Re: Sudden slowdown of ARM emulation in master

[Howard Spoelstra <hsp.cat7@gmail.com>]

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On Wed, Feb 26, 2020 at 10:19 AM Igor Mammedov <imammedo@redhat.com> wrote:

> On Wed, 26 Feb 2020 00:07:55 +0100
> Niek Linnenbank <nieklinnenbank@gmail.com> wrote:
>
> > Hello Igor and Paolo,
>
> does following hack solves issue?
>
> diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c
> index a08ab11f65..ab2448c5aa 100644
> --- a/accel/tcg/translate-all.c
> +++ b/accel/tcg/translate-all.c
> @@ -944,7 +944,7 @@ static inline size_t size_code_gen_buffer(size_t
> tb_size)
>          /* ??? If we relax the requirement that CONFIG_USER_ONLY use the
>             static buffer, we could size this on RESERVED_VA, on the text
>             segment size of the executable, or continue to use the
> default.  */
> -        tb_size = (unsigned long)(ram_size / 4);
> +        tb_size = MAX_CODE_GEN_BUFFER_SIZE;
>  #endif
>      }
>      if (tb_size < MIN_CODE_GEN_BUFFER_SIZE) {
>
>

Nice, for me, that brings qemu-system-ppc back up to speed. (applied to
ppc-for-5.0)

Best,
Howard

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