Here's the trace: #0 0x00002aaaaae61737 in hwloc__xml_export_object (output=0x7fffffffd890, topology=0x695f10, obj=0x2aaaab139b28) at topology-xml.c:1094 #1 0x00002aaaaae61b69 in hwloc___nolibxml_prepare_export (topology=0x695f10, xmlbuffer=0x698a70 "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<!DOCTYPE topology SYSTEM \"hwloc.dtd\">\n<topology>\n <object type=\"Unknown\" os_level=\"-1424778408\" os_index=\"10922\" cpuset=\"0xf...f\" complete_cpuset=\"0xf...f\" onl"..., buflen=16384) at topology-xml.c:1193 #2 0x00002aaaaae61be0 in hwloc__nolibxml_prepare_export (topology=0x695f10, bufferp=0x7fffffffd988, buflenp=0x7fffffffd97c) at topology-xml.c:1207 #3 0x00002aaaaae61d02 in opal_hwloc122_hwloc_topology_export_xmlbuffer (topology=0x695f10, xmlbuffer=0x7fffffffd988, buflen=0x7fffffffd97c) at topology-xml.c:1281 #4 0x00002aaaaae529f4 in opal_hwloc_compare (topo1=0x695f10, topo2=0x6915c0, type=22 '\026') at base/hwloc_base_dt.c:183 #5 0x00002aaaaadf348c in opal_dss_compare (value1=0x695f10, value2=0x6915c0, type=22 '\026') at dss/dss_compare.c:39 #6 0x00002aaaaad9b5f7 in process_orted_launch_report (fd=-1, event=1, data=0x6444d0) at base/plm_base_launch_support.c:564 #7 0x00002aaaaae3881f in event_process_active_single_queue (base=0x60dd60, activeq=0x6111e0) at event.c:1329 #8 0x00002aaaaae38c71 in event_process_active (base=0x60dd60) at event.c:1396 #9 0x00002aaaaae3902b in opal_libevent2012_event_base_loop (base=0x60dd60, flags=1) at event.c:1598 #10 0x00002aaaaadf080d in opal_progress () at runtime/opal_progress.c:189 #11 0x00002aaaaad9bbfa in orte_plm_base_daemon_callback (num_daemons=2) at base/plm_base_launch_support.c:666 #12 0x00002aaaaada49e1 in plm_slurm_launch_job (jdata=0x67a500) at plm_slurm_module.c:404 #13 0x0000000000403822 in orterun (argc=4, argv=0x7fffffffe1d8) at orterun.c:817 #14 0x0000000000402aa3 in main (argc=4, argv=0x7fffffffe1d8) at main.c:13
And the error report Program received signal SIGSEGV, Segmentation fault. 0x00002aaaaae61737 in hwloc__xml_export_object (output=0x7fffffffd890, topology=0x695f10, obj=0x2aaaab139b28) at topology-xml.c:1094 1094 sprintf(tmp, "%llu", (unsigned long long) obj->memory.page_types[i].count); (gdb) print obj $1 = (opal_hwloc122_hwloc_obj_t) 0x2aaaab139b28 (gdb) print *obj $2 = {type = 2870188824, os_index = 10922, name = 0x2aaaab139b18 "\b\233\023\253\252*", memory = {total_memory = 6579376, local_memory = 6579376, page_types_len = 2870188856, page_types = 0x2aaaab139b38}, attr = 0x2aaaab139b48, depth = 2870188872, logical_index = 10922, os_level = -1424778408, next_cousin = 0x2aaaab139b58, prev_cousin = 0x2aaaab139b68, parent = 0x2aaaab139b68, sibling_rank = 2870188920, next_sibling = 0x2aaaab139b78, prev_sibling = 0x2aaaab139b88, arity = 2870188936, children = 0x2aaaab139b98, first_child = 0x2aaaab139b98, last_child = 0x2aaaab139ba8, userdata = 0x2aaaab139ba8, cpuset = 0x2aaaab139bb8, complete_cpuset = 0x2aaaab139bb8, online_cpuset = 0x2aaaab139bc8, allowed_cpuset = 0x2aaaab139bc8, nodeset = 0x2aaaab139bd8, complete_nodeset = 0x2aaaab139bd8, allowed_nodeset = 0x2aaaab139be8, distances = 0x2aaaab139be8, distances_count = 2870189048, infos = 0x2aaaab139bf8, infos_count = 2870189064} (gdb) print obj->memory $3 = {total_memory = 6579376, local_memory = 6579376, page_types_len = 2870188856, page_types = 0x2aaaab139b38} (gdb) print obj->memory.page_types $4 = (struct opal_hwloc122_hwloc_obj_memory_page_type_s *) 0x2aaaab139b38 (gdb) print