Pass in the layer spec when determining the layer core growth algo. This
should make it easier to implement layer growth algos that are spec
specific.
Signed-off-by: Daniel Hodges <hodges.daniel.scott@gmail.com>
Using p->scx.slice to evaluate the consumed time slice can be a bit
imprecise, because the sched_ext core implements yielding by setting
p->scx.slice to 0.
When the task's vruntime is evaluated this is considered as the task has
exhausted its entire allocated time slice, even though it voluntarily
released the CPU before the slice fully expired.
To avoid this inaccuracy and prevent penalizing tasks that voluntarily
release the CPU, always evaluate the used time slice based on the
difference in the task's total execution time (p->se.sum_exec_runtime).
This method provides a more precise calculation of vruntime and results
in a fairer task's deadline evaluation.
Signed-off-by: Andrea Righi <andrea.righi@linux.dev>
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>
