Re: [PATCH-tip 3/3] locking/rwsem: Stop active read lock ASAP

[Davidlohr Bueso]

On Wed, 22 Feb 2017, Waiman Long wrote:

> On a 2-socket 36-core 72-thread x86-64 E5-2699 v3 system, a rwsem
> microbenchmark was run with 36 locking threads (one/core) doing 100k
> reader and writer lock/unlock operations each, the resulting locking
> rates (avg of 3 runs) on a 4.10 kernel were 561.4 Mop/s and 588.8
> Mop/s without and with the patch respectively. That was an increase
> of about 5%.

iirc this patch is a repost, no? If so, did you get a chance to measure
single file access with direct io as dchinner suggested?

Thanks,
Davidlohr