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6a6dcae8f4
linux/block
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Ming Lei 6a6dcae8f4 blk-mq: Build default queue map via group_cpus_evenly() 
The default queue mapping builder of blk_mq_map_queues doesn't take NUMA
topo into account, so the built mapping is pretty bad, since CPUs
belonging to different NUMA node are assigned to same queue. It is
observed that IOPS drops by ~30% when running two jobs on same hctx
of null_blk from two CPUs belonging to two NUMA nodes compared with
from same NUMA node.

Address the issue by reusing group_cpus_evenly() for building queue mapping
since group_cpus_evenly() does group cpus according to CPU/NUMA locality.

Also performance data becomes more stable with this given correct queue
mapping is applied wrt. numa locality viewpoint, for example, on one two
nodes arm64 machine with 160 cpus, node 0(cpu 0~79), node 1(cpu 80~159):

1) modprobe null_blk nr_devices=1 submit_queues=2

2) run 'fio(t/io_uring -p 0 -n 4 -r 20 /dev/nullb0)', and observe that
IOPS becomes much stable on multiple tests:

 - unpatched: IOPS is 2.5M ~ 4.5M
 - patched:   IOPS is 4.3M ~ 5.0M

Lots of drivers may benefit from the change, such as nvme pci poll,
nvme tcp, ...

