Rust build was using two separate workspaces - rust/ and scheds/rust.
There's no reason to separate them and it makes doc generation tricky. Use
single top level workspace so that we can drive all rust building from
cargo.
split build and test jobs to reduce ci turnaround time
and make it clear what is failing when something fails.
also add virtiofsd to deps to make test compilation faster
(most test time is compliation) and remove all force 9ps.
Move included artifacts in the lib section (without this change we can't
publish the crate on crates.io).
Fixes: 082bccb ("fix/enable rust tests, make build faster")
Signed-off-by: Andrea Righi <andrea.righi@linux.dev>
The right options to set the amount of CPUs in vng is `-p`, not `-c`.
Change the command to use the long format `--cpu` and `--memory` for
better clarity.
This fixes issue #625.
Signed-off-by: Andrea Righi <andrea.righi@linux.dev>
This commit fixes rust tests and configures ci to
run them on commit. It also sets up CI to run those
in a timely manner by caching dependencies and splitting jobs.
Simplify scx_rlfifo code, add detailed documentation of the
scx_rustland_core API and get rid of the additional task queue, since it
just makes the code bigger, slower and it doesn't really provide any
benefit (considering that we are dispatching the tasks in FIFO order
anyway).
Signed-off-by: Andrea Righi <andrea.righi@linux.dev>
Introduce some concepts of cache awareness (taken from scx_bpfland).
This change is transparently affecting the BpfScheduler::select_cpu()
API, even if the particular cache topology is not (yet) exposed to the
user-space.
When calling select_cpu() the backend will prioritize idle CPUs that
share the same L2 cache, then the same L3 cache, considering the target
CPU specified in select_cpu() (usually the task's previously used CPU).
Signed-off-by: Andrea Righi <andrea.righi@linux.dev>
Pass the enqueue flags to the user-space scheduler through the
QueuedTask struct.
These flags allow the user-space scheduler to make more informed
scheduling decisions.
Also bump up scx_rustland_core minor version to reflect the new API (we
are not breaking the old API, so we don't need to bump the major version
in this case).
Signed-off-by: Andrea Righi <andrea.righi@linux.dev>
Unexpectedly, little cores, which have relative short time slices, have
more chance to schedule performance-critical tasks. Hence it is better
to keep the time slice same regardless the core types.
Signed-off-by: Changwoo Min <changwoo@igalia.com>
When selecting an idle CPU for a task that has been woken up, prioritize
reusing the same CPU if the waker and wakee share the same L3 cache.
Otherwise, attempt to migrate the wakee to the waker's CPU, provided it
is allowed by the wakee's scheduling domain.
This seems to consistently improve FPS performance when the system is
not operating over its full capacity.
Example:
$ __GL_SYNC_TO_VBLANK=0 vblank_mode=0 glxgears -geometry 800x600
- before: ~18305.77 FPS
- after: ~19060.62 FPS
Signed-off-by: Andrea Righi <andrea.righi@linux.dev>
Rename "turbo domain" to "preferred domain", that conceptually is more
generic and introduce the new option `--preferred-domain CPUMASK`, which
allows users to define the preferred domain, specifying a cpumask as a
hex number. By default ("auto") the scheduler will always try to detect
and use the fastest CPUs in the system.
Moreover, adjust the cpufreq logic to use "auto" both with the
"balance_power" and "balance_performance" EPP profiles.
Then, enable "auto" mode by default: the scheduler will try to
automatically determine the optimal primary domain, preferred domain and
cpufreq level, based on the selected scheduler and energy profiles.
Tested-by: Piotr Gorski < piotr.gorski@cachyos.org >
Signed-off-by: Andrea Righi <andrea.righi@linux.dev>
Fix formatting precision of stats to have lower precision for
readability. The existing formatting is hard to read:
tot= 1538 local=31.27 open_idle= 2.73 affn_viol=23.80 proc=4ms
busy= 1.1 util= 16.6 load= 32.7 fallback_cpu= 6
excl_coll=0.06501950585175553 excl_preempt=0.26007802340702213 excl_idle=0.16384915474642392 excl_wakeup=0.25097529258777634
With this fix stats are far more readable formatting:
tot= 441 local=33.56 open_idle= 0.00 affn_viol=20.63 proc=3ms
busy= 0.4 util= 6.3 load= 33.6 fallback_cpu= 6
excl_coll=0.454 excl_preempt=0.000 excl_idle=0.132 excl_wakeup=0.200
Signed-off-by: Daniel Hodges <hodges.daniel.scott@gmail.com>
Prevent triggering a critical error when a local context for a task
can't be found.
Instead, handle the error gracefully (reporting a warning in debugfs) to
enhance the robustness of the schedulers based on scx_rustland_core.
Signed-off-by: Andrea Righi <andrea.righi@linux.dev>
