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 8CAE2A0540; Mon, 13 Jul 2020 08:24:18 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 4ABB91D154; Mon, 13 Jul 2020 08:24:13 +0200 (CEST) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by dpdk.org (Postfix) with ESMTP id A6DCD1C1BB for ; Mon, 13 Jul 2020 08:24:12 +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 321621FB; Sun, 12 Jul 2020 23:24:12 -0700 (PDT) Received: from phil-VirtualBox.shanghai.arm.com (phil-VirtualBox.shanghai.arm.com [10.169.108.144]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 7E2C33F887; Sun, 12 Jul 2020 23:24:08 -0700 (PDT) From: Phil Yang To: thomas@monjalon.net, john.mcnamara@intel.com, Honnappa.Nagarahalli@arm.com, drc@linux.vnet.ibm.com, dev@dpdk.org Cc: david.marchand@redhat.com, jerinj@marvell.com, konstantin.ananyev@intel.com, Ola.Liljedahl@arm.com, bruce.richardson@intel.com, Ruifeng.Wang@arm.com, nd@arm.com Date: Mon, 13 Jul 2020 14:23:41 +0800 Message-Id: <1594621423-14796-3-git-send-email-phil.yang@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1594621423-14796-1-git-send-email-phil.yang@arm.com> References: <1594115449-13750-1-git-send-email-phil.yang@arm.com> <1594621423-14796-1-git-send-email-phil.yang@arm.com> Subject: [dpdk-dev] [PATCH v7 2/3] 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 and rte_smp barrier APIs, prevent the patches from using these 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 __atomic_thread_fence API. Signed-off-by: Phil Yang Reviewed-by: Ruifeng Wang --- devtools/checkpatches.sh | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/devtools/checkpatches.sh b/devtools/checkpatches.sh index 58021aa..6d0452f 100755 --- a/devtools/checkpatches.sh +++ b/devtools/checkpatches.sh @@ -51,6 +51,13 @@ print_usage () { check_forbidden_additions() { # res=0 + c11_atomics_dir="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" # refrain from new additions of rte_panic() and rte_exit() # multiple folders and expressions are separated by spaces @@ -74,6 +81,39 @@ check_forbidden_additions() { # -v EXPRESSIONS='for[[:space:]]*\\((char|u?int|unsigned|s?size_t)' \ -v RET_ON_FAIL=1 \ -v MESSAGE='Declaring a variable inside for()' \ + + # refrain from new additions of 16/32/64 bits rte_atomic_xxx() + # multiple folders and expressions are separated by spaces + awk -v FOLDERS="$c11_atomics_dir" \ + -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 built-ins' \ + -f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \ + "$1" || res=1 + + # refrain from new additions of rte_smp_XXmb() + # multiple folders and expressions are separated by spaces + awk -v FOLDERS="$c11_atomics_dir" \ + -v EXPRESSIONS="rte_smp_(r|w)?mb\\\(" \ + -v RET_ON_FAIL=1 \ + -v MESSAGE='Use of rte_smp_r/wmb not allowed, use __atomic_xxx built-ins' \ + -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 built-ins' \ + -f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \ + "$1" || res=1 + + # refrain from using compiler __atomic_thread_fence() + # It should be avoided on x86 for SMP case. + awk -v FOLDERS="lib drivers app examples" \ + -v EXPRESSIONS="__atomic_thread_fence\\\(" \ + -v RET_ON_FAIL=1 \ + -v MESSAGE='The __atomic_thread_fence is not allowed, use rte_atomic_thread_fence' \ -f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \ "$1" || res=1 -- 2.7.4