web2
2014-Oct-01 16:27 UTC
Re: [libvirt-users] [libvirt] increase number of libvirt threads by starting tansient guest doamin - is it a bug?
Hi ----------------ursprüngliche Nachricht----------------- Von: "Michal Privoznik" mprivozn@redhat.com An: "web2" ustermann78@web.de , "libvirt-users redhat.com" , "libvirt-list redhat.com" Datum: Wed, 01 Oct 2014 18:12:45 +0200 -------------------------------------------------> On 01.10.2014 10:31, web2 wrote: >> Hello, >> >> sorry for my later answer. >> >> so, after i started libvirtd (no vm´s running) and attach gdb i get the >> following threads >> >> (gdb) info thread >> Id Target Id Frame >> 11 Thread 0x7f18fef4e700 (LWP 20695) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 10 Thread 0x7f18fe74d700 (LWP 20696) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 9 Thread 0x7f18fdf4c700 (LWP 20697) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 8 Thread 0x7f18fd74b700 (LWP 20698) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 7 Thread 0x7f18fcf4a700 (LWP 20699) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 6 Thread 0x7f18fc749700 (LWP 20700) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 5 Thread 0x7f18fbf48700 (LWP 20701) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 4 Thread 0x7f18fb747700 (LWP 20702) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 3 Thread 0x7f18faf46700 (LWP 20703) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 2 Thread 0x7f18fa745700 (LWP 20704) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> * 1 Thread 0x7f190892f840 (LWP 20694) "libvirtd" 0x00007f190677d7cd in >> poll () at ../sysdeps/unix/syscall-template.S:81 >> >> if i restore an persistent domain, i see the following in gdb: >> >> Detaching after fork from child process 20880. >> Detaching after fork from child process 20882. >> [New Thread 0x7f190893d700 (LWP 20883)] >> Detaching after fork from child process 20890. >> Detaching after fork from child process 20906. >> >> (gdb) info thread >> Id Target Id Frame >> 12 Thread 0x7f190893d700 (LWP 20883) "libvirtd" 0x00007f1906e6684d in >> read () at ../sysdeps/unix/syscall-template.S:81 >> 11 Thread 0x7f18fef4e700 (LWP 20695) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 10 Thread 0x7f18fe74d700 (LWP 20696) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 9 Thread 0x7f18fdf4c700 (LWP 20697) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 8 Thread 0x7f18fd74b700 (LWP 20698) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 7 Thread 0x7f18fcf4a700 (LWP 20699) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 6 Thread 0x7f18fc749700 (LWP 20700) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 5 Thread 0x7f18fbf48700 (LWP 20701) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 4 Thread 0x7f18fb747700 (LWP 20702) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 3 Thread 0x7f18faf46700 (LWP 20703) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 2 Thread 0x7f18fa745700 (LWP 20704) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> * 1 Thread 0x7f190892f840 (LWP 20694) "libvirtd" 0x00007f190677d7cd in >> poll () at ../sysdeps/unix/syscall-template.S:81 >> >> if i now destroy this vm i get the following: >> >> >> (gdb) info thread >> Id Target Id Frame >> 12 Thread 0x7f190893d700 (LWP 20883) "libvirtd" 0x00007f1906e6684d in >> read () at ../sysdeps/unix/syscall-template.S:81 >> 11 Thread 0x7f18fef4e700 (LWP 20695) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 10 Thread 0x7f18fe74d700 (LWP 20696) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 9 Thread 0x7f18fdf4c700 (LWP 20697) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 8 Thread 0x7f18fd74b700 (LWP 