Re: Multi-threading article finally "finished" - reviewers welcome

Tech-Archive recommends: Fix windows errors by optimizing your registry

From: William Stacey [MVP] (staceywREMOVE_at_mvps.org)
Date: 06/22/04 

Date: Mon, 21 Jun 2004 23:07:21 -0400

Any good links on this detail? 

-- 
William Stacey, MVP
"Valery Pryamikov" <Valery@nospam.harper.no> wrote in message
news:OnaIcM7VEHA.3596@tk2msftngp13.phx.gbl...
> > - When thread scheduler sees that thread is waiting on Win32
> > synchronization objects it immediately schedules context switch to
another
> > runnable thread instead of wasting time spinning.
>
> shoud read as:
> When thread scheduler sees that thread is waiting on non-signaled Win32
> synchronization objects...
>
> -Valery.
> http://www.harper.no/valery
>
> "Valery Pryamikov" <Valery@nospam.harper.no> wrote in message news:...
> >> AFIK, every primitive is
> >> ultimately based on a spin lock at the lowest level.
> > If we talk about kernel mode Win32 synchronization objects - than it's
not
> > quite so.
> > Yes, spin lock is used by code, but it is different in two ways:
> > - When thread scheduler sees that thread is waiting on Win32
> > synchronization objects it immediately schedules context switch to
another
> > runnable thread instead of wasting time spinning.
> >
> > - Additionally, kernel mode spin lock sets idle bit on interrupt command
> > register (on Intel) or use other means (on other processor types) to
> > notify processor that thread is running idle operation. Interrupt
command
> > register and this bit is not accessible from the user mode.
> >
> >
> > -Valery.
> > http://www.harper.no/valery
> >
>
>

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