[BUGFIX/IMPROVEMENT,0/6] block, bfq: first bath of fixes and improvements

Message

Paolo Valente Jan. 22, 2021, 6:19 p.m. UTC

Hi,

about nine months ago, Jan (Kara, SUSE) reported a throughput
regression with BFQ. That was the beginning of a fruitful dev&testing
collaboration, which led to 18 new commits. Part are fixes, part are
actual performance improvements.

Jia Cheng Hu (1):
  block, bfq: set next_rq to waker_bfqq->next_rq in waker injection

Paolo Valente (5):
  block, bfq: use half slice_idle as a threshold to check short ttime
  block, bfq: increase time window for waker detection
  block, bfq: do not raise non-default weights
  block, bfq: avoid spurious switches to soft_rt of interactive queues
  block, bfq: do not expire a queue when it is the only busy one

 block/bfq-iosched.c | 100 +++++++++++++++++++++++++++++++-------------
 1 file changed, 70 insertions(+), 30 deletions(-)

--
2.20.1

Comments

Jens Axboe Jan. 25, 2021, 1:18 a.m. UTC | #1

On 1/22/21 11:19 AM, Paolo Valente wrote:
> Hi,
> 
> about nine months ago, Jan (Kara, SUSE) reported a throughput
> regression with BFQ. That was the beginning of a fruitful dev&testing
> collaboration, which led to 18 new commits. Part are fixes, part are
> actual performance improvements.

Applied, thanks.