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Tue, 27 Jul 2021 10:03:22 +0000 (GMT) Received: from b03ledav001.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B10EE6E05E; Tue, 27 Jul 2021 10:03:19 +0000 (GMT) Received: from skywalker.ibmuc.com (unknown [9.85.74.145]) by b03ledav001.gho.boulder.ibm.com (Postfix) with ESMTP; Tue, 27 Jul 2021 10:03:19 +0000 (GMT) From: "Aneesh Kumar K.V" To: linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au Subject: [PATCH v6 0/6] Add support for FORM2 associativity Date: Tue, 27 Jul 2021 15:33:05 +0530 Message-Id: <20210727100311.310969-1-aneesh.kumar@linux.ibm.com> X-Mailer: git-send-email 2.31.1 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: WDHXFYe6yFo9jHn4dwEi4oYnigNdyupe X-Proofpoint-ORIG-GUID: YnVU5_Znn2BLzdn_tIZaaUPDyO7rx9yV Content-Transfer-Encoding: 8bit X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391, 18.0.790 definitions=2021-07-27_06:2021-07-27, 2021-07-27 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 clxscore=1015 mlxlogscore=999 mlxscore=0 spamscore=0 priorityscore=1501 lowpriorityscore=0 bulkscore=0 impostorscore=0 adultscore=0 suspectscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2107140000 definitions=main-2107270055 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Nathan Lynch , "Aneesh Kumar K.V" , Daniel Henrique Barboza , David Gibson Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Form2 associativity adds a much more flexible NUMA topology layout than what is provided by Form1. More details can be found in patch 7. $ numactl -H ... node distances: node 0 1 2 3 0: 10 11 222 33 1: 44 10 55 66 2: 77 88 10 99 3: 101 121 132 10 $ After DAX kmem memory add # numactl -H available: 5 nodes (0-4) ... node distances: node 0 1 2 3 4 0: 10 11 222 33 240 1: 44 10 55 66 255 2: 77 88 10 99 255 3: 101 121 132 10 230 4: 255 255 255 230 10 PAPR SCM now use the numa distance details to find the numa_node and target_node for the device. kvaneesh@ubuntu-guest:~$ ndctl list -N -v [ { "dev":"namespace0.0", "mode":"devdax", "map":"dev", "size":1071644672, "uuid":"d333d867-3f57-44c8-b386-d4d3abdc2bf2", "raw_uuid":"915361ad-fe6a-42dd-848f-d6dc9f5af362", "daxregion":{ "id":0, "size":1071644672, "devices":[ { "chardev":"dax0.0", "size":1071644672, "target_node":4, "mode":"devdax" } ] }, "align":2097152, "numa_node":3 } ] kvaneesh@ubuntu-guest:~$ The above output is with a Qemu command line -numa node,nodeid=4 \ -numa dist,src=0,dst=1,val=11 -numa dist,src=0,dst=2,val=222 -numa dist,src=0,dst=3,val=33 -numa dist,src=0,dst=4,val=240 \ -numa dist,src=1,dst=0,val=44 -numa dist,src=1,dst=2,val=55 -numa dist,src=1,dst=3,val=66 -numa dist,src=1,dst=4,val=255 \ -numa dist,src=2,dst=0,val=77 -numa dist,src=2,dst=1,val=88 -numa dist,src=2,dst=3,val=99 -numa dist,src=2,dst=4,val=255 \ -numa dist,src=3,dst=0,val=101 -numa dist,src=3,dst=1,val=121 -numa dist,src=3,dst=2,val=132 -numa dist,src=3,dst=4,val=230 \ -numa dist,src=4,dst=0,val=255 -numa dist,src=4,dst=1,val=255 -numa dist,src=4,dst=2,val=255 -numa dist,src=4,dst=3,val=230 \ -object memory-backend-file,id=memnvdimm1,prealloc=yes,mem-path=$PMEM_DISK,share=yes,size=${PMEM_SIZE} \ -device nvdimm,label-size=128K,memdev=memnvdimm1,id=nvdimm1,slot=4,uuid=72511b67-0b3b-42fd-8d1d-5be3cae8bcaa,node=4 Qemu changes can be found at https://lore.kernel.org/qemu-devel/20210616011944.2996399-1-danielhb413@gmail.com/ Changes from v5: * Fix build error reported by kernel test robot * Address review feedback Changes from v4: * Drop DLPAR related device tree property for now because both Qemu nor PowerVM will provide the distance details of all possible NUMA nodes during boot. * Rework numa distance code based on review feedback. Changes from v3: * Drop PAPR SCM specific changes and depend completely on NUMA distance information. Changes from v2: * Add nvdimm list to Cc: * update PATCH 8 commit message. Changes from v1: * Update FORM2 documentation. * rename max_domain_index to max_associativity_domain_index Aneesh Kumar K.V (6): powerpc/pseries: rename min_common_depth to primary_domain_index powerpc/pseries: Rename TYPE1_AFFINITY to FORM1_AFFINITY powerpc/pseries: Consolidate different NUMA distance update code paths powerpc/pseries: Add a helper for form1 cpu distance powerpc/pseries: Add support for FORM2 associativity powerpc/pseries: Consolidate form1 distance initialization into a helper Documentation/powerpc/associativity.rst | 103 ++++ arch/powerpc/include/asm/firmware.h | 7 +- arch/powerpc/include/asm/prom.h | 3 +- arch/powerpc/include/asm/topology.h | 6 +- arch/powerpc/kernel/prom_init.c | 3 +- arch/powerpc/mm/numa.c | 440 ++++++++++++++---- arch/powerpc/platforms/pseries/firmware.c | 3 +- arch/powerpc/platforms/pseries/hotplug-cpu.c | 2 + .../platforms/pseries/hotplug-memory.c | 2 + arch/powerpc/platforms/pseries/lpar.c | 4 +- 10 files changed, 462 insertions(+), 111 deletions(-) create mode 100644 Documentation/powerpc/associativity.rst -- 2.31.1