20698) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 7 Thread 0x7f18fcf4a700 (LWP 20699) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 6 Thread 0x7f18fc749700 (LWP 20700) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 5 Thread 0x7f18fbf48700 (LWP 20701) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 4 Thread 0x7f18fb747700 (LWP 20702) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 3 Thread 0x7f18faf46700 (LWP 20703) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> 2 Thread 0x7f18fa745700 (LWP 20704) "libvirtd" >> pthread_cond_wait@@GLIBC_2.3.2 () at >> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >> * 1 Thread 0x7f190892f840 (LWP 20694) "libvirtd" 0x00007f190677d7cd in >> poll () at ../sysdeps/unix/syscall-template.S:81 >> >> attaching thread Id 12 and bt: >> (gdb) thread 12 >> [Switching to thread 12 (Thread 0x7f190893d700 (LWP 20883))] >> #0 0x00007f1906e6684d in read () at >> ../sysdeps/unix/syscall-template.S:81 >> 81 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) >> (gdb) bt >> #0 0x00007f1906e6684d in read () at >> ../sysdeps/unix/syscall-template.S:81 >> #1 0x00007f18f8c415be in read (__nbytes=16, __buf=0x7f18d4000c50, >> __fd=26) at /usr/include/bits/unistd.h:44 >> #2 read_all (fd=26, data=data@entry =0x7f18d4000c50, len=len@entry =16, >> nonblocking=nonblocking@entry =0) at xs.c:374 >> #3 0x00007f18f8c41675 in read_message (h=h@entry =0x7f18e8001070, >> nonblocking=nonblocking@entry =0) at xs.c:1139 >> #4 0x00007f18f8c41e90 in read_thread (arg=0x7f18e8001070) at xs.c:1211 >> #5 0x00007f1906e5ff35 in start_thread (arg=0x7f190893d700) at >> pthread_create.c:309 >> #6 0x00007f1906787c3d in clone () at >> ../sysdeps/unix/sysv/linux/x86_64/clone.S:111 >> >> and then bt full: >> >> (gdb) bt full >> #0 0x00007f1906e6684d in read () at >> ../sysdeps/unix/syscall-template.S:81 >> No locals. >> #1 0x00007f18f8c415be in read (__nbytes=16, __buf=0x7f18d4000c50, >> __fd=26) at /usr/include/bits/unistd.h:44 >> No locals. >> #2 read_all (fd=26, data=data@entry =0x7f18d4000c50, len=len@entry =16, >> nonblocking=nonblocking@entry =0) at xs.c:374 >> done = <optimized out> >> #3 0x00007f18f8c41675 in read_message (h=h@entry =0x7f18e8001070, >> nonblocking=nonblocking@entry =0) at xs.c:1139 >> __clframe = {__cancel_routine = <optimized out>, __cancel_arg = >> 0x7f18d4000c40, __do_it = 1, __cancel_type = <optimized out>} >> msg = 0x7f18d4000c40 >> body = 0x0 >> saved_errno = 0 >> ret = -1 >> #4 0x00007f18f8c41e90 in read_thread (arg=0x7f18e8001070) at xs.c:1211 >> h = 0x7f18e8001070 >> fd = <optimized out> > > This stack doesn't come from libvirt. I suspect it comes from a library > that libvirtd is linked with. Maybe libxl? What's the connection uri > you're using?i use xen:///. as i said early, i do tests with xen xm´s. xend is disabled, so i use the libxl. all the best max> >> #5 0x00007f1906e5ff35 in start_thread (arg=0x7f190893d700) at >> pthread_create.c:309 >> __res = <optimized out> >> pd = 0x7f190893d700 >> now = <optimized out> >> unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139745494816512, >> 9092725460686644452, 1, 0, 139745494817216, 139745494816512, >> -9214988784542636828, -9214975709026802460}, mask_was_saved = 0}}, priv >> = {pad = {0x0, 0x0, 0x0, 0x0}, >> data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}} >> not_first_call = <optimized out> >> pagesize_m1 = <optimized out> >> sp = <optimized out> >> freesize = <optimized out> >> #6 0x00007f1906787c3d in clone () at >> ../sysdeps/unix/sysv/linux/x86_64/clone.S:111 >> No locals. > > > Michal >--
Jim Fehlig
2014-Oct-02 03:38 UTC
Re: [libvirt-users] [libvirt] increase number of libvirt threads by starting tansient guest doamin - is it a bug?
