Add an executor, similar to `fd_executor`, except driven by io_uring
instead of `PollContext`. This will allow for queueing actions instead
of waiting for 'ready' from poll. This reduces the number of syscalls
and increases the parallelism possible when doing IO.
Change-Id: Ie2e69cb09ee3ab1086ef31d5ebd0169843a8228d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/2227083
Commit-Queue: Dylan Reid <dgreid@chromium.org>
Tested-by: Dylan Reid <dgreid@chromium.org>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
The type of the executor leaked from the cros_async crate. That was fine
until the desire to add a new executor arose. Hide the fd_executor so
that a uring_executor can be substituted on newer kernels.
Change-Id: I8dd309fd47e1b4a6e16da274abbb8431c80474af
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/2182042
Reviewed-by: Stephen Barber <smbarber@chromium.org>
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Tested-by: Dylan Reid <dgreid@chromium.org>
Commit-Queue: Dylan Reid <dgreid@chromium.org>
Some futures-rs combinators call wake directly instead of using
wake_by_ref. This was left out as on oversight because the initial
executor code only used wake_by_ref.
TEST=run tests with the combinators from futures-rs
Change-Id: I8ac06dfd47d34eee493a5b1194d00ef9d7f6bc18
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/2173972
Tested-by: Dylan Reid <dgreid@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Dylan Reid <dgreid@chromium.org>
Reviewed-by: Stephen Barber <smbarber@chromium.org>
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
There is no need to repoll the waker after it is canceled. This was a
copy paste error that was harmless until tested with futures-rs
combinators that re-use wakers aggressively.
Change-Id: Ie84778b96ff6aa2b58bfe61cd96a78786797ad78
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/2173971
Tested-by: Dylan Reid <dgreid@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Dylan Reid <dgreid@chromium.org>
Reviewed-by: Stephen Barber <smbarber@chromium.org>
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
Adding the ability to run one future to completion will allow for
driving the top level future through the executer when only one future
is needed. For example, if a future-rs combinator is used to collect
several sub futures.
TEST=update doc test
cargo test
Change-Id: Idd1121310a3043bb4110853e5e72eef3bd06950e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/2173970
Reviewed-by: Dylan Reid <dgreid@chromium.org>
Tested-by: Dylan Reid <dgreid@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Dylan Reid <dgreid@chromium.org>
Balloon needs six futures to be selected between, allow that with a new
macro.
TEST=added doc test
Change-Id: I6c15ae5e2f6a8dcbbf0e0700e6b64fb5ca459f97
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/2167693
Reviewed-by: Dylan Reid <dgreid@chromium.org>
Tested-by: Dylan Reid <dgreid@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Dylan Reid <dgreid@chromium.org>
Allowing for wakers to be canceled will allow futures that register
wakers properly implement `Drop`. As it is, they won't ever fire but the
saved FD will leak.
TEST=added 'cancel' unit test to fd_executor:
"cargo test cancel" from the cros_async directory.
Change-Id: Iab5bea6aac0cc689392997745f5dcc8c285200d9
Change-Id: I1df1a04897e8d2c5e9c414d84998084607209fb9
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/2164074
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
Commit-Queue: Dylan Reid <dgreid@chromium.org>
Tested-by: Dylan Reid <dgreid@chromium.org>
This crate will house code using the new async/await features to be used
by other parts of crosvm.
Start the crate with a Future executor that runs tasks in a single
thread and allows futures that block on system file descriptors.
Change-Id: If77778ac056210dabbfc6e6e1e63df1c1b904a7f
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1955045
Reviewed-by: Dylan Reid <dgreid@chromium.org>
Tested-by: Dylan Reid <dgreid@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Dylan Reid <dgreid@chromium.org>
