AndresFreundTec on Nostr: Uh. Huh. Is it expected that SMAP can lead to a noticeable reduction in speed of ...
Uh. Huh. Is it expected that SMAP can lead to a noticeable reduction in speed of copying from kernel to userspace?
It seems to be tied to CPU caches to some degree.
Reading a large, cached, file from the kernel I get substantially higher throughput when aggressively reusing the "target" buffers. But there's very little difference if I boot with clearcpuid=smap.
It seems to be tied to CPU caches to some degree.
Reading a large, cached, file from the kernel I get substantially higher throughput when aggressively reusing the "target" buffers. But there's very little difference if I boot with clearcpuid=smap.