Thanks for this. I am a long time Linux user (since about 1994) and use
strace, gdb, tcpdump, etc quite often, especially in an
embedded environment (ie terminal) so am gradually figuring out the plan 9
tools like snoopy. Acid of course is more involved. I’m also trying to
read code as a means
FWIW, I stumbled upon a message, from a Linux user, about the Linux
kernel behaving very similarily to what I see on the AM08PRO with
9front pc64 kernel when not disabling xhci. Quoting (not editing;
almost same behavior as the one I see is at the end of the quote
after "Edit #1:":
---8<---
For ba
Hyperthreading *is* interesting, but the cost is high.
As soon as you have out-of-order execution you've freed instruction decode
from the execution units. And then you start looking for more ways to
increase utilization of those units. Part of it comes from your program's
instruction stream (the
On Wed, Feb 19, 2025 at 12:17:48PM -0800, ron minnich wrote:
> your summary of hyperthreading is basically right. In 2011, the K8/K10 we
> were using did not have hyperthreading.
>
> Most HPC sites, including LANL, where I worked, tended to turn
> hyperthreading off, as it was at best a mixed bles
your summary of hyperthreading is basically right. In 2011, the K8/K10 we
were using did not have hyperthreading.
Most HPC sites, including LANL, where I worked, tended to turn
hyperthreading off, as it was at best a mixed blessing. I note that many
cloud providers have turned it off, for security
Not sure now many new people are here, but if you ever miss things like
strace, just be aware that plan 9 and 9front have alternatives.
I wrote ratrace, long ago, and still find it useful, so that's my goto
tracer; paper here. https://5e.iwp9.org/slides/ratracetalk.pdf
the idea for ratrace came f
