Re: [Qemu-devel] [RFC 00/20] Do away with TB retranslation

[Max Filippov]

On Fri, Sep 4, 2015 at 7:46 PM, Richard Henderson <address@hidden> wrote:
> On 09/04/2015 08:18 AM, Max Filippov wrote:
>> On Wed, Sep 2, 2015 at 5:21 PM, Richard Henderson <address@hidden> wrote:
>>> git://github.com/rth7680/qemu.git tcg-search-2
>>
>> That makes an impressive speedup for native kernel build on xtensa softmmu:
>> down from 1240 minutes to 690.
>>
>
> Yowza.  Is xtensa a hardware or software managed tlb?

It's mixed: it can walk 2-level page tables automatically, but in linux
second level of page tables is handled through exceptions.

> I guess that's a data point for going ahead with this, supposing that I can
> find the mips+sparc bugs I introduced.
>
> I recall xtensa being one of the trivial conversions.  You didn't notice
> anything odd/broken on your target, then?

No, nothing obvious.
I've taken a look at changes to generic code, they look good to me.

-- 
Thanks.
-- Max