[Xen-devel] Re: [PATCH RFC V2 3/5] jump_label: if a key has alre

On 10/06/2011 12:28 PM, Steven Rostedt wrote:
>> (2) Always reserve 5 bytes of space, but if the distance is small enough
>> patch in a 2-byte jump.  That doesn't help with the icache footprint.
> I don't think this one is worth it.

I disagree.  This is what I benchmarked as having a 5% improvement.  If
squashing out the padding helps, then that's a separate optimisation.

    J

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[Xen-devel] Re: [PATCH RFC V2 3/5] jump_label: if a key has already been initialized, don't nop it out, (continued) [Xen-devel] Re: [PATCH RFC V2 3/5] jump_label: if a key has already been initialized, don't nop it out, Jeremy Fitzhardinge [Xen-devel] Re: [PATCH RFC V2 3/5] jump_label: if a key has already been initialized, don't nop it out, Steven Rostedt [Xen-devel] Re: [PATCH RFC V2 3/5] jump_label: if a key has already been initialized, don't nop it out, Steven Rostedt [Xen-devel] Re: [PATCH RFC V2 3/5] jump_label: if a key has already been initialized, don't nop it out, H. Peter Anvin [Xen-devel] Re: [PATCH RFC V2 3/5] jump_label: if a key has already been initialized, don't nop it out, Jason Baron [Xen-devel] Re: [PATCH RFC V2 3/5] jump_label: if a key has already been initialized, don't nop it out, Steven Rostedt [Xen-devel] Re: [PATCH RFC V2 3/5] jump_label: if a key has already been initialized, don't nop it out, Jason Baron [Xen-devel] Re: [PATCH RFC V2 3/5] jump_label: if a key has already been initialized, don't nop it out, Steven Rostedt [Xen-devel] Re: [PATCH RFC V2 3/5] jump_label: if a key has already been initialized, don't nop it out, Richard Henderson [Xen-devel] Re: [PATCH RFC V2 3/5] jump_label: if a key has already been initialized, don't nop it out, Steven Rostedt [Xen-devel] Re: [PATCH RFC V2 3/5] jump_label: if a key has already been initialized, don't nop it out, Jeremy Fitzhardinge <= [Xen-devel] Re: [PATCH RFC V2 3/5] jump_label: if a key has already been initialized, don't nop it out, Steven Rostedt [Xen-devel] Re: [PATCH RFC V2 3/5] jump_label: if a key has already been initialized, don't nop it out, Jeremy Fitzhardinge [Xen-devel] Re: [PATCH RFC V2 3/5] jump_label: if a key has already been initialized, don't nop it out, Steven Rostedt [Xen-devel] [PATCH][RFC] jump_labels/x86: Use either 5 byte or 2 byte jumps, Steven Rostedt [Xen-devel] Re: [PATCH][RFC] jump_labels/x86: Use either 5 byte or 2 byte jumps, Jeremy Fitzhardinge [Xen-devel] Re: [PATCH][RFC] jump_labels/x86: Use either 5 byte or 2 byte jumps, Peter Zijlstra [Xen-devel] Re: [PATCH][RFC] jump_labels/x86: Use either 5 byte or 2 byte jumps, Steven Rostedt [Xen-devel] Re: [PATCH][RFC] jump_labels/x86: Use either 5 byte or 2 byte jumps, Jason Baron [Xen-devel] Re: [PATCH][RFC] jump_labels/x86: Use either 5 byte or 2 byte jumps, Steven Rostedt [Xen-devel] Re: [PATCH][RFC] jump_labels/x86: Use either 5 byte or 2 byte jumps, H. Peter Anvin

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[Xen-devel] Re: [PATCH RFC V2 3/5] jump_label: if a key has already been