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Tue, 06 Aug 2024 15:01:33 -0700 (PDT) Received: from charlie.ba.rivosinc.com ([64.71.180.162]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1ff58f27340sm92578425ad.17.2024.08.06.15.01.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Aug 2024 15:01:32 -0700 (PDT) From: Charlie Jenkins Date: Tue, 06 Aug 2024 15:01:24 -0700 Subject: [PATCH v2 2/2] tools: Optimize ring buffer for riscv Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20240806-optimize_ring_buffer_read_riscv-v2-2-ca7e193ae198@rivosinc.com> References: <20240806-optimize_ring_buffer_read_riscv-v2-0-ca7e193ae198@rivosinc.com> In-Reply-To: <20240806-optimize_ring_buffer_read_riscv-v2-0-ca7e193ae198@rivosinc.com> To: Paul Walmsley , Palmer Dabbelt , Albert Ou , Andrea Parri Cc: linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, Charlie Jenkins X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1722981688; l=988; i=charlie@rivosinc.com; s=20231120; h=from:subject:message-id; bh=JuRtxgHas7qW8HbkyhiDj2rMQVPrQdaqrYeR7vQQjjA=; b=L4G828in6P4VvsPDE9SYnotwcp2IAxWNTSxHkka7w/LXWCcJztnlELCpYajDBeGp0Om7i0Sis YWMQr6+ro6VBGAOmcJ4u/yy+EXWBEh/BiHRKIXXYnUxsgZ5ETVbauth X-Developer-Key: i=charlie@rivosinc.com; a=ed25519; pk=t4RSWpMV1q5lf/NWIeR9z58bcje60/dbtxxmoSfBEcs= Now that the riscv tools tree supports optimized barriers, use them in the ring buffer. Signed-off-by: Charlie Jenkins Reviewed-by: Andrea Parri --- tools/include/linux/ring_buffer.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/include/linux/ring_buffer.h b/tools/include/linux/ring_buffer.h index 6c02617377c2..a74c397359c7 100644 --- a/tools/include/linux/ring_buffer.h +++ b/tools/include/linux/ring_buffer.h @@ -55,7 +55,7 @@ static inline u64 ring_buffer_read_head(struct perf_event_mmap_page *base) * READ_ONCE() + smp_mb() pair. */ #if defined(__x86_64__) || defined(__aarch64__) || defined(__powerpc64__) || \ - defined(__ia64__) || defined(__sparc__) && defined(__arch64__) + defined(__ia64__) || defined(__sparc__) && defined(__arch64__) || defined(__riscv) return smp_load_acquire(&base->data_head); #else u64 head = READ_ONCE(base->data_head); -- 2.34.1