Re: [Qemu-devel] [RFC v3 00/13] Slow-path for atomic instruction translation

[Mark Burton]

<big snip>
To be clear, for a normal user (e.g. they boot linux, they run some apps, 
etc)..., if they use only one core, is it true that they will see no difference 
in performance?
For a ‘normal user’ who does use multi-core, are you saying that a typical boot 
is slower?

Cheers

Mark.

> On 10 Jul 2015, at 10:23, Alvise Rigo <address@hidden> wrote:
> 
> * Performance considerations
> This implementation shows good results while booting a Linux kernel,
> where tons of flushes affect the overall performance. A complete ARM
> Linux boot, without any filesystem, requires 30% longer if compared to
> the mttcg implementation, benefiting however of being capable to offer
> the infrastructure to handle atomic instructions on any architecture.
> Instead compared to the current TCG upstream, it is 40% faster with four
> vCPUs and 2.1 times faster with 8 vCPUs.
> In addition, there is still margin to improve such performance, since at
> the moment TLB is flushed quite often, probably more than the required.


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        mark.burton