From: Vladislav Bolkhovitin <vst-d+Crzxg7Rs0@public.gmane.org>
To: Chris Worley <worleys-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Bart Van Assche
<bart.vanassche-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
scst-devel
<scst-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>,
OpenIB
<general-ZwoEplunGu1OwGhvXhtEPSCwEArCW2h5@public.gmane.org>
Subject: Re: [Scst-devel] [ofa-general] WinOF_2_0_5/SRP initiator: slow reads and eventually hangs
Date: Mon, 14 Sep 2009 22:51:11 +0400 [thread overview]
Message-ID: <4AAE909F.6030202@vlnb.net> (raw)
In-Reply-To: <f3177b9e0909111250w159def51h9b720366e27fa3a7-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
Chris Worley, on 09/11/2009 11:50 PM wrote:
> I've definitely removed the switch/firmware from being the cause.
>
> I'm thinking the reason you can't repeat the test may be latency
> related. We get ~50usecs average latency (on small block sizes),
> which can't be achieved using regular SSD's (and rotating drives are
> nowhere close). Maybe a ramdisk would help repeat the issue.
I think you should try to reproduce the problem with ramdisk or nullio.
By so you will eliminate possible influence of the SSD backend.
Vlad
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next prev parent reply other threads:[~2009-09-14 18:51 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <f3177b9e0908091009x23813cbdq4fbd9ebe6d8e174f@mail.gmail.com>
[not found] ` <f3177b9e0909022108uc826c3ct3db0ae7bfa2c8128@mail.gmail.com>
[not found] ` <4A9FA945.4070408@vlnb.net>
[not found] ` <f3177b9e0909031038s22f0a1bg401629d4208fd82@mail.gmail.com>
[not found] ` <f3177b9e0909031620i10db945ep69ddc36a7044334a@mail.gmail.com>
[not found] ` <e2e108260909060617y13a1ded8jd6686d02521ecb4@mail.gmail.com>
[not found] ` <f3177b9e0909060636k6e293c06la3dfe9f929da4915@mail.gmail.com>
[not found] ` <f3177b9e0909060641i296c7aefp322712f52de9786a@mail.gmail.com>
[not found] ` <4AA4F561.504@vlnb.net>
[not found] ` <f3177b9e0909081529i4dd74faq9a6c5a4783b5ded4@mail.gmail.com>
[not found] ` <f3177b9e0909081529i4dd74faq9a6c5a4783b5ded4-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-09-09 16:38 ` [Scst-devel] [ofa-general] WinOF_2_0_5/SRP initiator: slow reads and eventually hangs Bart Van Assche
[not found] ` <e2e108260909090938x6b72c519teed7dfd280eac804-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-09-11 19:50 ` Chris Worley
[not found] ` <f3177b9e0909111250w159def51h9b720366e27fa3a7-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-09-12 15:24 ` Bart Van Assche
2009-09-14 18:51 ` Vladislav Bolkhovitin [this message]
[not found] ` <4AAE909F.6030202-d+Crzxg7Rs0@public.gmane.org>
2009-09-14 23:03 ` Chris Worley
[not found] ` <f3177b9e0909141603j2dc61663j4c6bbcc0dda631d4-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-09-15 6:10 ` Bart Van Assche
[not found] ` <e2e108260909142310vb353718uea99d50ab638a865-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-09-15 15:50 ` Chris Worley
[not found] ` <f3177b9e0909150850r2d0f5e15id7f4e14b015f68ed-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-09-15 16:43 ` Vladislav Bolkhovitin
2009-09-15 16:53 ` Chris Worley
[not found] ` <f3177b9e0909150953x11d19210mf07cbdcc57928d42-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-09-15 16:57 ` Vladislav Bolkhovitin
2009-09-15 17:01 ` Chris Worley
2009-09-15 17:10 ` Vladislav Bolkhovitin
[not found] ` <4AAFCA77.6050305-d+Crzxg7Rs0@public.gmane.org>
2009-09-15 20:51 ` Chris Worley
[not found] ` <f3177b9e0909151351p12173c78oe01cc8bcca957550-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-09-16 7:03 ` Bart Van Assche
2009-09-16 15:11 ` Chris Worley
2009-09-16 18:15 ` Vladislav Bolkhovitin
[not found] ` <4AB12B40.9050902-d+Crzxg7Rs0@public.gmane.org>
2009-09-16 19:41 ` Chris Worley
[not found] ` <f3177b9e0909161241h89dabdbybaf98edc5b10f735-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-09-17 10:22 ` Bart Van Assche
2009-09-16 6:38 ` Bart Van Assche
2009-09-16 6:42 ` Bart Van Assche
2009-09-15 16:39 ` Vladislav Bolkhovitin
2009-09-15 16:52 ` Chris Worley
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