Re: [PATCH v2] plugins: optimize cpu_index code generation

[Richard Henderson <richard.henderson@linaro.org>]

On 11/28/24 15:38, Pierrick Bouvier wrote:
> When running with a single vcpu, we can return a constant instead of a
> load when accessing cpu_index.
> A side effect is that all tcg operations using it are optimized, most
> notably scoreboard access.
> When running a simple loop in user-mode, the speedup is around 20%.
> 
> Signed-off-by: Pierrick Bouvier<pierrick.bouvier@linaro.org>
> 
> ---
> 
> v2:
> - no need to do a flush, as user-mode already does it when spawning a
>    second cpu (to honor CF_PARALLEL flags).
> - change condition detection to use CF_PARALLEL instead
> ---
>   accel/tcg/plugin-gen.c | 9 +++++++++
>   1 file changed, 9 insertions(+)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~