Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3

[Ingo Molnar]

* Evgeniy Polyakov <johnpol@xxxxxxxxxxx> wrote:

> On Mon, Feb 26, 2007 at 01:51:23PM +0100, Ingo Molnar (mingo@xxxxxxx) wrote:
> > 
> > * Evgeniy Polyakov <johnpol@xxxxxxxxxxx> wrote:
> > 
> > > Even having main dispatcher as epoll/kevent loop, the _whole_ 
> > > threadlet model is absolutely micro-thread in nature and not state 
> > > machine/event.
> > 
> > Evgeniy, i'm not sure how many different ways to tell this to you, but 
> > you are not listening, you are not learning and you are still not 
> > getting it at all.
> > 
> > The scheduler /IS/ a generic work/event queue. And it's pretty damn 
> > fast. No amount of badmouthing will change that basic fact. Not exactly 
> > as fast as a special-purpose queueing system (for all the reasons i 
> > outlined to you, and which you ignored), but it gets pretty damn close 
> > even for the web workload /you/ identified, and offers a user-space 
> > programming model that is about 1000 times more useful than 
> > state-machines.
> 
> Meanwhile on practiceal side:
> via epia kevent/epoll/threadlet:
> 
> client: ab -c500 -n5000 $url
> 
> kevent:		849.72
> epoll:		538.16
> threadlet:
>  gcc ./evserver_epoll_threadlet.c -o ./evserver_epoll_threadlet
>  In file included from ./evserver_epoll_threadlet.c:30:
>  ./threadlet.h: In function âthreadlet_execâ:
>  ./threadlet.h:46: error: can't find a register in class âGENERAL_REGSâ
>  while reloading âasmâ
> 
> That particular asm optimization fails to compile.

it's not really an asm optimization but an API glue. I'm using:

 gcc -O2 -g -Wall -o evserver_epoll_threadlet evserver_epoll_threadlet.c -fomit-frame-pointer

does that work for you?

	Ingo
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