- Add VlThreadingAdvisor class to detect potential threading misconfigurations
- Reads CPU topology on Linux via /sys/devices/system/cpu/ to detect:
- Hyperthreading-enabled systems where threads > physical cores
- Warns users when threading configuration may reduce performance
- Integrates automatically when thread pool is created (threads > 1)
- Respects quiet() flag to suppress output
- Advisory only - does not affect simulation behavior
This provides earlier feedback than verilator_gantt which requires explicit
profiling and post-hoc analysis.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
The 'act' region used to have 2 trigger vectors ('act' and 'pre'), now
it uses a single "extended" trigger vector where the top bits are what
used to be the used bits in the 'pre' trigger vector. Please see the
description above `TriggerKit`. Also move the extra triggers from the
low end to the high end in the trigger vectors.
Removed the VlTriggerVec type, and refactored to use an unpacked array
of 64-bit words instead. This means the trigger vector and its
operations are now the same as for any other unpacked array. The few
special functions required for operating on a trigger vector are now
generated in V3SchedTrigger as regular AstCFunc if needed.
No functional change intended, performance should be the same.
Instead of using the number of processors in the host, use the number of
processors available to the process, respecting cpu affinity
assignments. Without pthreads, fall back and use the number of
processors in the host as before.
This is now applied everywhere so runing `nuamctl -C 0-3 verilator` or
`numactl -C 0-3 Vsim` should behave as if the host has 4 cores (e.g.
like in CI jobs)
Accessing the ports of hier_block instances directly under the current
hier_block (or top level) work just fine (the heir stub .sv has them),
and this can simplify hooking up dotted references into hier blocks:
push part of the reference under the hier block into the hier block, and
wire it to a port, then resolve the rest of the reference to the port of
the instance.
Jose Drowne
Wilson Snyder
Geza Lore
Jakub Wasilewski
Dan Ruelas-Petrisko
Jean-Nicolas Strauss
Jens Yuechao Liu
Pawel Kojma
Paul Swirhun
Todd Strader
Christian Hecken
Igor Zaworski
Matt Stroud