On Mon, Oct 30, 2000 at 11:50:24AM +0100, Ingo Molnar wrote: > > On Mon, 30 Oct 2000, Jeff V. Merkey wrote: > > > ds: and es: are both used in copy-to-user and copy-from-user and they > > get reloaded. > > And they all share the same segment descriptor. Whats your point? ES is > the default target segment for string operations. DS is the default data > segment. Have you ever profiled how many cycles it takes to do a "mov > __KERNEL_DS, %es" in entry.S, before making your (ridiculous) claim? I > have. > No. I used a hardware analyzer to show me how many LOCK# assertions it does invisible to your software tools underneath. Try using EMON to profile, it gives hardware numbers and let's you watch the cache controllers issue non-cacheable memory references to fetch the descriptors. Jeff > Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
- Re: 2.2.18Pre Lan Performanc... Horst von Brand
- Re: 2.2.18Pre Lan Performanc... Richard B. Johnson
- Re: 2.2.18Pre Lan Performanc... Jeff V. Merkey
- Re: 2.2.18Pre Lan Performanc... Ingo Molnar
- Re: 2.2.18Pre Lan Performanc... Jeff V. Merkey
- Re: 2.2.18Pre Lan Performanc... Ingo Molnar
- Re: 2.2.18Pre Lan Performanc... Daniel Phillips
- Re: 2.2.18Pre Lan Performanc... Daniel Phillips
- Re: 2.2.18Pre Lan Performanc... Michael H. Warfield
- Re: 2.2.18Pre Lan Performanc... Ingo Molnar
- Re: 2.2.18Pre Lan Performanc... Jeff V. Merkey
- Re: 2.2.18Pre Lan Performanc... David Woodhouse
- Re: 2.2.18Pre Lan Performanc... Jeff V. Merkey
- Re: 2.2.18Pre Lan Performanc... Roger Larsson
- Re: 2.2.18Pre Lan Performance Ro... Jeff V. Merkey
- Re: 2.2.18Pre Lan Performanc... Andi Kleen
- Re: 2.2.18Pre Lan Performanc... Jeff V. Merkey
- Re: 2.2.18Pre Lan Performanc... Andi Kleen
- Re: 2.2.18Pre Lan Performanc... Alan Cox
- Re: 2.2.18Pre Lan Performanc... Andi Kleen
- Re: 2.2.18Pre Lan Performance Rocks! Reto Baettig