From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id BB41CA04A4; Tue, 26 May 2020 11:02:31 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id A27AB1DA29; Tue, 26 May 2020 11:02:22 +0200 (CEST) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by dpdk.org (Postfix) with ESMTP id 819241DA1D for ; Tue, 26 May 2020 11:02:20 +0200 (CEST) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 12C191FB; Tue, 26 May 2020 02:02:20 -0700 (PDT) Received: from phil-VirtualBox.shanghai.arm.com (phil-VirtualBox.shanghai.arm.com [10.169.109.151]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 12F583F52E; Tue, 26 May 2020 02:02:12 -0700 (PDT) From: Phil Yang To: dev@dpdk.org Cc: mattias.ronnblom@ericsson.com, mb@smartsharesystems.com, stephen@networkplumber.org, thomas@monjalon.net, bruce.richardson@intel.com, ferruh.yigit@intel.com, hemant.agrawal@nxp.com, jerinj@marvell.com, ktraynor@redhat.com, konstantin.ananyev@intel.com, maxime.coquelin@redhat.com, olivier.matz@6wind.com, harry.van.haaren@intel.com, erik.g.carrillo@intel.com, drc@linux.vnet.ibm.com, david.marchand@redhat.com, zhaoyan.chen@intel.com, ola.liljedahl@arm.com, honnappa.nagarahalli@arm.com, ruifeng.wang@arm.com, phil.yang@arm.com, nd@arm.com Date: Tue, 26 May 2020 17:01:06 +0800 Message-Id: <1590483667-10318-4-git-send-email-phil.yang@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1590483667-10318-1-git-send-email-phil.yang@arm.com> References: <1589270586-4480-1-git-send-email-phil.yang@arm.com> <1590483667-10318-1-git-send-email-phil.yang@arm.com> Subject: [dpdk-dev] [PATCH v5 3/4] devtools: prevent use of rte atomic APIs in future patches X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" In order to deprecate the rte_atomic APIs, prevent the patches from using rte_atomic APIs in the converted modules and compilers __sync built-ins in all modules. The converted modules: lib/librte_distributor lib/librte_hash lib/librte_kni lib/librte_lpm lib/librte_rcu lib/librte_ring lib/librte_stack lib/librte_vhost lib/librte_timer lib/librte_ipsec drivers/event/octeontx drivers/event/octeontx2 drivers/event/opdl drivers/net/bnx2x drivers/net/hinic drivers/net/hns3 drivers/net/memif drivers/net/thunderx drivers/net/virtio examples/l2fwd-event On x86 the __atomic_thread_fence(__ATOMIC_SEQ_CST) is quite expensive for SMP case. Flag the new code which use SEQ_CST memory ordering in __atomic_thread_fence API. Signed-off-by: Phil Yang Reviewed-by: Ruifeng Wang Reviewed-by: Honnappa Nagarahalli --- devtools/checkpatches.sh | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/devtools/checkpatches.sh b/devtools/checkpatches.sh index 158087f..5983f05 100755 --- a/devtools/checkpatches.sh +++ b/devtools/checkpatches.sh @@ -69,6 +69,38 @@ check_forbidden_additions() { # -f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \ "$1" || res=1 + # refrain from new additions of 16/32/64 bits rte_atomic_xxx() + # multiple folders and expressions are separated by spaces + awk -v FOLDERS="lib/librte_distributor lib/librte_hash lib/librte_kni + lib/librte_lpm lib/librte_rcu lib/librte_ring + lib/librte_stack lib/librte_vhost drivers/event/octeontx + drivers/event/octeontx2 drivers/event/opdl + drivers/net/bnx2x drivers/net/hinic drivers/net/hns3 + drivers/net/memif drivers/net/thunderx + drivers/net/virtio examples/l2fwd-event" \ + -v EXPRESSIONS="rte_atomic[0-9][0-9]_.*\\\(" \ + -v RET_ON_FAIL=1 \ + -v MESSAGE='Use of rte_atomicNN_xxx APIs not allowed, use __atomic_xxx APIs' \ + -f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \ + "$1" || res=1 + + # refrain from using compiler __sync built-ins + awk -v FOLDERS="lib drivers app examples" \ + -v EXPRESSIONS="__sync_.*\\\(" \ + -v RET_ON_FAIL=1 \ + -v MESSAGE='Use of __sync_xxx built-ins not allowed, use __atomic_xxx APIs' \ + -f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \ + "$1" || res=1 + + # refrain from using compiler __atomic_thread_fence(__ATOMIC_SEQ_CST) + # It should be avoided on x86 for SMP case. + awk -v FOLDERS="lib drivers app examples" \ + -v EXPRESSIONS="__atomic_thread_fence\\\(__ATOMIC_SEQ_CST" \ + -v RET_ON_FAIL=1 \ + -v MESSAGE='Use of __atomic_thread_fence with SEQ_CST ordering is not allowed, use rte_atomic_thread_fence' \ + -f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \ + "$1" || res=1 + # svg figures must be included with wildcard extension # because of png conversion for pdf docs awk -v FOLDERS='doc' \ -- 2.7.4