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Re: [Qemu-devel] [PATCH v3 14/20] tcg-arm: Cleanup goto_tb handling


From: Richard Henderson
Subject: Re: [Qemu-devel] [PATCH v3 14/20] tcg-arm: Cleanup goto_tb handling
Date: Fri, 29 Mar 2013 08:06:41 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130311 Thunderbird/17.0.4

On 2013-03-28 23:50, Aurelien Jarno wrote:
On Thu, Mar 28, 2013 at 01:48:42PM -0700, Richard Henderson wrote:
On 2013-03-28 13:09, Aurelien Jarno wrote:
I already proposed such a patch, but it seems to improve things only on
some specific cases (kernel boot), while increasing the I/D cache and
TLB pressure.

See https://lists.gnu.org/archive/html/qemu-devel/2012-10/msg01684.html

Hmm.  I see that your previous attempt didn't also go with a removal of
the 16MB limit on code_gen_buffer.  Given the default is 32MB, I wonder
if the decrease in translation makes enough difference.


My patch also removed the 16MB limit. Note also the default is 1/4th
of the emulated RAM, so it can be a lot bigger than 32MB.

Ok, I guess consider that patch dropped for now then.

I'll post v4 today with the changes suggested so far.


r~



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