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From: Ruifeng Wang <Ruifeng.Wang@arm.com>
To: David Marchand <david.marchand@redhat.com>
Cc: Bruce Richardson <bruce.richardson@intel.com>,
	Vladimir Medvedkin <vladimir.medvedkin@intel.com>,
	John McNamara <john.mcnamara@intel.com>,
	Marko Kovacevic <marko.kovacevic@intel.com>,
	Ray Kinsella <mdr@ashroe.eu>, Neil Horman <nhorman@tuxdriver.com>,
	dev <dev@dpdk.org>,
	"Ananyev, Konstantin" <konstantin.ananyev@intel.com>,
	Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>,
	nd <nd@arm.com>, nd <nd@arm.com>
Subject: Re: [dpdk-dev] [PATCH v8 1/3] lib/lpm: integrate RCU QSBR
Date: Thu, 9 Jul 2020 14:35:18 +0000
Message-ID: <HE1PR0801MB20258C7D93F08628DFFF7EEA9E640@HE1PR0801MB2025.eurprd08.prod.outlook.com> (raw)
In-Reply-To: <CAJFAV8zKAC3u7MKV3N7bswRK7Qo+sNNTv=jCXSAM=Ns1DB1EGw@mail.gmail.com>


> -----Original Message-----
> From: David Marchand <david.marchand@redhat.com>
> Sent: Thursday, July 9, 2020 7:50 PM
> To: Ruifeng Wang <Ruifeng.Wang@arm.com>
> Cc: Bruce Richardson <bruce.richardson@intel.com>; Vladimir Medvedkin
> <vladimir.medvedkin@intel.com>; John McNamara
> <john.mcnamara@intel.com>; Marko Kovacevic
> <marko.kovacevic@intel.com>; Ray Kinsella <mdr@ashroe.eu>; Neil Horman
> <nhorman@tuxdriver.com>; dev <dev@dpdk.org>; Ananyev, Konstantin
> <konstantin.ananyev@intel.com>; Honnappa Nagarahalli
> <Honnappa.Nagarahalli@arm.com>; nd <nd@arm.com>
> Subject: Re: [dpdk-dev] [PATCH v8 1/3] lib/lpm: integrate RCU QSBR
> 
> Hello Ruifeng,
> 
Hi David,

Thanks for your review and suggestions.

> On Thu, Jul 9, 2020 at 10:03 AM Ruifeng Wang <ruifeng.wang@arm.com>
> wrote:
> > diff --git a/lib/librte_lpm/rte_lpm.c b/lib/librte_lpm/rte_lpm.c index
> > 38ab512a4..4fbf5b6df 100644
> > --- a/lib/librte_lpm/rte_lpm.c
> > +++ b/lib/librte_lpm/rte_lpm.c
> > @@ -1,5 +1,6 @@
> >  /* SPDX-License-Identifier: BSD-3-Clause
> >   * Copyright(c) 2010-2014 Intel Corporation
> > + * Copyright(c) 2020 Arm Limited
> >   */
> >
> >  #include <string.h>
> > @@ -39,6 +40,17 @@ enum valid_flag {
> >         VALID
> >  };
> >
> > +/** @internal LPM structure. */
> > +struct __rte_lpm {
> > +       /* LPM metadata. */
> > +       struct rte_lpm lpm;
> > +
> > +       /* RCU config. */
> > +       struct rte_rcu_qsbr *v;         /* RCU QSBR variable. */
> > +       enum rte_lpm_qsbr_mode rcu_mode;/* Blocking, defer queue. */
> > +       struct rte_rcu_qsbr_dq *dq;     /* RCU QSBR defer queue. */
> > +};
> > +
> >  /* Macro to enable/disable run-time checks. */  #if
> > defined(RTE_LIBRTE_LPM_DEBUG)  #include <rte_debug.h> @@ -122,6
> +134,7
> > @@ rte_lpm_create(const char *name, int socket_id,
> >                 const struct rte_lpm_config *config)  {
> >         char mem_name[RTE_LPM_NAMESIZE];
> > +       struct __rte_lpm *internal_lpm = NULL;
> 
> Nit: internal_lpm does not need to be initialised to NULL.
> 
Agreed.

