fuse: support splice() reading from fuse device
in [Kernel]
|
Prev: sched: change nohz idle load balancing logic to push model
Next: Another set of ioctl bkl pushdown, almost the end
From: Matthew Wilcox on 20 May 2010 16:20 On Thu, May 20, 2010 at 10:07:23PM +0200, Miklos Szeredi wrote: > > It says nothing at all, in short. You need to have a real source, and a > > real destination. Not some empty filesystem and /dev/null destination. > > Sure, I will do that. It's just a lot harder to measure the effects > on hardware I have access to, where the CPU speed is just damn too > large compared to I/O speed. Try running a CPU burner on all the cores. Something that's low priority, so it'll be preempted by FUSE, and doesn't consume much cache. -- Matthew Wilcox Intel Open Source Technology Centre "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. We can't possibly take such a retrograde step." -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Miklos Szeredi on 20 May 2010 16:30
On Thu, 20 May 2010, Matthew Wilcox wrote: > On Thu, May 20, 2010 at 10:07:23PM +0200, Miklos Szeredi wrote: > > > It says nothing at all, in short. You need to have a real source, and a > > > real destination. Not some empty filesystem and /dev/null destination. > > > > Sure, I will do that. It's just a lot harder to measure the effects > > on hardware I have access to, where the CPU speed is just damn too > > large compared to I/O speed. > > Try running a CPU burner on all the cores. Something that's low priority, > so it'll be preempted by FUSE, and doesn't consume much cache. Umm, that doesn't really make the CPU any slower, it just makes it consume more power. Miklos -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |