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Mon, 29 Jun 2020 05:38:54 +0000 Received: from VE1PR08MB4640.eurprd08.prod.outlook.com ([fe80::c2e:9ccb:a690:6863]) by VE1PR08MB4640.eurprd08.prod.outlook.com ([fe80::c2e:9ccb:a690:6863%6]) with mapi id 15.20.3131.026; Mon, 29 Jun 2020 05:38:54 +0000 From: Phil Yang To: Honnappa Nagarahalli , "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 , Ruifeng Wang , nd , nd Thread-Topic: [PATCH v5 3/4] devtools: prevent use of rte atomic APIs in future patches Thread-Index: AQHWMzxkyHcrVXmuZ0Ov/UcsxewOH6jvN70AgAAQsJA= Date: Mon, 29 Jun 2020 05:38:54 +0000 Message-ID: References: <1589270586-4480-1-git-send-email-phil.yang@arm.com> <1590483667-10318-1-git-send-email-phil.yang@arm.com> <1590483667-10318-4-git-send-email-phil.yang@arm.com> In-Reply-To: Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ts-tracking-id: eb16dede-8e89-4a67-b159-d193a6ba620e.0 x-checkrecipientchecked: true Authentication-Results-Original: arm.com; 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X-MS-Office365-Filtering-Correlation-Id-Prvs: 959d9348-5726-4f06-b7a0-08d81beeb63c X-Forefront-PRVS: 044968D9E1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: yQqPJIgE8DG7Vh/fd6tsoiF7Sw6lKu/jV7744XPye23bjZTLxS41msEpgudGOFpXZ62eXE3AaPV1bpHyzlGLQwOL4p96T0jvqNJ7O1TaRy17e27z51pZ3wpS2rjprnrl/tU+u0yaLLaEgDHZyZmXFhOU1V4lTAMVvSJrt+EQQsFkoUxHqmzYnb8wgNXwt3OPqHhXSpN/rKmpbCmwuKYG18LnPm4wj2xcIOXfo06z/Yy+TtKT9KS117FXRNYcsmBVWRqE3t7by0sUWYk5kq70a97b4ltlgCLYYTuoGkDZBCscWYXyFA8jUoGPkkCOgtt0UlwzJAtA2e+SUVwX6CFFpjlA9QeugVOcMwd5eZMEQkWvlfbNkgflrUJf6KEq7PqoKPzKFth1x7dXZuzaBeFz7d6KLyWr0VeQU0LXzsHGevM= X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Jun 2020 05:39:03.4276 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d22cf520-9c78-4128-a2b2-08d81beebb78 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d; Ip=[63.35.35.123]; Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: DB5EUR03FT021.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR08MB4368 Subject: Re: [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" > -----Original Message----- > From: Honnappa Nagarahalli > Sent: Monday, June 29, 2020 12:38 PM > To: Phil Yang ; 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 > ; Ruifeng Wang ; Phil > Yang ; nd ; Honnappa Nagarahalli > ; nd > Subject: RE: [PATCH v5 3/4] devtools: prevent use of rte atomic APIs in f= uture > patches >=20 > >=20 > > Subject: [PATCH v5 3/4] devtools: prevent use of rte atomic APIs in fut= ure > > patches > > > > In order to deprecate the rte_atomic APIs, prevent the patches from usi= ng > > 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=3D1 > > > > + # refrain from new additions of 16/32/64 bits rte_atomic_xxx() > > + # multiple folders and expressions are separated by spaces > > + awk -v FOLDERS=3D"lib/librte_distributor lib/librte_hash lib/librte_k= ni > > + 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=3D"rte_atomic[0-9][0-9]_.*\\\(" \ > > + -v RET_ON_FAIL=3D1 \ > > + -v MESSAGE=3D'Use of rte_atomicNN_xxx APIs not allowed, > use > > __atomic_xxx APIs' \ > > + -f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \ > > + "$1" || res=3D1 > > + > > + # refrain from using compiler __sync built-ins > > + awk -v FOLDERS=3D"lib drivers app examples" \ > > + -v EXPRESSIONS=3D"__sync_.*\\\(" \ > > + -v RET_ON_FAIL=3D1 \ > > + -v MESSAGE=3D'Use of __sync_xxx built-ins not allowed, use > > __atomic_xxx APIs' \ > > + -f $(dirname $(readlink -f $0))/check-forbidden-tokens.awk \ > > + "$1" || res=3D1 > Can you please add rte_smp_*mb as well? Sure. Will do. Thanks, Phil >=20 > > + > > + # refrain from using compiler > > __atomic_thread_fence(__ATOMIC_SEQ_CST) > > + # It should be avoided on x86 for SMP case. > > + awk -v FOLDERS=3D"lib drivers app examples" \ > > + -v > > EXPRESSIONS=3D"__atomic_thread_fence\\\(__ATOMIC_SEQ_CST" \ > > + -v RET_ON_FAIL=3D1 \ > > + -v MESSAGE=3D'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=3D1 > > + > > # svg figures must be included with wildcard extension > > # because of png conversion for pdf docs > > awk -v FOLDERS=3D'doc' \ > > -- > > 2.7.4