Re: [Qemu-devel] [PATCH v6 18/19] target-arm: don't generate WFE/YIELD calls for MTTCG

[Richard Henderson]

On 11/09/2016 03:57 PM, Alex Bennée wrote:
> The WFE and YIELD instructions are really only hints and in TCG's case
> they were useful to move the scheduling on from one vCPU to the next. In
> the parallel context (MTTCG) this just causes an unnecessary cpu_exit
> and contention of the BQL.
>
> Signed-off-by: Alex Bennée <address@hidden>
> ---
>  target-arm/op_helper.c     |  7 +++++++
>  target-arm/translate-a64.c |  8 ++++++--
>  target-arm/translate.c     | 20 ++++++++++++++++----
>  3 files changed, 29 insertions(+), 6 deletions(-)

Reviewed-by: Richard Henderson <address@hidden>


r~