Re: HELP: Is writeq an atomic operation??

Alan Cox
2008-05-03T14:44:11Z

> > I don't have an authoritative answer, but I can say that I coded
> > drivers/infiniband/hw/mthca and .../mlx4 assuming that writeq() is
> > atomic in the sense that you say, and no one has reported any problems.
> >
>
> If you're not under lock you're screwed on a 32-bit platform.

So what cycles does an MMX, SSE or double float store generate on the
bus ?

Alan