Re: [PATCH 1/2] accel/tcg: Optimize jump cache flush during tlb range flush

[Richard Henderson]

On 1/11/22 3:47 AM, Idan Horowitz wrote:
> +    /*
> +     * If the length is larger than the jump cache size, then it will take
> +     * longer to clear each entry individually than it will to clear it all.
> +     */
> +    if (d.len >= (TARGET_PAGE_SIZE * TB_JMP_CACHE_SIZE)) {
> +        cpu_tb_jmp_cache_clear(cpu);
> +        return;
> +    }
> +
>       for (target_ulong i = 0; i < d.len; i += TARGET_PAGE_SIZE) {
>           tb_flush_jmp_cache(cpu, d.addr + i);
>       }

Hmm.  Valid.  It looks like we could reasonably rewrite tb_flush_jmp_cache to be more 
efficient, by passing down len.  But this is a decent intermediate step.

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

Queued to tcg-next.

r~