From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jerin Jacob Subject: [PATCH 1/6] eal: change rte pause as architecture specific function Date: Thu, 11 May 2017 15:40:41 +0530 Message-ID: <20170511101046.26456-1-jerin.jacob@caviumnetworks.com> Mime-Version: 1.0 Content-Type: text/plain Cc: thomas@monjalon.net, jianbo.liu@linaro.org, viktorin@rehivetech.com, Jerin Jacob To: dev@dpdk.org Return-path: Received: from NAM03-BY2-obe.outbound.protection.outlook.com (mail-by2nam03on0073.outbound.protection.outlook.com [104.47.42.73]) by dpdk.org (Postfix) with ESMTP id E97DB106A for ; Thu, 11 May 2017 12:11:16 +0200 (CEST) List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Each architecture may have different instructions for optimized and power consumption aware rte_pause() implementation. Signed-off-by: Jerin Jacob --- doc/api/doxy-api-index.md | 3 +- lib/librte_eal/common/Makefile | 2 +- lib/librte_eal/common/include/generic/rte_pause.h | 52 +++++++++++++++++++++++ 3 files changed, 55 insertions(+), 2 deletions(-) create mode 100644 lib/librte_eal/common/include/generic/rte_pause.h diff --git a/doc/api/doxy-api-index.md b/doc/api/doxy-api-index.md index f5f1f199f..a6f3fedd4 100644 --- a/doc/api/doxy-api-index.md +++ b/doc/api/doxy-api-index.md @@ -77,7 +77,8 @@ There are many libraries, so their headers may be grouped by topics: [SIMD] (@ref rte_vect.h), [byte order] (@ref rte_byteorder.h), [CPU flags] (@ref rte_cpuflags.h), - [I/O access] (@ref rte_io.h) + [I/O access] (@ref rte_io.h), + [cpu pause] (@ref rte_pause.h) - **CPU multicore**: [interrupts] (@ref rte_interrupts.h), diff --git a/lib/librte_eal/common/Makefile b/lib/librte_eal/common/Makefile index a5bd1089a..fb1e2aab6 100644 --- a/lib/librte_eal/common/Makefile +++ b/lib/librte_eal/common/Makefile @@ -44,7 +44,7 @@ INC += rte_malloc.h rte_keepalive.h rte_time.h GENERIC_INC := rte_atomic.h rte_byteorder.h rte_cycles.h rte_prefetch.h GENERIC_INC += rte_spinlock.h rte_memcpy.h rte_cpuflags.h rte_rwlock.h -GENERIC_INC += rte_vect.h rte_io.h +GENERIC_INC += rte_vect.h rte_io.h rte_pause.h # defined in mk/arch/$(RTE_ARCH)/rte.vars.mk ARCH_DIR ?= $(RTE_ARCH) diff --git a/lib/librte_eal/common/include/generic/rte_pause.h b/lib/librte_eal/common/include/generic/rte_pause.h new file mode 100644 index 000000000..9625e580c --- /dev/null +++ b/lib/librte_eal/common/include/generic/rte_pause.h @@ -0,0 +1,52 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2017 Cavium. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Cavium nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _RTE_PAUSE_H_ +#define _RTE_PAUSE_H_ + +/** + * @file + * + * CPU pause operation. + * + */ + +/** + * Pause CPU execution for a short while + * + * This call is intended for tight loops which poll a shared resource or wait + * for an event. A short pause within the loop may reduce the power consumption. + */ +static inline void rte_pause(void); + +#endif /* _RTE_PAUSE_H_ */ -- 2.12.2