thank all very much :)
Do you mean if we're using 64-bit os, poll equal epoll?

On 12/27/06, Scott Ferguson <[EMAIL PROTECTED]> wrote:
>
> On Dec 26, 2006, at 9:59 AM, Serge Knystautas wrote:
>
> > Steve Z wrote:
> >> Hi
> >>      Sun JRE  nio has supported epoll from JDK5.0_up9,JDK6.0 at
> >> bottom, I wanna know whether it meaned resin support epoll now?
> >> thanks.
> >
> > Resin does not use nio, so how the Sun JVM implements NIO is not
> > significant.
> >
> > This is an interesting read on the matter from when epoll was a new
> > feature: http://www.theserverside.com/discussions/thread.tss?
> > thread_id=26700
>
> Yep.  Threads aren't all that bad, especially on recent operating
> systems.  Remember, that any epoll/nio solution has extra overhead
> associated with detaching/attaching the thread.
>
> A poll/epoll is essentially the same as an operating system block,
> but handled at the user level (and so requires several extra system
> calls).  OS blocks essentially do the exact same thing, but are
> handled by the kernel, which is far more efficient.
>
> The problem at the moment is really 32-bit memory limitations.  Since
> threads take up virtual memory, lots of threads take up lots of
> memory.  In a 64-bit system, that's not an issue.  But we're running
> up to the limits of 32-bit virtual memory with lots of threads.
>
> That issue will go away in the next 3-5 years as we transition to 64-
> bits.  At that point, it would make sense to just stick with lots of
> threads and avoid the epoll issue entirely.
>
> -- Scott
>
> >
> > --
> > Serge Knystautas
> > Lokitech >> software . strategy . design >> http://www.lokitech.com
> > p. 301.656.5501
> > e. [EMAIL PROTECTED]
> >
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-- 
Best Regards!

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