> The branch main has been updated by mav:
>
> URL:
> https://cgit.FreeBSD.org/src/commit/?id=7d4c444374d53e54ce197138df64bf40c1fb05a3
>
> commit 7d4c444374d53e54ce197138df64bf40c1fb05a3
> Author: Alexander Motin <[email protected]>
> AuthorDate: 2021-02-23 15:58:56 +0000
> Commit: Alexander Motin <[email protected]>
> CommitDate: 2021-02-23 16:03:32 +0000
>
> Bump CTL block backend threads from 14 to 32 per LUN.
>
> This makes random read benchmarks look better on a wide ZFS pools.
> I am not sure where the original value goes from, but it is there
> for too long now.
I would think this should be bounded by the number of cores/threads
in the system. What happens on a 4 thread system with this value?
>
> MFC after: 1 week
> ---
> sys/cam/ctl/ctl_backend_block.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/sys/cam/ctl/ctl_backend_block.c b/sys/cam/ctl/ctl_backend_block.c
> index 7ec8e32f7338..f50e47a2a6c1 100644
> --- a/sys/cam/ctl/ctl_backend_block.c
> +++ b/sys/cam/ctl/ctl_backend_block.c
> @@ -226,7 +226,7 @@ struct ctl_be_block_io {
>
> extern struct ctl_softc *control_softc;
>
> -static int cbb_num_threads = 14;
> +static int cbb_num_threads = 32;
> SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, block, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
> "CAM Target Layer Block Backend");
> SYSCTL_INT(_kern_cam_ctl_block, OID_AUTO, num_threads, CTLFLAG_RWTUN,
>
--
Rod Grimes [email protected]
_______________________________________________
[email protected] mailing list
https://lists.freebsd.org/mailman/listinfo/dev-commits-src-all
To unsubscribe, send any mail to "[email protected]"