> 
> >         struct rte_lpm *lpm = NULL;
> >         struct rte_tailq_entry *te;
> >         uint32_t mem_size, rules_size, tbl8s_size; @@ -140,12 +153,6
> > @@ rte_lpm_create(const char *name, int socket_id,
> >
> >         snprintf(mem_name, sizeof(mem_name), "LPM_%s", name);
> >
> > -       /* Determine the amount of memory to allocate. */
> > -       mem_size = sizeof(*lpm);
> > -       rules_size = sizeof(struct rte_lpm_rule) * config->max_rules;
> > -       tbl8s_size = (sizeof(struct rte_lpm_tbl_entry) *
> > -                       RTE_LPM_TBL8_GROUP_NUM_ENTRIES * config-
> >number_tbl8s);
> > -
> >         rte_mcfg_tailq_write_lock();
> >
> >         /* guarantee there's no existing */ @@ -161,6 +168,12 @@
> > rte_lpm_create(const char *name, int socket_id,
> >                 goto exit;
> >         }
> >
> > +       /* Determine the amount of memory to allocate. */
> > +       mem_size = sizeof(*internal_lpm);
> > +       rules_size = sizeof(struct rte_lpm_rule) * config->max_rules;
> > +       tbl8s_size = (sizeof(struct rte_lpm_tbl_entry) *
> > +                       RTE_LPM_TBL8_GROUP_NUM_ENTRIES *
> > + config->number_tbl8s);
> > +
> >         /* allocate tailq entry */
> >         te = rte_zmalloc("LPM_TAILQ_ENTRY", sizeof(*te), 0);
> >         if (te == NULL) {
> > @@ -170,22 +183,23 @@ rte_lpm_create(const char *name, int socket_id,
> >         }
> >
> >         /* Allocate memory to store the LPM data structures. */
> > -       lpm = rte_zmalloc_socket(mem_name, mem_size,
> > +       internal_lpm = rte_zmalloc_socket(mem_name, mem_size,
> >                         RTE_CACHE_LINE_SIZE, socket_id);
> > -       if (lpm == NULL) {
> > +       if (internal_lpm == NULL) {
> >                 RTE_LOG(ERR, LPM, "LPM memory allocation failed\n");
> >                 rte_free(te);
> >                 rte_errno = ENOMEM;
> >                 goto exit;
> >         }
> >
> > +       lpm = &internal_lpm->lpm;
> 
> From this point...
> 
> >         lpm->rules_tbl = rte_zmalloc_socket(NULL,
> >                         (size_t)rules_size, RTE_CACHE_LINE_SIZE,
> > socket_id);
> >
> >         if (lpm->rules_tbl == NULL) {
> >                 RTE_LOG(ERR, LPM, "LPM rules_tbl memory allocation failed\n");
> > -               rte_free(lpm);
> > -               lpm = NULL;
> > +               rte_free(internal_lpm);
> > +               internal_lpm = NULL;
> 
> ... lpm is set to &internal_lpm->lpm and will be returned by jumping to the
> exit label.
> So freeing internal_lpm is necessary, but the lpm variable must be set to
> NULL too.
> 
Yes. lpm will be returned instead of internal_lpm. It must be set to NULL.
Will add this in next version.

> 
> >                 rte_free(te);
> >                 rte_errno = ENOMEM;
> >                 goto exit;
> > @@ -197,8 +211,8 @@ rte_lpm_create(const char *name, int socket_id,
> >         if (lpm->tbl8 == NULL) {
> >                 RTE_LOG(ERR, LPM, "LPM tbl8 memory allocation failed\n");
> >                 rte_free(lpm->rules_tbl);
> > -               rte_free(lpm);
> > -               lpm = NULL;
> > +               rte_free(internal_lpm);
> > +               internal_lpm = NULL;
> 
> Ditto.
> 
Will do.
Thanks.

