[stgt] [PATCH] use pthread per target

[FUJITA Tomonori]

On Thu, 27 May 2010 18:58:33 +0300
Or Gerlitz <ogerlitz at Voltaire.com> wrote:

> Looking with some more care, I see that your patch adds parallelism
> at the level of iscsi_tcp.c such that still there's one central
> event loop (main) thread and the addition is per iscsi/tcp session
> dedicated thread. In that case, some of my comments are less
> relevant...

Not session (nexus) dedicated thread. The patch creates one pthread
per target. The patch also converts iSCSI/tcp to use it.


> Still I would be happy to learn how you conducted the 500/850 MBs
> test and maybe some comments that you have on my feedback. Also,
> does the patch introduce another per IO context switch?

I set up four targets. Each target has one logical unit (one SSD drive).

I think that the patch would not improve the performance of one target
having four logical units. Can't we tell people to use multiple
targets if they want performance?

I thought about pthread per nexus, pthread per connection, etc. Any
plan to improve the performance without adding hug lock complexity
works for me.
--
To unsubscribe from this list: send the line "unsubscribe stgt" in
the body of a message to majordomo at vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html