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Jens Axboe <axboe@kernel.dk>                                                                                                                                                                                                    
Link: https://lore.kernel.org/r/20221227022905.352674-7-ming.lei@redhat.com
2023-01-17 18:50:06 +01:00
..
partitions block: don't add partitions if GD_SUPPRESS_PART_SCAN is set 2022-09-03 11:29:03 -06:00
badblocks.c block/badblocks: Remove redundant assignments 2022-04-23 07:15:26 -06:00
bdev.c block: bdev & blktrace: use consistent function doc. notation 2022-12-01 09:16:46 -07:00
bfq-cgroup.c block, bfq: replace 0/1 with false/true in bic apis 2022-12-14 09:51:11 -07:00
bfq-iosched.c block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq 2022-12-26 12:09:56 -07:00
bfq-iosched.h block, bfq: only do counting of pending-request for BFQ_GROUP_IOSCHED 2022-12-15 05:11:59 -07:00
bfq-wf2q.c block, bfq: only do counting of pending-request for BFQ_GROUP_IOSCHED 2022-12-15 05:11:59 -07:00
bio-integrity.c block: pass struct queue_limits to the bio splitting helpers 2022-08-02 21:08:53 -06:00
bio.c Revert "block: bio_copy_data_iter" 2023-01-04 14:43:27 -07:00
blk-cgroup-fc-appid.c cgroup: Homogenize cgroup_get_from_id() return value 2022-08-26 10:57:41 -10:00
blk-cgroup-rwstat.c blk-cgroup: Fix the recursive blkg rwstat 2021-03-05 11:32:15 -07:00
blk-cgroup-rwstat.h block: Use the new blk_opf_t type 2022-07-14 12:14:30 -06:00
blk-cgroup.c blk-iolatency: Fix memory leak on add_disk() failures 2022-12-14 12:42:55 -07:00
blk-cgroup.h blk-cgroup: Optimize blkcg_rstat_flush() 2022-11-16 16:58:44 -07:00
blk-core.c block: fix use-after-free of q->q_usage_counter 2022-12-15 05:23:11 -07:00
blk-crypto-fallback.c treewide: use get_random_bytes() when possible 2022-10-11 17:42:58 -06:00
blk-crypto-internal.h blk-crypto: pass a gendisk to blk_crypto_sysfs_{,un}register 2022-11-30 11:09:00 -07:00
blk-crypto-profile.c blk-crypto: Add a missing include directive 2022-11-23 10:38:54 -07:00
blk-crypto-sysfs.c block: untangle request_queue refcounting from sysfs 2022-11-30 11:09:00 -07:00
blk-crypto.c for-6.2/block-2022-12-08 2022-12-13 10:43:59 -08:00
blk-flush.c block: change request end_io handler to pass back a return value 2022-09-30 07:49:09 -06:00
blk-ia-ranges.c block: untangle request_queue refcounting from sysfs 2022-11-30 11:09:00 -07:00
blk-integrity.c blk-crypto: remove blk_crypto_unregister() 2021-11-29 06:38:51 -07:00
blk-ioc.c block: fix default IO priority handling again 2022-06-27 06:29:12 -06:00
blk-iocost.c treewide: Convert del_timer*() to timer_shutdown*() 2022-12-25 13:38:09 -08:00
blk-iolatency.c treewide: Convert del_timer*() to timer_shutdown*() 2022-12-25 13:38:09 -08:00
blk-ioprio.c blk-ioprio: pass a gendisk to blk_ioprio_init and blk_ioprio_exit 2022-09-26 19:09:31 -06:00
blk-ioprio.h blk-ioprio: pass a gendisk to blk_ioprio_init and blk_ioprio_exit 2022-09-26 19:09:31 -06:00
blk-lib.c blk-lib: fix blkdev_issue_secure_erase 2022-09-15 00:25:17 -06:00
blk-map.c block: set FOLL_PCI_P2PDMA in bio_map_user_iov() 2022-11-09 11:29:21 -07:00
blk-merge.c block: don't allow splitting of a REQ_NOWAIT bio 2023-01-04 13:24:44 -07:00
blk-mq-cpumap.c blk-mq: Build default queue map via group_cpus_evenly() 2023-01-17 18:50:06 +01:00
blk-mq-debugfs-zoned.c block: move zone related fields to struct gendisk 2022-07-06 06:46:26 -06:00
blk-mq-debugfs.c for-6.1/block-2022-10-03 2022-10-07 09:19:14 -07:00
blk-mq-debugfs.h block: remove per-disk debugfs files in blk_unregister_queue 2022-06-17 07:31:05 -06:00
blk-mq-pci.c block: Change the return type of blk_mq_map_queues() into void 2022-08-22 10:07:53 -06:00
blk-mq-rdma.c block: Change the return type of blk_mq_map_queues() into void 2022-08-22 10:07:53 -06:00
blk-mq-sched.c block: split elevator_switch 2022-11-01 09:12:24 -06:00
blk-mq-sched.h block: move blk_mq_sched_assign_ioc to blk-ioc.c 2021-11-29 06:41:29 -07:00
blk-mq-sysfs.c blk-mq: fix possible memleak when register 'hctx' failed 2022-11-25 06:34:03 -07:00
blk-mq-tag.c sbitmap: fix batched wait_cnt accounting 2022-09-12 00:10:34 -06:00
blk-mq-tag.h blk-mq: blk_mq_tag_busy is no need to return a value 2022-06-27 06:29:12 -06:00
blk-mq-virtio.c block: Change the return type of blk_mq_map_queues() into void 2022-08-22 10:07:53 -06:00
blk-mq.c block: handle bio_split_to_limits() NULL return 2023-01-04 09:05:23 -07:00
blk-mq.h blk-mq: move the srcu_struct used for quiescing to the tagset 2022-11-02 08:35:34 -06:00
blk-pm.c scsi: block: pm: Always set request queue runtime active in blk_post_runtime_resume() 2021-12-22 23:38:29 -05:00
blk-pm.h block: Remove unused blk_pm_*() function definitions 2021-02-22 06:33:48 -07:00
blk-rq-qos.c block/rq_qos: Use atomic_try_cmpxchg in atomic_inc_below 2022-07-12 14:38:52 -06:00
blk-rq-qos.h block/blk-rq-qos: delete useless enmu RQ_QOS_IOPRIO 2022-09-21 19:50:53 -06:00
blk-settings.c for-6.2/block-2022-12-08 2022-12-13 10:43:59 -08:00
blk-stat.c block: make queue stat accounting a reference 2021-12-14 17:23:05 -07:00
blk-stat.h block: make queue stat accounting a reference 2021-12-14 17:23:05 -07:00
blk-sysfs.c block: untangle request_queue refcounting from sysfs 2022-11-30 11:09:00 -07:00
blk-throttle.c blk-throttle: Use more suitable time_after check for update of slice_start 2022-12-05 13:45:31 -07:00
blk-throttle.h blk-throttle: pass a gendisk to blk_throtl_cancel_bios 2022-09-26 19:17:28 -06:00
blk-timeout.c block: blk-timeout: delete duplicated word 2020-07-31 16:29:47 -06:00
blk-wbt.c blk-wbt: don't enable throttling if default elevator is bfq 2022-10-23 18:59:17 -06:00
blk-wbt.h blk-wbt: don't show valid wbt_lat_usec in sysfs while wbt is disabled 2022-10-23 18:59:17 -06:00
blk-zoned.c block: adapt blk_mq_plug() to not plug for writes that require a zone lock 2022-09-29 07:45:47 -06:00
blk.h for-6.2/block-2022-12-08 2022-12-13 10:43:59 -08:00
bounce.c block: change the blk_queue_bounce calling convention 2022-08-02 17:22:54 -06:00
bsg-lib.c blk-mq: move the call to blk_put_queue out of blk_mq_destroy_queue 2022-10-25 08:25:10 -06:00
bsg.c Driver Core changes for 6.2-rc1 2022-12-16 03:54:54 -08:00
disk-events.c block: remove genhd.h 2022-02-02 07:49:59 -07:00
elevator.c block: untangle request_queue refcounting from sysfs 2022-11-30 11:09:00 -07:00
elevator.h block: add proper helpers for elevator_type module refcount management 2022-10-23 18:59:17 -06:00
fops.c block: remove blkdev_writepages 2022-11-16 11:32:53 -07:00
genhd.c block-2023-01-06 2023-01-06 13:12:42 -08:00
holder.c block: don't allow a disk link holder to itself 2022-11-16 15:19:56 -07:00
ioctl.c block: Do not reread partition table on exclusively open device 2022-12-01 07:44:03 -07:00
ioprio.c block: Fix handling of tasks without ioprio in ioprio_get(2) 2022-06-27 06:29:12 -06:00
Kconfig block: Remove "select SRCU" 2023-01-05 08:50:10 -07:00
Kconfig.iosched block: only build the icq tracking code when needed 2021-12-16 10:59:02 -07:00
kyber-iosched.c treewide: Convert del_timer*() to timer_shutdown*() 2022-12-25 13:38:09 -08:00
Makefile blk-cgroup: move blkcg_{get,set}_fc_appid out of line 2022-05-02 14:06:20 -06:00
mq-deadline.c block: mq-deadline: Rename deadline_is_seq_writes() 2022-11-28 19:27:45 -07:00
opal_proto.h block: sed-opal: Add ioctl to return device status 2022-08-22 07:52:51 -06:00
sed-opal.c for-6.2/block-2022-12-08 2022-12-13 10:43:59 -08:00
t10-pi.c block: add pi for extended integrity 2022-03-07 12:48:35 -07:00