From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by dpdk.org (Postfix) with ESMTP id 2070B5320 for ; Thu, 22 Jun 2017 14:12:39 +0200 (CEST) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 22 Jun 2017 05:12:37 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.39,373,1493708400"; d="scan'208";a="1185714947" Received: from fmsmsx104.amr.corp.intel.com ([10.18.124.202]) by fmsmga002.fm.intel.com with ESMTP; 22 Jun 2017 05:12:36 -0700 Received: from fmsmsx113.amr.corp.intel.com (10.18.116.7) by fmsmsx104.amr.corp.intel.com (10.18.124.202) with Microsoft SMTP Server (TLS) id 14.3.319.2; Thu, 22 Jun 2017 05:12:37 -0700 Received: from cdsmsx151.ccr.corp.intel.com (172.17.4.38) by FMSMSX113.amr.corp.intel.com (10.18.116.7) with Microsoft SMTP Server (TLS) id 14.3.319.2; Thu, 22 Jun 2017 05:12:36 -0700 Received: from cdsmsx101.ccr.corp.intel.com ([169.254.1.139]) by CDSMSX151.ccr.corp.intel.com ([169.254.3.232]) with mapi id 14.03.0319.002; Thu, 22 Jun 2017 20:12:34 +0800 From: "Kurakin, Ilia" To: "Ananyev, Konstantin" , "Galanov, Dmitry" CC: "dev@dpdk.org" Thread-Topic: [dpdk-dev] [PATCH] ether: add support for vtune task tracing Thread-Index: AQHS6SAsgie2eKrNH0WbS55EUhOikKIwH1IAgACuxsA= Date: Thu, 22 Jun 2017 12:12:33 +0000 Message-ID: References: <1497892689-27494-1-git-send-email-ilia.kurakin@intel.com> <2601191342CEEE43887BDE71AB9772583FB0BD8E@IRSMSX109.ger.corp.intel.com> In-Reply-To: <2601191342CEEE43887BDE71AB9772583FB0BD8E@IRSMSX109.ger.corp.intel.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [172.17.6.105] Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Subject: Re: [dpdk-dev] [PATCH] ether: add support for vtune task tracing 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: , X-List-Received-Date: Thu, 22 Jun 2017 12:12:40 -0000 Hi Konstantin, Adding Dmitry to this thread Ilia -----Original Message----- From: Ananyev, Konstantin = Sent: Thursday, June 22, 2017 12:42 PM To: Kurakin, Ilia ; dev@dpdk.org Cc: Kurakin, Ilia Subject: RE: [dpdk-dev] [PATCH] ether: add support for vtune task tracing Hi Ilia, > -----Original Message----- > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of = > ilia.kurakin@intel.com > Sent: Monday, June 19, 2017 6:18 PM > To: dev@dpdk.org > Cc: Kurakin, Ilia > Subject: [dpdk-dev] [PATCH] ether: add support for vtune task tracing > = > From: Ilia Kurakin > = > The patch adds tracing of loop iterations that yielded no packets in a = > DPDK application. It is using ITT task API: > https://software.intel.com/en-us/node/544206 > = > We suppose the flow of using this tracing would assume the user has = > ITT lib and header on his machine and re-build DPDK with additional make = parameters: > = > make EXTRA_CFLAGS=3D-I > EXTRA_LDLIBS=3D"-L -littnotify" There are few things that worry me with that patch: 1. We add new config variable and add extra dependency here. Usually we try not to do that without really compelling reason. 2. We pollute rte_ethdev with the code that has nothing to do with it major functionality. That makes me wonder why this vtune data collection has to be done inside r= x_burst() function? Why it can't be done on the application layer, i.e. straight after rx_burs= t() is finished? Something like: n =3D rte_eth_rx_burst(port, queue, ....); itt_rx_collect_data(port, queue,= n, ....); ? Or as alternative, user can install this vtune collection routine as rx cal= lback function. Konstantin > = > Signed-off-by: Ilia Kurakin > --- > config/common_base | 1 + > lib/librte_ether/Makefile | 1 + > lib/librte_ether/rte_eth_itt.h | 69 = > ++++++++++++++++++++++++++++++++++++++++++ > lib/librte_ether/rte_ethdev.c | 7 +++++ = > lib/librte_ether/rte_ethdev.h | 26 ++++++++++++++++ > 5 files changed, 104 insertions(+) > create mode 100644 lib/librte_ether/rte_eth_itt.h > = > diff --git a/config/common_base b/config/common_base index = > f6aafd1..60d8b63 100644 > --- a/config/common_base > +++ b/config/common_base > @@ -135,6 +135,7 @@ CONFIG_RTE_MAX_QUEUES_PER_PORT=3D1024 > CONFIG_RTE_LIBRTE_IEEE1588=3Dn > CONFIG_RTE_ETHDEV_QUEUE_STAT_CNTRS=3D16 > CONFIG_RTE_ETHDEV_RXTX_CALLBACKS=3Dy > +CONFIG_RTE_ETHDEV_TRACE_WASTED_RX_ITERATIONS=3Dn > = > # > # Turn off Tx preparation stage > diff --git a/lib/librte_ether/Makefile b/lib/librte_ether/Makefile = > index 93fdde1..c10153a 100644 > --- a/lib/librte_ether/Makefile > +++ b/lib/librte_ether/Makefile > @@ -56,5 +56,6 @@ SYMLINK-y-include +=3D rte_eth_ctrl.h = > SYMLINK-y-include +=3D rte_dev_info.h SYMLINK-y-include +=3D rte_flow.h = > SYMLINK-y-include +=3D rte_flow_driver.h > +SYMLINK-${CONFIG_RTE_ETHDEV_TRACE_WASTED_RX_ITERATIONS}-include +=3D = > +rte_eth_itt.h > = > include $(RTE_SDK)/mk/rte.lib.mk > diff --git a/lib/librte_ether/rte_eth_itt.h = > b/lib/librte_ether/rte_eth_itt.h new file mode 100644 index = > 0000000..e7984fb > --- /dev/null > +++ b/lib/librte_ether/rte_eth_itt.h > @@ -0,0 +1,69 @@ > +#ifndef _RTE_ETH_ITT_H_ > +#define _RTE_ETH_ITT_H_ > + > +#include > +#include > + > +#define ITT_MAX_NAME_LEN (100) > + > +/** > + * Auxiliary ITT structure belonging to port and using to: > + * - track queue state to determine whether it is wasting loop iterat= ions > + * - begin or end ITT task using task domain and name > + */ > +struct rte_eth_itt_aux_data { > + /** > + * ITT domains for each queue. > + */ > + __itt_domain *wasted_iteration_itt_domains[RTE_MAX_QUEUES_PER_PORT]; > + /** > + * ITT task names for each queue. > + */ > + __itt_string_handle *wasted_iteration_itt_handles[RTE_MAX_QUEUES_PER_PO= RT]; > + /** > + * Flags indicating the queues state. Possible values: > + * 1 - queue is wasting iterations, 0 - otherwise. > + */ > + uint8_t queue_is_wasting_iterations[RTE_MAX_QUEUES_PER_PORT]; > +}; > + > +/** > + * The pool of *rte_eth_itt_aux_data* structures. > + */ > +struct rte_eth_itt_aux_data itt_aux_data[RTE_MAX_ETHPORTS]; > + > +/** > + * Initialization of rte_eth_itt_aux_data for a given port. > + * This function must be invoked when ethernet device is being configure= d. > + * Result will be stored in the global array *itt_aux_data*. > + * > + * @param port_id > + * The port identifier of the Ethernet device. > + * @param port_name > + * The name of the Ethernet device. > + * @param queue_num > + * The number of queues on specified port. > + */ > +static inline void > +rte_eth_init_itt(uint8_t port_id, char *port_name, uint8_t queue_num) { > + uint16_t q_id; > + for (q_id =3D 0; q_id < queue_num; ++q_id) { > + char