Re: [hwloc-users] lstopo hangs for centos 7
I did a debug build. Found it loops forever in this loop in
topology-x86.c:404.
/* Get package/core/thread information from cpuid 0x0b
* (Intel x2APIC)
*/
if (cpuid_type == intel && has_x2apic(features)) {
unsigned level, apic_nextshift, apic_number, apic_type, apic_id = 0,
apic_shift = 0, id;
for (level = 0; ; level++) {
ecx = level;
eax = 0x0b;
hwloc_x86_cpuid(&eax, &ebx, &ecx, &edx);
if (!eax && !ebx)
break;
}
On Sun, Jan 31, 2016 at 8:30 PM, Christopher Samuel
wrote:
> On 01/02/16 15:09, Jianjun Wen wrote:
>
> > 0x77bce13c in look_proc () from /lib64/libhwloc.so.5
> >
> > Always the same place.
>
> pstack on the process when stuck might give more of an insight as it
> should give more of a stack trace.
>
> Also running lstopo under strace should show what it is trying to do at
> that point.
>
> All the best,
> Chris
> --
> Christopher SamuelSenior Systems Administrator
> VLSCI - Victorian Life Sciences Computation Initiative
> Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545
> http://www.vlsci.org.au/ http://twitter.com/vlsci
>
> ___
> hwloc-users mailing list
> hwloc-us...@open-mpi.org
> Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-users
> Link to this post:
> http://www.open-mpi.org/community/lists/hwloc-users/2016/01/1251.php
>
--
-Jianjun Wen
Wancube.com - 3D photography
Phone: 408 888 7023
Re: [hwloc-users] lstopo hangs for centos 7
On 01/02/16 15:09, Jianjun Wen wrote: > 0x77bce13c in look_proc () from /lib64/libhwloc.so.5 > > Always the same place. pstack on the process when stuck might give more of an insight as it should give more of a stack trace. Also running lstopo under strace should show what it is trying to do at that point. All the best, Chris -- Christopher SamuelSenior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.org.au/ http://twitter.com/vlsci
Re: [hwloc-users] lstopo hangs for centos 7
I just realize that yum on centos 7 use hwloc version 1.7. I Downloaded 1.11.2 version source, built and install. Still hangs. 0x77bcb32c in hwloc_x86_cpuid (edx=, ecx=, ebx=0x7fffdbec, eax=) at /home/wen/Downloads/hwloc-1.11.2/include/private/cpuid-x86.h:67 67 __asm__( On Sun, Jan 31, 2016 at 8:09 PM, Jianjun Wen wrote: > Hi Brice > Thanks for the reply. > I use yum install hwloc to install it. > The cpu usage is 100%. > I got this after Ctrl + C, and c, several times: > > 0x77bce13c in look_proc () from /lib64/libhwloc.so.5 > > Always the same place. > > On Sun, Jan 31, 2016 at 12:29 AM, Brice Goglin > wrote: > >> Hello >> >> Thanks for the report. I have never seen this issue. I have CentOS 7 VMs >> (kvm), lstopo works fine. Did you try this in similar VMs in the past? >> >> When you say "latest hwloc", do you mean "build latest tarball" (1.11.2) >> or "installed latest centos package" (1.7)? >> >> First thing to check: run lstopo, let it hang, and check under top >> whether it uses 100% CPU or 0% CPU (to see if that's an infinite loop or >> not). >> >> Then, run it under gdb: >> $ gdb lstopo >> Type 'r' and Enter >> When things hang, do ctrl-c >> Type "where" and send the output to us. >> >> If you got 100% in top above, you should do this multiple time. After >> "where", type 'c' to go back to the execution, ctrl+c again, "where" again >> and check whether the backtrace is similar. >> >> Brice >> >> >> >> >> Le 31/01/2016 04:48, Jianjun Wen a écrit : >> >> I installed the latest centos 7 (1151) on VM (vmware), then installed >> latest hwloc. >> lstopo command hangs. >> >> hwloc_topology_load() >> function call also hangs. >> >> Is this an know issue? How to find out what's wrong? >> >> thanks >> -- >> -Jianjun Wen >> Wancube.com - 3D photography >> Phone: 408 888 7023 >> >> >> ___ >> hwloc-users mailing listhwloc-us...@open-mpi.org >> Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-users >> Link to this post: >> http://www.open-mpi.org/community/lists/hwloc-users/2016/01/1247.php >> >> >> >> ___ >> hwloc-users mailing list >> hwloc-us...@open-mpi.org >> Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-users >> Link to this post: >> http://www.open-mpi.org/community/lists/hwloc-users/2016/01/1248.php >> > > > > -- > -Jianjun Wen > Wancube.com - 3D photography > Phone: 408 888 7023 > -- -Jianjun Wen Wancube.com - 3D photography Phone: 408 888 7023
