From: Yury Norov <yury.norov@gmail.com>
To: Thomas Gleixner <tglx@linutronix.de>, linux-kernel@vger.kernel.org
Cc: Yury Norov <yury.norov@gmail.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>
Subject: [PATCH 0/4] lib/group_cpus: rework grp_spread_init_one() and make it O(1)
Date: Wed, 1 Nov 2023 15:34:15 -0700 [thread overview]
Message-ID: <20231101223419.49101-1-yury.norov@gmail.com> (raw)
grp_spread_init_one() implementation is sub-optimal now because it
traverses bitmaps from the beginning, instead of picking from the
previous iteration.
Fix it and use find_bit API where appropriate.
Yury Norov (4):
cpumask: introduce for_each_cpu_and_from()
lib/group_cpus: relax atomicity requirement in grp_spread_init_one()
lib/group_cpus: optimize inner loop in grp_spread_init_one()
lib/group_cpus: optimize outer loop in grp_spread_init_one()
include/linux/cpumask.h | 11 +++++++++++
include/linux/find.h | 3 +++
lib/group_cpus.c | 29 ++++++++++++-----------------
3 files changed, 26 insertions(+), 17 deletions(-)
--
2.39.2
next reply other threads:[~2023-11-01 22:34 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-01 22:34 Yury Norov [this message]
2023-11-01 22:58 Yury Norov
2023-12-04 22:01 ` Yury Norov
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