From: Boqun Feng <boqun.feng@gmail.com>
To: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>
Cc: "Alice Ryhl" <aliceryhl@google.com>,
"Miguel Ojeda" <ojeda@kernel.org>,
"Alex Gaynor" <alex.gaynor@gmail.com>,
"Wedson Almeida Filho" <wedsonaf@gmail.com>,
"Boqun Feng" <boqun.feng@gmail.com>,
"Gary Guo" <gary@garyguo.net>,
"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
benno.lossin@proton.me,
"Andreas Hindborg" <a.hindborg@samsung.com>,
"John Stultz" <jstultz@google.com>,
"Stephen Boyd" <sboyd@kernel.org>,
"Valentin Obst" <kernel@valentinobst.de>
Subject: [PATCH 0/5] rust: time: Add clock read support
Date: Sun, 24 Mar 2024 15:33:34 -0700 [thread overview]
Message-ID: <20240324223339.971934-1-boqun.feng@gmail.com> (raw)
Hi Thomas,
This is an updated version of:
https://lore.kernel.org/rust-for-linux/Zf2kio8NYG5DEgyY@tardis/
where I'm trying to provide the same functionality of Alice's patch:
https://lore.kernel.org/rust-for-linux/20240322-rust-ktime_ms_delta-v2-1-d98de1f7c282@google.com/
along with the lesson we learned from the previous discussion:
https://lore.kernel.org/rust-for-linux/20230221-gpu-up-time-v1-1-bf8fe74b7f55@asahilina.net/
https://lore.kernel.org/rust-for-linux/20230714-rust-time-v2-1-f5aed84218c4@asahilina.net/
There are three important types or traits (the design was mostly brought
from previous patches):
* Instant type: it's a generic type for timestamps, whose backend is
just ktime_t, but it has a generic type to differentiate clocks.
* Clock trait: to read a clock, one must implement the `now` function,
in this series, only CLOCK_MONOTONIC support is added.
* Duration type: it's a signed 64 bit value which represents the
timedelta, I've considered making it unsigned, but I want the
following code:
d = ts2 - ts1;
ts = ts3 + d;
to work even when ts2 < ts1, but I'm also OK to define it as an
unsigned.
Let me know how you think about this.
Regards,
Boqun
Alice Ryhl (1):
rust: time: Introduce Duration type
Boqun Feng (4):
rust: time: doc: Add missing C header link to jiffies
rust: time: Introduce clock reading framework
rust: time: Support reading CLOCK_MONOTONIC
rust: time: Add Instant::elapsed() for monotonic clocks
rust/kernel/time.rs | 139 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 139 insertions(+)
--
2.44.0
next reply other threads:[~2024-03-24 22:34 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-24 22:33 Boqun Feng [this message]
2024-03-24 22:33 ` [PATCH 1/5] rust: time: doc: Add missing C header link to jiffies Boqun Feng
2024-03-26 16:44 ` Benno Lossin
2024-03-24 22:33 ` [PATCH 2/5] rust: time: Introduce Duration type Boqun Feng
2024-03-26 16:50 ` Benno Lossin
2024-03-26 17:11 ` Boqun Feng
2024-03-26 17:17 ` Boqun Feng
2024-03-27 11:18 ` Benno Lossin
2024-03-24 22:33 ` [PATCH 3/5] rust: time: Introduce clock reading framework Boqun Feng
2024-03-26 17:00 ` Benno Lossin
2024-03-26 19:19 ` Boqun Feng
2024-03-27 12:50 ` Benno Lossin
2024-03-27 17:49 ` Boqun Feng
2024-03-24 22:33 ` [PATCH 4/5] rust: time: Support reading CLOCK_MONOTONIC Boqun Feng
2024-03-26 17:03 ` Benno Lossin
2024-03-26 19:21 ` Boqun Feng
2024-03-24 22:33 ` [PATCH 5/5] rust: time: Add Instant::elapsed() for monotonic clocks Boqun Feng
2024-03-26 17:13 ` Benno Lossin
2024-03-26 18:00 ` Boqun Feng
2024-03-26 18:04 ` Boqun Feng
2024-03-27 1:09 ` Boqun Feng
2024-03-27 11:31 ` Benno Lossin
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