[lttng-dev] UST Hanging at Tracepoint

Burton, Michael mburton at ciena.com
Tue Jun 12 11:44:53 EDT 2012 

I put a fprintf at the beginning of main() and it never prints.

-----Original Message-----
From: Mathieu Desnoyers [mailto:mathieu.desnoyers at efficios.com]
Sent: Tuesday, June 12, 2012 10:14 AM
To: Burton, Michael; dgoulet at efficios.com
Cc: lttng-dev at lists.lttng.org
Subject: Re: [lttng-dev] UST Hanging at Tracepoint

* Mathieu Desnoyers (mathieu.desnoyers at efficios.com) wrote:
> Hi Michael,
>
> Please note that you should be able to run UST with either (or both) of:
>
> - root lttng-sessiond, for system-wide tracing
> - per-user lttng-sessiond, for per-user tracing.
>
> It is entirely normal that one of the two UST threads within the
> application can't find an active sessiond if, for instance, you have
> just a root (and no per-user) sessiond running.
>
> So although I'm glad that you got things working, I fail to understand
> your explanation: it should have worked fine with the root sessiond,
> even if no ~/.lttng exists.
>
> David, can you look into this ?

hrm, further insight: is your program _really_ hang ? Try to make sure
you put a fprintf(stderr, ".....") at the beginning of your main().
Looking once more at your detailed UST output indicates that the
per-user UST thread tells you that it cannot see any running sessiond.
So yes, this thread blocks, but the thread talking to the root sessiond
can very well be working fine, and your application might also be
running fine. This should be double-checked.

Thanks,

Mathieu

>
> Thanks,
>
> Mathieu
>
> * Burton, Michael (mburton at ciena.com) wrote:
> > Mathieu,
> >
> > I figured out the problem.  When we start sessiond on our system as root, the /.lttng/ folder is not created, along with its contents.  UST timed out since there was no sock_path.  I was able to get UST working once I got sessiond running.
> >
> > Thanks.
> > Michael
> >
> > ________________________________________
> > From: Mathieu Desnoyers [mathieu.desnoyers at efficios.com]
> > Sent: 08 June 2012 21:38
> > To: Burton, Michael
> > Cc: lttng-dev at lists.lttng.org
> > Subject: Re: [lttng-dev] UST Hanging at Tracepoint
> >
> > * Burton, Michael (mburton at ciena.com) wrote:
> > > 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.
> >
> > Haven't had time to look at it yet, but could you also provide the
> > output of:
> >
> > LTTNG_UST_DEBUG=1 youprogname
> >
> > (starting your UST instrumented program with LTTNG_UST_DEBUG=1 env. var.
> > set)
> >
> > Thanks!
> >
> > Mathieu
> >
> > >
> > > Michael
> > >
> > > From: Burton, Michael [mailto:mburton at ciena.com]
> > > Sent: Thursday, June 07, 2012 2:16 PM
> > > To: lttng-dev at lists.lttng.org
> > > 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
> >
> > Content-Description: strace_debug.txt
> > > 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
> > > lttng-dev at lists.lttng.org
> > > http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
> >
> >
> > --
> > Mathieu Desnoyers
> > Operating System Efficiency R&D Consultant
> > EfficiOS Inc.
> > http://www.efficios.com
>
> --
> Mathieu Desnoyers
> Operating System Efficiency R&D Consultant
> EfficiOS Inc.
> http://www.efficios.com
>
> _______________________________________________
> lttng-dev mailing list
> lttng-dev at lists.lttng.org
> http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev

--
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com

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