Re: [PATCH v3 4/6] util/bufferiszero: remove useless prefetches

[Richard Henderson]

On 2/7/24 06:48, Alexander Monakov wrote:
> Use of prefetching in bufferiszero.c is quite questionable:
>
> - prefetches are issued just a few CPU cycles before the corresponding
>    line would be hit by demand loads;
>
> - they are done for simple access patterns, i.e. where hardware
>    prefetchers can perform better;
>
> - they compete for load ports in loops that should be limited by load
>    port throughput rather than ALU throughput.
>
> Signed-off-by: Alexander Monakov<amonakov@ispras.ru>
> Signed-off-by: Mikhail Romanov<mmromanov@ispras.ru>
> ---
>   util/bufferiszero.c | 3 ---
>   1 file changed, 3 deletions(-)

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

r~