web2 wrote:> Hi > > ----------------ursprüngliche Nachricht----------------- > Von: "Michal Privoznik" mprivozn@redhat.com > An: "web2" ustermann78@web.de , "libvirt-users redhat.com" > , "libvirt-list redhat.com" > Datum: Wed, 01 Oct 2014 18:12:45 +0200 > ------------------------------------------------- > > > >> On 01.10.2014 10:31, web2 wrote: >> >>> Hello, >>> >>> sorry for my later answer. >>> >>> so, after i started libvirtd (no vm´s running) and attach gdb i get the >>> following threads >>> >>> (gdb) info thread >>> Id Target Id Frame >>> 11 Thread 0x7f18fef4e700 (LWP 20695) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 10 Thread 0x7f18fe74d700 (LWP 20696) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 9 Thread 0x7f18fdf4c700 (LWP 20697) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 8 Thread 0x7f18fd74b700 (LWP 20698) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 7 Thread 0x7f18fcf4a700 (LWP 20699) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 6 Thread 0x7f18fc749700 (LWP 20700) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 5 Thread 0x7f18fbf48700 (LWP 20701) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 4 Thread 0x7f18fb747700 (LWP 20702) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 3 Thread 0x7f18faf46700 (LWP 20703) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 2 Thread 0x7f18fa745700 (LWP 20704) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> * 1 Thread 0x7f190892f840 (LWP 20694) "libvirtd" 0x00007f190677d7cd in >>> poll () at ../sysdeps/unix/syscall-template.S:81 >>> >>> if i restore an persistent domain, i see the following in gdb: >>> >>> Detaching after fork from child process 20880. >>> Detaching after fork from child process 20882. >>> [New Thread 0x7f190893d700 (LWP 20883)] >>> Detaching after fork from child process 20890. >>> Detaching after fork from child process 20906. >>> >>> (gdb) info thread >>> Id Target Id Frame >>> 12 Thread 0x7f190893d700 (LWP 20883) "libvirtd" 0x00007f1906e6684d in >>> read () at ../sysdeps/unix/syscall-template.S:81 >>> 11 Thread 0x7f18fef4e700 (LWP 20695) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 10 Thread 0x7f18fe74d700 (LWP 20696) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 9 Thread 0x7f18fdf4c700 (LWP 20697) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 8 Thread 0x7f18fd74b700 (LWP 20698) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 7 Thread 0x7f18fcf4a700 (LWP 20699) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 6 Thread 0x7f18fc749700 (LWP 20700) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 5 Thread 0x7f18fbf48700 (LWP 20701) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 4 Thread 0x7f18fb747700 (LWP 20702) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 3 Thread 0x7f18faf46700 (LWP 20703) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 2 Thread 0x7f18fa745700 (LWP 20704) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> * 1 Thread 0x7f190892f840 (LWP 20694) "libvirtd" 0x00007f190677d7cd in >>> poll () at ../sysdeps/unix/syscall-template.S:81 >>> >>> if i now destroy this vm i get the following: >>> >>> >>> (gdb) info thread >>> Id Target Id Frame >>> 12 Thread 0x7f190893d700 (LWP 20883) "libvirtd" 0x00007f1906e6684d in >>> read () at ../sysdeps/unix/syscall-template.S:81 >>> 11 Thread 0x7f18fef4e700 (LWP 20695) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 10 Thread 0x7f18fe74d700 (LWP 