i $5 = 1612 (gdb) print obj->memory.page_types[1600] $6 = {size = 0, count = 0} (gdb) print obj->memory.page_types[1612] Cannot access memory at address 0x2aaaab13fff8 (gdb) print obj->memory.page_types[1611] $7 = {size = 0, count = 0} (gdb) The whole obj looks like trash to me. I looked a little more - the object referenced is the root object: 1193 hwloc__xml_export_object (&output, topology, hwloc_get_root_obj(topology)); I'm continuing to look in case I'm doing something stupid, but the code is pretty linear here - unpack, import, export for compare. On Sep 24, 2011, at 8:59 AM, Jeff Squyres wrote: > Here's some feedback from Ralph -- any idea what's going wrong here? > > ----- > > 1. I export a topology into xml using > > hwloc_topology_export_xmlbuffer(t, &xmlbuffer, &len); > > I then pack and send the string. > > 2. I unpack the string on the other end and import it into a topology > hwloc_topology_init(&t); > if (0 != (rc = hwloc_topology_set_xmlbuffer(t, xmlbuffer, > strlen(xmlbuffer)))) { > hwloc_topology_destroy(t); > goto cleanup; > } > hwloc_topology_load(t); > > 3. I then need to compare two topologies, so I export the topology I received > into another xml string > hwloc_topology_export_xmlbuffer(t1, &x1, &l1); > > It is this export that fails, which implies to me that somehow the import > didn't work right. Note that this code worked fine with libxml2, so this is a > regression. > > > On Sep 22, 2011, at 9:39 AM, Jeff Squyres wrote: > >> Yes, I can get some testing of the ompi branch pretty quickly. I can bring >> in a new copy of this later today and see what we can see. >> >> Many thanks! >> >> >> On Sep 19, 2011, at 9:05 AM, Brice Goglin wrote: >> >>> I pushed the new minimalistic XML import/export implementation without >>> libxml2 to the nolibxml branch. If libxml2 is available, it's still used >>> by default. --disable-libxml2 or some env variables can be used for >>> force the minimalistic implementation if needed. The minimalistic implem >>> is only guaranteed to import XML files that were generated by hwloc >>> (even if libxml was enabled there). >>> >>> I also backported most of this to the new v1.2-ompi branch (required to >>> backport some other XML cleanups from trunk). This branch will now serve >>> as a base for Open MPI's embedded hwloc. The idea is to have a complete >>> v1.2 + nolibxml somewhere so that we can at least run make check (Open >>> MPI does not embed enough to run hwloc's make check). >>> >>> How do we proceed now? Can we have the OMPI guys test the new code soon? >>> Should I wait for their feedback before merging the nolibxml branch into >>> the trunk? I'd like to merge this in v1.3 too (and basically release rc2 >>> as the actual first feature-complete RC), so getting feedback early >>> might be appreciated. >>> >>> Brice >>> >>> _______________________________________________ >>> hwloc-devel mailing list >>> hwloc-de...@open-mpi.org >>> http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-devel >> >> >> -- >> Jeff Squyres >> jsquy...@cisco.com >> For corporate legal information go to: >> http://www.cisco.com/web/about/doing_business/legal/cri/ >> >> >> _______________________________________________ >> hwloc-devel mailing list >> hwloc-de...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-devel > > > -- > Jeff Squyres > jsquy...@cisco.com > For corporate legal information go to: > http://www.cisco.com/web/about/doing_business/legal/cri/ >