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Re: [Qemu-devel] [PATCH] tcg/tci: do not use ldst label (never implement


From: Richard Henderson
Subject: Re: [Qemu-devel] [PATCH] tcg/tci: do not use ldst label (never implemented)
Date: Fri, 22 Sep 2017 08:31:29 -0500
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0

On 09/21/2017 04:59 AM, Thomas Huth wrote:
> $ time ppc64-softmmu/qemu-system-ppc64 -nographic -vga none -prom-env
> 'use-nvramrc?=true' -prom-env 'nvramrc=power-off'
> [...]
> real  0m13.953s
> user  0m13.904s
> sys   0m0.046s
> 
> That's impressive! Richard, may I ask what's the current state of this?
> Do you plan to merge this soon, or are there still issues (like the ones
> that Paolo mentioned)?

I had been assuming that it would go in via the normal ppc tree.
If I should just merge it with tcg-next, I can do so...

> However, I only see that speed-up with the normal x86 backend. I've also
> tried it with TCI, but I hardly saw any improvements there ... is there
> still something missing in the TCI backend that is required for the
> tcg_gen_lookup_and_goto_ptr feature?

Yes.

r~



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