By: Doug S (foo.delete@this.bar.bar), October 3, 2021 10:14 am
Room: Moderated Discussions
Michael S (already5chosen.delete@this.yahoo.com) on October 3, 2021 5:24 am wrote:
> Frankly, I don't care about what's going on in kernel.
> In my performance-critical usage scenarios kernel performance almost never matters.
> My personal feeling is that, apart from FLIH, kernel could be better (simpler
> and more robust, if not faster) with the same eager state saving policy that
> I advocate for user mode. But, obviously, I never did kernel profiling.
Written like someone who deals only in application code that does little I/O and is rarely under any memory pressure. Outside that comfy bubble where top shows 99% of your system's CPU usage in either "user" or "idle" state, the performance of the kernel matters rather a lot!
> Frankly, I don't care about what's going on in kernel.
> In my performance-critical usage scenarios kernel performance almost never matters.
> My personal feeling is that, apart from FLIH, kernel could be better (simpler
> and more robust, if not faster) with the same eager state saving policy that
> I advocate for user mode. But, obviously, I never did kernel profiling.
Written like someone who deals only in application code that does little I/O and is rarely under any memory pressure. Outside that comfy bubble where top shows 99% of your system's CPU usage in either "user" or "idle" state, the performance of the kernel matters rather a lot!
