Re: Cost of handling misaligned access

On Thu, 6 Feb 2025 23:34:27 +0000, BGB wrote:

On 2/6/2025 2:36 PM, Terje Mathisen wrote:

Michael S wrote:

On Thu, 6 Feb 2025 17:47:30 +0100
Terje Mathisen <terje.mathisen@tmsw.no> wrote:

>
FWIW: The idea of running a CPU at 4+ GHz seems a bit much (IME, CPUs
tend to run excessively hot at these kinds of clock speeds; 3.2 to 3.6
seemingly more reasonable so that it "doesn't melt", or have thermal
throttling or stability issues).
>

Does the idea of using all 500 HP of your car give you similar
reservations ?!?
Then again CPU heat production is between quadratic and cubic
wrt frequency... it is k×V^2×f and we have to raise the voltage
in order to run at higher frequencies.

>

<snip>

>
>
A smaller pagefile still exists on the SSD, but mostly because Windows
is unhappy if there is no pagefile on 'C'. Don't generally want a
pagefile on an SSD though as it is worse for lifespan (but, it is 8GB,
which Windows accepts; with around 192GB each on the other drives, for ~
400GB of swap space).

I have not had a swap file on C since 1997!
I have a separate SATA drive for swap.
The only times I use the C drive for swap is the initial bootup and
configuration of the system. Afterwards, I install the swap drive,
call it S, and allow the system to sue 95% of it. Unstable when
using 100% of the space available.
I also have OS and applications on C
but all my files are on M or P;
so a reload does not damage any of my work files (just my time)

Not sure how well Windows load-balances swap, apparently not very well
though (when it starts paging, most of the load seems to be on one
drive; better if it could give a more even spread).
>
The SSD seems to get ~ 300 MB/sec.
>
....