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Message-Id: <20231101225820.51342-1-yury.norov@gmail.com>
Date: Wed, 1 Nov 2023 15:58:16 -0700
From: Yury Norov <yury.norov@...il.com>
To: Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org
Cc: Yury Norov <yury.norov@...il.com>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Rasmus Villemoes <linux@...musvillemoes.dk>
Subject: [PATCH 0/4] lib/group_cpus: rework grp_spread_init_one() and make it O(1)
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
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