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| author |   Jens Axboe <axboe@kernel.dk> | 2021-10-09 13:10:39 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-10-18 06:17:35 -0600 |
| commit | 349302da83529539040d2516de1deec1e09f491c (patch) | |
| tree | 3d8049f24e9c7f2c32ef7ae88322d6828d50af59 /include/linux/timerqueue.h | |
| parent | sbitmap: add __sbitmap_queue_get_batch() (diff) | |
block: improve batched tag allocation
Add a blk_mq_get_tags() helper, which uses the new sbitmap API for
allocating a batch of tags all at once. This both simplifies the block
code for batched allocation, and it is also more efficient than just
doing repeated calls into __sbitmap_queue_get().
This reduces the sbitmap overhead in peak runs from ~3% to ~1% and
yields a performanc increase from 6.6M IOPS to 6.8M IOPS for a single
CPU core.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/timerqueue.h')
0 files changed, 0 insertions, 0 deletions