> 
> >                 rte_free(te);
> >                 rte_errno = ENOMEM;
> >                 goto exit;
> 
> --
> David Marchand


  reply	other threads:[~2020-07-09 14:36 UTC|newest]

Thread overview: 137+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-22  6:34 [dpdk-dev] [RFC PATCH 0/3] RCU integration with LPM library Ruifeng Wang
2019-08-22  6:34 ` [dpdk-dev] [RFC PATCH 1/3] doc/rcu: add RCU integration design details Ruifeng Wang
2019-08-22  6:34 ` [dpdk-dev] [RFC PATCH 2/3] lib/ring: add peek API Ruifeng Wang
2019-08-22  6:34 ` [dpdk-dev] [RFC PATCH 3/3] lib/lpm: integrate RCU QSBR Ruifeng Wang
2019-08-23  1:23   ` Stephen Hemminger
2019-08-26  3:11     ` Ruifeng Wang (Arm Technology China)
2019-08-26  5:32       ` Honnappa Nagarahalli
2019-08-22 15:52 ` [dpdk-dev] [RFC PATCH 0/3] RCU integration with LPM library Honnappa Nagarahalli
2019-09-06  9:45 ` [dpdk-dev] [PATCH v2 0/6] " Ruifeng Wang
2019-09-06  9:45   ` [dpdk-dev] [PATCH v2 1/6] doc/rcu: add RCU integration design details Ruifeng Wang
2019-09-06 19:44     ` Honnappa Nagarahalli
2019-09-06  9:45   ` [dpdk-dev] [PATCH v2 2/6] lib/ring: add peek API Ruifeng Wang
2019-09-06  9:45   ` [dpdk-dev] [PATCH v2 3/6] lib/lpm: integrate RCU QSBR Ruifeng Wang
2019-09-06 19:44     ` Honnappa Nagarahalli
2019-09-18 16:15     ` Medvedkin, Vladimir
2019-09-19  6:17       ` Ruifeng Wang (Arm Technology China)
2019-09-06  9:45   ` [dpdk-dev] [PATCH v2 4/6] app/test: add test case for LPM RCU integration Ruifeng Wang
2019-09-06 19:45     ` Honnappa Nagarahalli
2019-09-06  9:45   ` [dpdk-dev] [PATCH v2 5/6] test/lpm: reset total time Ruifeng Wang
2019-09-18 16:17     ` Medvedkin, Vladimir
2019-09-19  6:22       ` Ruifeng Wang (Arm Technology China)
2019-09-06  9:45   ` [dpdk-dev] [PATCH v2 6/6] test/lpm: add RCU integration performance tests Ruifeng Wang
2019-09-06 19:46     ` Honnappa Nagarahalli
2019-10-01  6:29   ` [dpdk-dev] [PATCH v3 0/3] Add RCU reclamation APIs Honnappa Nagarahalli
2019-10-01  6:29     ` [dpdk-dev] [PATCH v3 1/3] lib/ring: add peek API Honnappa Nagarahalli
2019-10-02 18:42       ` Ananyev, Konstantin
2019-10-03 19:49         ` Honnappa Nagarahalli
2019-10-07  9:01           ` Ananyev, Konstantin
2019-10-09  4:25             ` Honnappa Nagarahalli
2019-10-10 15:09               ` Ananyev, Konstantin
2019-10-11  5:03                 ` Honnappa Nagarahalli
2019-10-11 14:41                   ` Ananyev, Konstantin
2019-10-11 18:28                     ` Honnappa Nagarahalli
2019-10-13 20:09                       ` Ananyev, Konstantin
2019-10-14  4:11                         ` Honnappa Nagarahalli
2019-10-01  6:29     ` [dpdk-dev] [PATCH v3 2/3] lib/rcu: add resource reclamation APIs Honnappa Nagarahalli
2019-10-02 17:39       ` Ananyev, Konstantin
2019-10-03  6:29         ` Honnappa Nagarahalli
2019-10-03 12:26           ` Ananyev, Konstantin
2019-10-04  6:07             ` Honnappa Nagarahalli
2019-10-07 10:46               ` Ananyev, