On Thu, Feb 18, 2021 at 8:29 PM Alexander Motin <m...@freebsd.org> wrote:
> The branch main has been updated by mav: > > URL: > https://cgit.FreeBSD.org/src/commit/?id=812c9f48a2b7bccc31b2a6077b299822357832e4 > > commit 812c9f48a2b7bccc31b2a6077b299822357832e4 > Author: Alexander Motin <m...@freebsd.org> > AuthorDate: 2021-02-19 03:07:32 +0000 > Commit: Alexander Motin <m...@freebsd.org> > CommitDate: 2021-02-19 03:29:38 +0000 > > Save context switch per I/O for iSCSI and IOCTL frontends. > > Introduce new CTL core KPI ctl_run(), preprocessing I/Os in the caller > context instead of scheduling another thread just for that. This call > may sleep, that is not acceptable for some frontends like the original > CAM/FC one, but iSCSI already has separate sleepable per-connection RX > threads, and another thread scheduling is mostly just a waste of time. > IOCTL frontend actually waits for the I/O completion in the caller > thread, so the use of another thread for this has even less sense. > > With this change I can measure ~5% IOPS improvement on 4KB iSCSI I/Os > to ZFS. > Cool! That sounds very useful. _______________________________________________ dev-commits-src-main@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/dev-commits-src-main To unsubscribe, send any mail to "dev-commits-src-main-unsubscr...@freebsd.org"
