3
read(3,
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0@\r\0\0004\0\0\0\350"..., 512)
= 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=12872, ...}) = 0
mmap2(NULL, 15632, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb77a8000
mmap2(0xb77ab000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2) = 0xb77ab000
close(3) = 0
open("/lib/libc.so.6", O_RDONLY) = 3
read(3,
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\220n\1\0004\0\0\0L"..., 512) =
512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1347780, ...}) = 0
mmap2(NULL, 1358120, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb765c000
mprotect(0xb77a1000, 4096, PROT_NONE) = 0
mmap2(0xb77a2000, 12288, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x145) = 0xb77a2000
mmap2(0xb77a5000, 10536, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb77a5000
close(3) = 0
open("/lib/librt.so.1", O_RDONLY) = 3
read(3,
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0p\30\0\0004\0\0\0\230"..., 512)
= 512
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0xb765b000
fstat64(3, {st_mode=S_IFREG|0755, st_size=30616, ...}) = 0
mmap2(NULL, 33364, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb7652000
mmap2(0xb7659000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6) = 0xb7659000
close(3) = 0
open("/lib/libpthread.so.0", O_RDONLY) = 3
read(3,
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\360J\0\0004\0\0\0\354"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=88420, ...}) = 0
mmap2(NULL, 98828, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb7639000
mmap2(0xb764e000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x14) = 0xb764e000
mmap2(0xb7650000, 4620, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb7650000
close(3) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0xb7638000
mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0xb7636000
set_thread_area({entry_number:-1 -> 6, base_addr:0xb7636d80, limit:1048575,
seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0,
useable:1}) = 0
mprotect(0xb764e000, 4096, PROT_READ) = 0
mprotect(0xb7659000, 4096, PROT_READ) = 0
mprotect(0xb77a2000, 8192, PROT_READ) = 0
mprotect(0xb77ae000, 4096, PROT_READ) = 0
mprotect(0xb785a000, 4096, PROT_READ) = 0
munmap(0xb7837000, 17420) = 0
set_tid_address(0xb7636de8) = 3050
set_robust_list(0xb7636df0, 0xc) = 0
futex(0xbfaaf560, FUTEX_WAKE_PRIVATE, 1) = 0
futex(0xbfaaf560, 0x189 /* FUTEX_??? */, 1, NULL, bfaaf570) = -1 EAGAIN
(Resource temporarily unavailable)
rt_sigaction(SIGRTMIN, {0xb763d4f0, [], SA_SIGINFO}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {0xb763d9c0, [], SA_RESTART|SA_SIGINFO}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM_INFINITY}) = 0
uname({sys="Linux", node="5410", ...}) = 0
rt_sigaction(SIGUSR1, {0xb77bec0a, [], SA_RESTART|SA_SIGINFO}, NULL, 8) = 0
futex(0xb77af06c, FUTEX_WAKE_PRIVATE, 2147483647) = 0
brk(0) = 0x804e000
brk(0x806f000) = 0x806f000
gettimeofday({1339187216, 880428}, NULL) = 0
open("/dev/urandom", O_RDONLY|O_LARGEFILE) = 3
fcntl64(3, F_GETFD) = 0
fcntl64(3, F_SETFD, FD_CLOEXEC) = 0
getuid32() = 0
gettimeofday({1339187216, 889603}, NULL) = 0
gettimeofday({1339187216, 894471}, NULL) = 0
read(3, "\275\0051F\215\373\371\202\377kfb/\362\303N"..., 16) = 16
clock_gettime(CLOCK_REALTIME, {1339187216, 902329405}) = 0
getuid32() = 0
geteuid32() = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], [], 8) = 0
mmap2(NULL, 8388608, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK,
-1, 0) = 0xb6e36000
mprotect(0xb6e36000, 4096, PROT_NONE) = 0
clone(child_stack=0xb7634d64,
flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID|CLONE_DETACHED,
parent_tidptr=0xb7635bd8, {entry_number:6, base_addr:0xb7635b70,
limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1,
seg_not_present:0, useable:1}, child_tidptr=0xb7635bd8) = 3051
mmap2(NULL, 8388608, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK,
-1, 0) = 0xb6636000
mprotect(0xb6636000, 4096, PROT_NONE) = 0
clone(child_stack=0xb6e34d64,
flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID|CLONE_DETACHED,
parent_tidptr=0xb6e35bd8, {entry_number:6, base_addr:0xb6e35b70,
limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1,
seg_not_present:0, useable:1}, child_tidptr=0xb6e35bd8) = 3052
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
gettimeofday({1339187216, 974869}, NULL) = 0
futex(0xb7836e30, FUTEX_WAIT_PRIVATE, 0, {2, 927460405}) = -1 ETIMEDOUT
(Connection timed out)
gettid() = 3050
write(2, "libust[3050/3050]: Error: Timed o"..., 107libust[3050/3050]: Error:
Timed out waiting for ltt-sessiond (in lttng_ust_init() at lttng-ust-comm.c:912)
) = 107
futex(0xb7836e80, FUTEX_WAIT_PRIVATE, 2, NULL_______________________________________________
lttng-dev mailing list
[email protected]
http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
