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Re: let's make libpager single-threaded
From: |
Richard Braun |
Subject: |
Re: let's make libpager single-threaded |
Date: |
Fri, 30 May 2014 22:02:17 +0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Fri, May 30, 2014 at 08:15:43PM +0200, Samuel Thibault wrote:
> Justus Winter, le Fri 30 May 2014 09:35:37 +0200, a écrit :
> > Quoting Richard Braun (2014-05-29 19:12:13)
> > > On Thu, May 29, 2014 at 07:04:48PM +0200, Samuel Thibault wrote:
> > > > But precisely: once the only thread gets a data_request, it'll call
> > > > pager_read_page, which will typically call store_read, which will wait
> > > > on the eventual I/O, and no other request will be processed during that
> > > > time, and thus not pipelining the I/O requests.
> > >
> > > Right, I assumed the store interface wasn't synchronous...
> >
> > So we want a fixed number of pager threads?
>
> We can use a fixed number of pager threads, yes. Perhaps just 1 indeed
> currently gives the best performance because the device backends that we
> currently use don't get benefit from piling up requests. But at least
> we keep the infrastructure to pile up requests for when we fix the
> backends.
Agreed.
--
Richard Braun
- Re: let's make libpager single-threaded, (continued)
- Re: let's make libpager single-threaded, Richard Braun, 2014/05/05
- Re: let's make libpager single-threaded, Samuel Thibault, 2014/05/05
- Re: let's make libpager single-threaded, Richard Braun, 2014/05/05
- Re: let's make libpager single-threaded, Samuel Thibault, 2014/05/22
- Re: let's make libpager single-threaded, Richard Braun, 2014/05/27
- Re: let's make libpager single-threaded, Samuel Thibault, 2014/05/29
- Re: let's make libpager single-threaded, Richard Braun, 2014/05/29
- Re: let's make libpager single-threaded, Justus Winter, 2014/05/30
- Re: let's make libpager single-threaded, Richard Braun, 2014/05/30
- Re: let's make libpager single-threaded, Samuel Thibault, 2014/05/30
- Re: let's make libpager single-threaded,
Richard Braun <=