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([140.113.216.168]) by smtp.gmail.com with ESMTPSA id kk14-20020a170903070e00b001e560db091asm23523013plb.72.2024.05.01.00.16.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 01 May 2024 00:16:52 -0700 (PDT) From: Kuan-Wei Chiu To: akpm@linux-foundation.org, yury.norov@gmail.com Cc: linux@rasmusvillemoes.dk, n26122115@gs.ncku.edu.tw, jserv@ccns.ncku.edu.tw, linux-kernel@vger.kernel.org, Kuan-Wei Chiu Subject: [PATCH v3 0/2] bitops: Optimize fns() for improved performance Date: Wed, 1 May 2024 15:16:45 +0800 Message-Id: <20240501071647.10228-1-visitorckw@gmail.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hello, This patch series optimizes the fns() function by avoiding repeated calls to __ffs(). Additionally, tests for fns() have been added in lib/test_bitops.c. Changes in v3: - Move the benchmark test for fns() to lib/test_bitops.c. - Exclude the overhead of random number generation from the benchmark result. - Change the output to print only a total gross instead of each n in the benchmark result. - Update the commit message in the second patch. Changes in v2: - Add benchmark test for fns() in lib/find_bit_benchmark.c. - Change the loop in fns() by counting down from n to 0. - Add find_bit benchmark result for find_nth_bit in commit message. Link to v2: https://lkml.kernel.org/20240430054912.124237-1-visitorckw@gmail.com Link to v1: https://lkml.kernel.org/20240426035152.956702-1-visitorckw@gmail.com Kuan-Wei Chiu (2): lib/test_bitops: Add benchmark test for fns() bitops: Optimize fns() for improved performance include/linux/bitops.h | 12 +++--------- lib/test_bitops.c | 22 ++++++++++++++++++++++ 2 files changed, 25 insertions(+), 9 deletions(-) -- 2.34.1