[Stgt-devel] sg_turs on stgt iscsi drive is very slow

[FUJITA Tomonori]

From: FUJITA Tomonori <fujita.tomonori at lab.ntt.co.jp>
Subject: Re: [Stgt-devel] sg_turs on stgt iscsi drive is very slow
Date: Thu, 14 Dec 2006 11:41:27 +0900

> From: Ming Zhang <mingz at ele.uri.edu>
> Subject: Re: [Stgt-devel] sg_turs on stgt iscsi drive is very slow
> Date: Tue, 12 Dec 2006 11:13:33 -0500
> 
> > same as yesterday. i think that EPOLL should have problem.
> 
> I did some performance tests. I wrongly use EPOLL_WAIT or EPOLL_WAIT
> is much slower than AIO queue (try r616 if you are interested).
> 
> I'll try kevent in -mm kernel shortly (probably, after 2.6.20-rc1).

Seems that it might takes months to have kevent in mainline. So I
added tweaked the EPOLL_WAIT patch.

The latest patch (aioepoll-2.6.20-rc2.diff), I've just put into the
svn repository, should provide much better performances.