20696) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 9 Thread 0x7f18fdf4c700 (LWP 20697) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 8 Thread 0x7f18fd74b700 (LWP 20698) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 7 Thread 0x7f18fcf4a700 (LWP 20699) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 6 Thread 0x7f18fc749700 (LWP 20700) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 5 Thread 0x7f18fbf48700 (LWP 20701) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 4 Thread 0x7f18fb747700 (LWP 20702) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 3 Thread 0x7f18faf46700 (LWP 20703) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> 2 Thread 0x7f18fa745700 (LWP 20704) "libvirtd" >>> pthread_cond_wait@@GLIBC_2.3.2 () at >>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>> * 1 Thread 0x7f190892f840 (LWP 20694) "libvirtd" 0x00007f190677d7cd in >>> poll () at ../sysdeps/unix/syscall-template.S:81 >>> >>> attaching thread Id 12 and bt: >>> (gdb) thread 12 >>> [Switching to thread 12 (Thread 0x7f190893d700 (LWP 20883))] >>> #0 0x00007f1906e6684d in read () at >>> ../sysdeps/unix/syscall-template.S:81 >>> 81 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) >>> (gdb) bt >>> #0 0x00007f1906e6684d in read () at >>> ../sysdeps/unix/syscall-template.S:81 >>> #1 0x00007f18f8c415be in read (__nbytes=16, __buf=0x7f18d4000c50, >>> __fd=26) at /usr/include/bits/unistd.h:44 >>> #2 read_all (fd=26, data=data@entry =0x7f18d4000c50, len=len@entry =16, >>> nonblocking=nonblocking@entry =0) at xs.c:374 >>> #3 0x00007f18f8c41675 in read_message (h=h@entry =0x7f18e8001070, >>> nonblocking=nonblocking@entry =0) at xs.c:1139 >>> #4 0x00007f18f8c41e90 in read_thread (arg=0x7f18e8001070) at xs.c:1211 >>> #5 0x00007f1906e5ff35 in start_thread (arg=0x7f190893d700) at >>> pthread_create.c:309 >>> #6 0x00007f1906787c3d in clone () at >>> ../sysdeps/unix/sysv/linux/x86_64/clone.S:111 >>> >>> and then bt full: >>> >>> (gdb) bt full >>> #0 0x00007f1906e6684d in read () at >>> ../sysdeps/unix/syscall-template.S:81 >>> No locals. >>> #1 0x00007f18f8c415be in read (__nbytes=16, __buf=0x7f18d4000c50, >>> __fd=26) at /usr/include/bits/unistd.h:44 >>> No locals. >>> #2 read_all (fd=26, data=data@entry =0x7f18d4000c50, len=len@entry =16, >>> nonblocking=nonblocking@entry =0) at xs.c:374 >>> done = <optimized out> >>> #3 0x00007f18f8c41675 in read_message (h=h@entry =0x7f18e8001070, >>> nonblocking=nonblocking@entry =0) at xs.c:1139 >>> __clframe = {__cancel_routine = <optimized out>, __cancel_arg = >>> 0x7f18d4000c40, __do_it = 1, __cancel_type = <optimized out>} >>> msg = 0x7f18d4000c40 >>> body = 0x0 >>> saved_errno = 0 >>> ret = -1 >>> #4 0x00007f18f8c41e90 in read_thread (arg=0x7f18e8001070) at xs.c:1211 >>> h = 0x7f18e8001070 >>> fd = <optimized out> >>> >> This stack doesn't come from libvirt. I suspect it comes from a library >> that libvirtd is linked with.Yep, a thread created by libxl.>> Maybe libxl? What's the connection uri >> you're using? >> > > i use xen:///. as i said early, i do tests with xen xm´s. xend is disabled, so i use the libxl. >Earlier you mentioned using libvirt 1.1.3 for your Xen hosts. Have you tried the freshly released 1.2.9? I didn't see the problem with libvirt git master and Xen 4.4.1. Regards, Jim
web2
2014-Oct-02 07:49 UTC
Re: [libvirt-users] [libvirt] increase number of libvirt threads by starting tansient guest doamin - is it a bug?
----------------ursprüngliche Nachricht----------------- Von: "Jim Fehlig" jfehlig@suse.com An: "web2" ustermann78@web.de Kopie: "Michal Privoznik" mprivozn@redhat.com , "libvirt-users redhat.com" , "libvirt-list redhat.com" Datum: Wed, 01 Oct 2014 21:38:05 -0600 -------------------------------------------------> web2 wrote: >> Hi >> >> ----------------ursprüngliche Nachricht----------------- >> Von: "Michal Privoznik" mprivozn@redhat.com >> An: "web2" ustermann78@web.de , "libvirt-users redhat.com" >> , "libvirt-list redhat.com" >> Datum: Wed, 01 Oct 2014 18:12:45 +0200 >> ------------------------------------------------- >> >> >> >>> On 01.10.2014 10:31, web2 wrote: >>> >>>> Hello, >>>> >>>> sorry for my later answer. >>>> >>>> so, after i started libvirtd (no vm´s running) and attach gdb i get the >>>> following threads >>>> >>>> (gdb) info thread >>>> Id Target Id Frame >>>> 11 Thread 0x7f18fef4e700 (LWP 20695) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 10 Thread 0x7f18fe74d700 (LWP 20696) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 9 Thread 0x7f18fdf4c700 (LWP 20697) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 8 Thread 0x7f18fd74b700 (LWP 20698) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 7 Thread 0x7f18fcf4a700 (LWP 20699) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 6 Thread 0x7f18fc749700 (LWP 20700) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 5 Thread 0x7f18fbf48700 (LWP 20701) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 4 Thread 0x7f18fb747700 (LWP 20702) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 3 Thread 0x7f18faf46700 (LWP 20703) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 2 Thread 0x7f18fa745700 (LWP 20704) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> * 1 Thread 0x7f190892f840 (LWP 20694) "libvirtd" >>>> 0x00007f190677d7cd in >>>> poll () at ../sysdeps/unix/syscall-template.S:81 >>>> >>>> if i restore an persistent domain, i see the following in gdb: >>>> >>>> Detaching after fork from child process 20880. >>>> Detaching after fork from child process 20882. >>>> [New Thread 0x7f190893d700 (LWP 20883)] >>>> Detaching after fork from child process 20890. >>>> Detaching after fork from child process 20906. >>>> >>>> (gdb) info thread >>>> Id Target Id Frame >>>> 12 Thread 0x7f190893d700 (LWP 20883) "libvirtd" >>>> 0x00007f1906e6684d in >>>> read () at ../sysdeps/unix/syscall-template.S:81 >>>> 11 Thread 0x7f18fef4e700 (LWP 20695) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 10 Thread 0x7f18fe74d700 (LWP 20696) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 9 Thread 0x7f18fdf4c700 (LWP 20697) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 8 Thread 0x7f18fd74b700 (LWP 20698) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 7 Thread 0x7f18fcf4a700 (LWP 20699) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 6 Thread 0x7f18fc749700 (LWP 20700) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 5 Thread 0x7f18fbf48700 (LWP 20701) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 4 Thread 0x7f18fb747700 (LWP 20702) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 3 Thread 0x7f18faf46700 (LWP 20703) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 2 Thread 0x7f18fa745700 (LWP 20704) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> * 1 Thread 0x7f190892f840 (LWP 20694) "libvirtd" >>>> 0x00007f190677d7cd in >>>> poll () at ../sysdeps/unix/syscall-template.S:81 >>>> >>>> if i now destroy this vm i get the following: >>>> >>>> >>>> (gdb) info thread >>>> Id Target Id Frame >>>> 12 Thread 0x7f190893d700 (LWP 20883) "libvirtd" >>>> 0x00007f1906e6684d in >>>> read () at ../sysdeps/unix/syscall-template.S:81 >>>> 11 Thread 0x7f18fef4e700 (LWP 20695) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 10 Thread 0x7f18fe74d700 (LWP 20696) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 9 Thread 0x7f18fdf4c700 (LWP 20697) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 8 Thread 0x7f18fd74b700 (LWP 20698) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 7 Thread 0x7f18fcf4a700 (LWP 20699) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 6 Thread 0x7f18fc749700 (LWP 20700) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 5 Thread 0x7f18fbf48700 (LWP 20701) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 4 Thread 0x7f18fb747700 (LWP 20702) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 3 Thread 0x7f18faf46700 (LWP 20703) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> 2 Thread 0x7f18fa745700 (LWP 20704) "libvirtd" >>>> pthread_cond_wait@@GLIBC_2.3.2 () at >>>> >>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 >>>> >>>> * 1 Thread 0x7f190892f840 (LWP 20694) "libvirtd" >>>> 0x00007f190677d7cd in >>>> poll () at ../sysdeps/unix/syscall-template.S:81 >>>> >>>> attaching thread Id 12 and bt: >>>> (gdb) thread 12 >>>> [Switching to thread 12 (Thread 0x7f190893d700 (LWP 20883))] >>>> #0 0x00007f1906e6684d in read () at >>>> ../sysdeps/unix/syscall-template.S:81 >>>> 81 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) >>>> (gdb) bt >>>> #0 0x00007f1906e6684d in read () at >>>> ../sysdeps/unix/syscall-template.S:81 >>>> #1 0x00007f18f8c415be in read (__nbytes=16, >>>> __buf=0x7f18d4000c50, >>>> __fd=26) at /usr/include/bits/unistd.h:44 >>>> #2 read_all (fd=26, data=data@entry =0x7f18d4000c50, >>>> len=len@entry =16, >>>> nonblocking=nonblocking@entry =0) at xs.c:374 >>>> #3 0x00007f18f8c41675 in read_message (h=h@entry >>>> =0x7f18e8001070, >>>> nonblocking=nonblocking@entry =0) at xs.c:1139 >>>> #4 0x00007f18f8c41e90 in read_thread (arg=0x7f18e8001070) at >>>> xs.c:1211 >>>> #5 0x00007f1906e5ff35 in start_thread (arg=0x7f190893d700) at >>>> pthread_create.c:309 >>>> #6 0x00007f1906787c3d in clone () at >>>> ../sysdeps/unix/sysv/linux/x86_64/clone.S:111 >>>> >>>> and then bt full: >>>> >>>> (gdb) bt full >>>> #0 0x00007f1906e6684d in read () at >>>> ../sysdeps/unix/syscall-template.S:81 >>>> No locals. >>>> #1 0x00007f18f8c415be in read (__nbytes=16, >>>> __buf=0x7f18d4000c50, >>>> __fd=26) at /usr/include/bits/unistd.h:44 >>>> No locals. >>>> #2 read_all (fd=26, data=data@entry =0x7f18d4000c50, >>>> len=len@entry =16, >>>> nonblocking=nonblocking@entry =0) at xs.c:374 >>>> done = <optimized out> >>>> #3 0x00007f18f8c41675 in read_message (h=h@entry >>>> =0x7f18e8001070, >>>> nonblocking=nonblocking@entry =0) at xs.c:1139 >>>> __clframe = {__cancel_routine = <optimized out>, __cancel_arg = >>>> 0x7f18d4000c40, __do_it = 1, __cancel_type = <optimized out>} >>>> msg = 0x7f18d4000c40 >>>> body = 0x0 >>>> saved_errno = 0 >>>> ret = -1 >>>> #4 0x00007f18f8c41e90 in read_thread (arg=0x7f18e8001070) at >>>> xs.c:1211 >>>> h = 0x7f18e8001070 >>>> fd = <optimized out> >>>> >>> This stack doesn't come from libvirt. I suspect it comes from a library >>> that libvirtd is linked with. > > Yep, a thread created by libxl. > >>> Maybe libxl? What's the connection uri >>> you're using? >>> >> >> i use xen:///. as i said early, i do tests with xen xm´s. xend is disabled, so i >> use the libxl. >> > > Earlier you mentioned using libvirt 1.1.3 for your Xen hosts. Have you > tried the freshly released 1.2.9? I didn't see the problem with libvirt > git master and Xen 4.4.1.I use libvirt 1.1.3.5 and Xen 4.3.3 for the tests. I will try a newer version of Xen and then a newer version of libvirt. thanks max> Regards, > Jim > >--
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