Hi everyone, I tried the suggestions from Cliff and Scott, with no change in behavior. I tried some primitive debugging and noticed that NUMA_NUM_NODES was 128 and the node argument to numa_node_to_cpus_v1 was 132. When I changed the definition of NUMA_NUM_NODES in numa.h to 2048, I can eliminate the segmentation fault. Now I'm getting "mbind: invalid argument" errors. Thanks, --Michael On Mon, Nov 1, 2010 at 6:59 PM, Cliff Wickman <cpw@xxxxxxx> wrote: > On Mon, Nov 01, 2010 at 03:52:59PM -0400, Michael Spiegel wrote: >> Hi, >> >> I'm trying to run the HotSpot Java VM on an SGI UV 1000 with 4096 >> cores. When I enable the NUMA-aware garbage collection algorithm, I >> get a segmentation fault as the virtual machine is initializing. The >> sigsegv is occurring at one of the memcpy's in numa_node_to_cpus_v1, >> although I'm afraid I can't determine whether libnuma is being called >> correctly or incorrectly. I am testing on a system that has numactl >> 2.0.5. >> >> Thanks, >> --Michael > > Hi Michael, > > I see that Scott Lundal gave you a possible fix. > There were some important corrections added to the latest version, so > if you could try building numactl/libnuma from numactl-2.0.6-rc3.tar.gz > that would be an interesting test. > (ftp://oss.sgi.com/www/projects/libnuma/download/) >> >> #6 <signal handler called> >> #7 0x00007f4066fb9ad0 in memcpy () from /lib64/libc.so.6 >> #8 0x00007f40658d4c6a in numa_node_to_cpus_v1 (node=132, buffer=0x40112d40, >> bufferlen=<value optimized out>) at libnuma.c:1203 >> #9 0x00007f4066a85255 in os::Linux::rebuild_cpu_to_node_map() () >> from /usr/ue/0/mspiegel/jdk1.6.0_22/jre/lib/amd64/server/libjvm.so >> #10 0x00007f4066a8502f in os::Linux::libnuma_init() () >> from /usr/ue/0/mspiegel/jdk1.6.0_22/jre/lib/amd64/server/libjvm.so >> #11 0x00007f4066a86c38 in os::init_2() () >> from /usr/ue/0/mspiegel/jdk1.6.0_22/jre/lib/amd64/server/libjvm.so >> #12 0x00007f4066b81c4d in Threads::create_vm(JavaVMInitArgs*, bool*) () >> from /usr/ue/0/mspiegel/jdk1.6.0_22/jre/lib/amd64/server/libjvm.so >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-numa" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- > Cliff Wickman > SGI > cpw@xxxxxxx > (651) 683-3824 > -- To unsubscribe from this list: send the line "unsubscribe linux-numa" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