domain_name[ITT_MAX_NAME_LEN]; > + snprintf(domain_name, sizeof(domain_name), > + "RXBurst.WastedIterations.Port_%s.Queue_%d", > + port_name, q_id); > + itt_aux_data[port_id].wasted_iteration_itt_domains[q_id] > + =3D __itt_domain_create(domain_name); > + > + char task_name[ITT_MAX_NAME_LEN]; > + snprintf(task_name, sizeof(task_name), > + "port id: %d; queue id: %d", > + port_id, q_id); > + itt_aux_data[port_id].wasted_iteration_itt_handles[q_id] > + =3D __itt_string_handle_create(task_name); > + > + itt_aux_data[port_id].queue_is_wasting_iterations[q_id] =3D 0; > + } > +} > + > +#endif > diff --git a/lib/librte_ether/rte_ethdev.c = > b/lib/librte_ether/rte_ethdev.c index 81a45c0..9e5ac01 100644 > --- a/lib/librte_ether/rte_ethdev.c > +++ b/lib/librte_ether/rte_ethdev.c > @@ -818,6 +818,13 @@ rte_eth_dev_configure(uint8_t port_id, uint16_t nb_r= x_q, uint16_t nb_tx_q, > return diag; > } > = > +#ifdef RTE_ETHDEV_TRACE_WASTED_RX_ITERATIONS > + /** > + * See rte_eth_itt.h to find comments on code below. > + */ > + rte_eth_init_itt(port_id, dev->data->name, nb_rx_q); #endif > + > return 0; > } > = > diff --git a/lib/librte_ether/rte_ethdev.h = > b/lib/librte_ether/rte_ethdev.h index f6e6c74..4ba90d2 100644 > --- a/lib/librte_ether/rte_ethdev.h > +++ b/lib/librte_ether/rte_ethdev.h > @@ -186,6 +186,10 @@ extern "C" { > #include "rte_eth_ctrl.h" > #include "rte_dev_info.h" > = > +#ifdef RTE_ETHDEV_TRACE_WASTED_RX_ITERATIONS > +#include "rte_eth_itt.h" > +#endif > + > struct rte_mbuf; > = > /** > @@ -2710,6 +2714,28 @@ rte_eth_rx_burst(uint8_t port_id, uint16_t queue_i= d, > int16_t nb_rx =3D (*dev->rx_pkt_burst)(dev->data->rx_queues[queue_id], > rx_pkts, nb_pkts); > = > +#ifdef RTE_ETHDEV_TRACE_WASTED_RX_ITERATIONS > + /** > + * See rte_eth_itt.h to find comments on code below. > + */ > + if (unlikely(nb_rx =3D=3D 0)) { > + if (!itt_aux_data[port_id].queue_is_wasting_iterations[queue_id]) { > + __itt_task_begin( > + itt_aux_data[port_id].wasted_iteration_itt_domains[queue_id], > + __itt_null, __itt_null, > + itt_aux_data[port_id].wasted_iteration_itt_handles[queue_id]); > + itt_aux_data[port_id].queue_is_wasting_iterations[queue_id] =3D 1; > + } > + } > + else { > + if (unlikely(itt_aux_data[port_id].queue_is_wasting_iterations[queue_i= d])) { > + __itt_task_end( > + itt_aux_data[port_id].wasted_iteration_itt_domains[queue_id]); > + itt_aux_data[port_id].queue_is_wasting_iterations[queue_id] =3D 0; > + } > + } > +#endif > + > #ifdef RTE_ETHDEV_RXTX_CALLBACKS > struct rte_eth_rxtx_callback *cb =3D dev->post_rx_burst_cbs[queue_id]; > = > -- > 2.7.4 > = > = > -------------------------------------------------------------------- > Joint Stock Company Intel A/O > Registered legal address: Krylatsky Hills Business Park, > 17 Krylatskaya Str., Bldg 4, Moscow 121614, Russian Federation > = > This e-mail and any attachments may contain confidential material for = > the sole use of the intended recipient(s). Any review or distribution = > by others is strictly prohibited. If you are not the intended = > recipient, please contact the sender and delete all copies. -------------------------------------------------------------------- Joint Stock Company Intel A/O Registered legal address: Krylatsky Hills Business Park, 17 Krylatskaya Str., Bldg 4, Moscow 121614, Russian Federation This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies.