Messages in this thread | | | Date | Wed, 02 May 2001 13:55:53 -0700 | From | Fabio Riccardi <> | Subject | Re: X15 alpha release: as fast as TUX but in user space (fwd) |
| |
From my experience system calls are not an issue.
What costs a lot is moving data around, since modern CPUs spend most of their time in memory/bus wait cycles...
- Fabio
Linus Torvalds wrote:
> >I think that applies to all really high-performance servers. > > Note that it is definitely not always true. > > Linux system calls are reasonably light-weight. And sometimes trying to > avoid them ends up beaing _more_ work - because you might have to worry > about synchronization and cache coherency in user mode. > > So the rule should be "avoid _unnecessary_ system calls". > > Linus > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |