Indeed, this object contains invalid pointers. Can you try to run tests/xmlbuffer.c from hwloc's tree? It does export+import+export+compare on the same machine. It would be good to know if it fails on one of the machines you're using here.
https://svn.open-mpi.org/trac/hwloc/browser/branches/v1.2-ompi/tests/xmlbuffer.c?rev=3837&format=txt thanks Brice Le 24/09/2011 17:07, Ralph Castain a écrit : > FWIW: I tried just printing out the contents of that root object immediately > after importing the xml, and it clearly has a problem: > > (gdb) print *obj > $2 = {type = OPAL_HWLOC122_hwloc_OBJ_SYSTEM, os_index = 0, name = 0x101 > <Address 0x101 out of bounds>, memory = { > total_memory = 46912502995240, local_memory = 46912502995240, > page_types_len = 0, page_types = 0x0}, attr = 0x2, > depth = 6900112, logical_index = 0, os_level = 6571424, next_cousin = 0x0, > prev_cousin = 0xffffffff, parent = 0x0, > sibling_rank = 0, next_sibling = 0x0, prev_sibling = 0x0, arity = 145, > children = 0x2aaaab139738, > first_child = 0x2aaaab139738, last_child = 0x0, userdata = 0x0, cpuset = > 0x0, complete_cpuset = 0x0, > online_cpuset = 0x644700, allowed_cpuset = 0x691970, nodeset = 0x6919e0, > complete_nodeset = 0x644c90, > allowed_nodeset = 0x644cb0, distances = 0x6948b0, distances_count = > 6900000, infos = 0x0, infos_count = 0} > > > On Sep 24, 2011, at 9:02 AM, Ralph Castain wrote: > >> 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 >>>>> [email protected] >>>>> http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-devel >>>> >>>> -- >>>> Jeff Squyres >>>> [email protected] >>>> For corporate legal information go to: >>>> http://www.cisco.com/web/about/doing_business/legal/cri/ >>>> >>>> >>>> _______________________________________________ >>>> hwloc-devel mailing list >>>> [email protected] >>>> http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-devel >>> >>> -- >>> Jeff Squyres >>> [email protected] >>> For corporate legal information go to: >>> http://www.cisco.com/web/about/doing_business/legal/cri/ >>> > > _______________________________________________ > hwloc-devel mailing list > [email protected] > http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-devel
