Thanks again! Yes, I did get warnings, but -- now that I am taking a closer look -- I can see that the warning is different. It complains about L2 cache:
**************************************************************************** * hwloc 1.11.0 has encountered what looks like an error from the operating system. * * L2 (P#0 cpuset 0x00000003) intersects with Group0 (P#0 cpuset 0x00000081) without inclusion! * Error occurred in topology.c line 983 * * The following FAQ entry in the hwloc documentation may help: * What should I do when hwloc reports "operating system" warnings? * Otherwise please report this error message to the hwloc user's mailing list, * along with the output+tarball generated by the hwloc-gather-topology script. **************************************************************************** 2017-01-03 17:23 GMT+09:00 Brice Goglin <brice.gog...@inria.fr>: > Thanks > > Surprisingly, I don't see any L1i in the XML output either. Did you get > warnings during this run "HWLOC_COMPONENTS=x86 lstopo foo.xml" ? > > Indeed, you (very likely) don't care about that warning in the AMD SDK. > Pass HWLOC_HIDE_ERRORS=1 in the environment to silence it. > > Brice > > > > Le 03/01/2017 07:59, Johannes Goller a écrit : > > Hi Brice, > > thank you very much for looking into this! > > I am attaching the generated foo.xml. > > I actually came across this error message when trying to play with OpenCL, > using the AMD SDK API. My main interest is in getting that to work on the > GPU, and that might still work on my current kernel (4.8), even if I get > warnings like the one reported. > > > johannes. > > 2017-01-03 15:15 GMT+09:00 Brice Goglin <brice.gog...@inria.fr>: > >> Hello Johannes >> >> I think there are two bugs here. >> >> First one is that each "dual-core compute unit" is reported as a single >> core with two hardware threads. That's a kernel bug that appeared in 4.6. >> There's a fix at https://lkml.org/lkml/2016/11/29/852 but I don't think >> it has been applied yet. >> >> The second bug is a conflict between dual-core compute unit sharing and >> L1i. I am not sure which one is actually buggy. Can you run >> "HWLOC_COMPONENTS=x86 lstopo foo.xml" and send the generated foo.xml? (this >> is our raw detection that works around the kernel detection). >> >> Trying a Linux kernel <= 4.5 may help in the meantime. >> >> thanks >> Brice >> >> >> >> >> Le 03/01/2017 05:29, Johannes Goller a écrit : >> >> As requested on >> <https://www.open-mpi.org/projects/hwloc/doc/v1.10.1/a00028.php> >> https://www.open-mpi.org/projects/hwloc/doc/v1.10.1/a00028.php ("What >> should I do when hwloc reports 'operating system' warnings?"), I am >> reporting the warning/error I received as follows >> >> ************************************************************ >> **************** >> * hwloc 1.11.0 has encountered what looks like an error from the >> operating system. >> * >> * L1i (cpuset 0x00000003) intersects with Core (P#0 cpuset 0x00000081) >> without inclusion! >> * Error occurred in topology.c line 983 >> * >> * The following FAQ entry in the hwloc documentation may help: >> * What should I do when hwloc reports "operating system" warnings? >> * Otherwise please report this error message to the hwloc user's mailing >> list, >> * along with the output+tarball generated by the hwloc-gather-topology >> script. >> ************************************************************ >> **************** >> >> Please find the tarball attached. >> >> >> >> regards, >> >> Johannes Goller. >> >> >> >> _______________________________________________ >> hwloc-users mailing >> listhwloc-us...@lists.open-mpi.orghttps://rfd.newmexicoconsortium.org/mailman/listinfo/hwloc-users >> >> _______________________________________________ hwloc-users mailing list >> hwloc-users@lists.open-mpi.org https://rfd.newmexicoconsortiu >> m.org/mailman/listinfo/hwloc-users > > _______________________________________________ > hwloc-users mailing > listhwloc-us...@lists.open-mpi.orghttps://rfd.newmexicoconsortium.org/mailman/listinfo/hwloc-users > > > _______________________________________________ > hwloc-users mailing list > hwloc-users@lists.open-mpi.org > https://rfd.newmexicoconsortium.org/mailman/listinfo/hwloc-users >
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