Re: [hwloc-users] lstopo hangs for centos 7
Hi Brice Thanks for the reply. I use yum install hwloc to install it. The cpu usage is 100%. I got this after Ctrl + C, and c, several times: 0x77bce13c in look_proc () from /lib64/libhwloc.so.5 Always the same place. On Sun, Jan 31, 2016 at 12:29 AM, Brice Goglin wrote: > Hello > > Thanks for the report. I have never seen this issue. I have CentOS 7 VMs > (kvm), lstopo works fine. Did you try this in similar VMs in the past? > > When you say "latest hwloc", do you mean "build latest tarball" (1.11.2) > or "installed latest centos package" (1.7)? > > First thing to check: run lstopo, let it hang, and check under top whether > it uses 100% CPU or 0% CPU (to see if that's an infinite loop or not). > > Then, run it under gdb: > $ gdb lstopo > Type 'r' and Enter > When things hang, do ctrl-c > Type "where" and send the output to us. > > If you got 100% in top above, you should do this multiple time. After > "where", type 'c' to go back to the execution, ctrl+c again, "where" again > and check whether the backtrace is similar. > > Brice > > > > > Le 31/01/2016 04:48, Jianjun Wen a écrit : > > I installed the latest centos 7 (1151) on VM (vmware), then installed > latest hwloc. > lstopo command hangs. > > hwloc_topology_load() > function call also hangs. > > Is this an know issue? How to find out what's wrong? > > thanks > -- > -Jianjun Wen > Wancube.com - 3D photography > Phone: 408 888 7023 > > > ___ > hwloc-users mailing listhwloc-us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-users > Link to this post: > http://www.open-mpi.org/community/lists/hwloc-users/2016/01/1247.php > > > > ___ > hwloc-users mailing list > hwloc-us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-users > Link to this post: > http://www.open-mpi.org/community/lists/hwloc-users/2016/01/1248.php > -- -Jianjun Wen Wancube.com - 3D photography Phone: 408 888 7023
Re: [hwloc-users] lstopo hangs for centos 7
Hello Thanks for the report. I have never seen this issue. I have CentOS 7 VMs (kvm), lstopo works fine. Did you try this in similar VMs in the past? When you say "latest hwloc", do you mean "build latest tarball" (1.11.2) or "installed latest centos package" (1.7)? First thing to check: run lstopo, let it hang, and check under top whether it uses 100% CPU or 0% CPU (to see if that's an infinite loop or not). Then, run it under gdb: $ gdb lstopo Type 'r' and Enter When things hang, do ctrl-c Type "where" and send the output to us. If you got 100% in top above, you should do this multiple time. After "where", type 'c' to go back to the execution, ctrl+c again, "where" again and check whether the backtrace is similar. Brice Le 31/01/2016 04:48, Jianjun Wen a écrit : > I installed the latest centos 7 (1151) on VM (vmware), then installed > latest hwloc. > lstopo command hangs. > > hwloc_topology_load() > function call also hangs. > > Is this an know issue? How to find out what's wrong? > > thanks > -- > -Jianjun Wen > Wancube.com - 3D photography > Phone: 408 888 7023 > > > ___ > hwloc-users mailing list > hwloc-us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-users > Link to this post: > http://www.open-mpi.org/community/lists/hwloc-users/2016/01/1247.php
