Re: I/O scheduler Project

[Sandip Jadhav <jadhavsandip2402@xxxxxxxxx>]

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Hello everyone,

As dragonfly doesn't have deadline scheduler, I was thinking about
implementing the deadline scheduler. will it be useful to have this policy
? does anyone have suggestion


On Sun, Oct 21, 2012 at 4:46 PM, Sandip Jadhav
<jadhavsandip2402@gmail.com>wrote:

> Thank you Chris For you help.
>
>
> On Sun, Oct 21, 2012 at 3:34 PM, Chris Turner <
> c.turner@199technologies.com> wrote:
>
>> On 10/21/12 09:42, Sandip Jadhav wrote:
>>
>>    I am thinking of working on I/O scheduler project which ismentioned
>>>
>> >   on dragonfly's project page.
>>
>> Probably the best references are the following manual pages + source code:
>>
>>   dsched(4), dsched(9), dsched_bfq(4)
>>
>> Main kernel files are in 'sys/kern/dsched'.
>>
>> There is a good post on the bfq scheduler here:
>>
>> http://leaf.dragonflybsd.org/**mailarchive/kernel/2011-08/**msg00008.html<http://leaf.dragonflybsd.org/mailarchive/kernel/2011-08/msg00008.html>
>>
>> There is also a 'fq' scheduler, but it does not have a manual page.
>> A good intro 'project' to get up to speed would maybe be to review
>> this scheduler and write a manual page documenting it - there were also
>> some kernel posts to dig up from when it was being added as well.
>>
>> Speaking of - survey time!
>>
>> Who's using I/O schedulers currently & with what settings??
>>
>> I had turned off my fq config at some time previously in a
>> failed/misguided
>> attempt to isolate some stability problems and haven't got back around to
>> reconfiguring..
>>
>> Cheers,
>>
>> - Chris
>>
>
>
>
> --
> Thanks
> Sandip Jadhav,
>
>
> --When you come to the end of your rope, tie a knot and hang on.
>



-- 
Thanks
Sandip Jadhav,


--When you come to the end of your rope, tie a knot and hang on.

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Hello everyone,<div><br></div><div>As dragonfly doesn&#39;t have deadline s=
cheduler, I was thinking about implementing the deadline scheduler. will it=
 be useful to have this policy ? does anyone have suggestion</div><div clas=
s=3D"gmail_extra">
<br><br><div class=3D"gmail_quote">On Sun, Oct 21, 2012 at 4:46 PM, Sandip =
Jadhav <span dir=3D"ltr">&lt;<a href=3D"mailto:jadhavsandip2402@gmail.com"; =
target=3D"_blank">jadhavsandip2402@gmail.com</a>&gt;</span> wrote:<br><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #cc=
c solid;padding-left:1ex">
Thank you Chris For you help.<div class=3D"HOEnZb"><div class=3D"h5"><br><b=
r><div class=3D"gmail_quote">On Sun, Oct 21, 2012 at 3:34 PM, Chris Turner =
<span dir=3D"ltr">&lt;<a href=3D"mailto:c.turner@199technologies.com"; targe=
t=3D"_blank">c.turner@199technologies.com</a>&gt;</span> wrote:<br>

<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div>On 10/21/12 09:42, Sandip Jadhav wrote:=
<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
=A0 I am thinking of working on I/O scheduler project which ismentioned<br>
</blockquote>
&gt; =A0 on dragonfly&#39;s project page.<br>
<br></div>
Probably the best references are the following manual pages + source code:<=
br>
<br>
=A0 dsched(4), dsched(9), dsched_bfq(4)<br>
<br>
Main kernel files are in &#39;sys/kern/dsched&#39;.<br>
<br>
There is a good post on the bfq scheduler here:<br>
<br>
<a href=3D"http://leaf.dragonflybsd.org/mailarchive/kernel/2011-08/msg00008=
.html" target=3D"_blank">http://leaf.dragonflybsd.org/<u></u>mailarchive/ke=
rnel/2011-08/<u></u>msg00008.html</a><br>
<br>
There is also a &#39;fq&#39; scheduler, but it does not have a manual page.=
<br>
A good intro &#39;project&#39; to get up to speed would maybe be to review<=
br>
this scheduler and write a manual page documenting it - there were also<br>
some kernel posts to dig up from when it was being added as well.<br>
<br>
Speaking of - survey time!<br>
<br>
Who&#39;s using I/O schedulers currently &amp; with what settings??<br>
<br>
I had turned off my fq config at some time previously in a failed/misguided=
<br>
attempt to isolate some stability problems and haven&#39;t got back around =
to<br>
reconfiguring..<br>
<br>
Cheers,<br>
<br>
- Chris<br>
</blockquote></div><br><br clear=3D"all"><br></div></div><div class=3D"HOEn=
Zb"><div class=3D"h5">-- <br>Thanks<br>Sandip Jadhav,<br><br><br>--When you=
 come to the end of your rope, tie a knot and hang on. <br>
</div></div></blockquote></div><br><br clear=3D"all"><div><br></div>-- <br>=
Thanks<br>Sandip Jadhav,<br><br><br>--When you come to the end of your rope=
, tie a knot and hang on. <br>
</div>

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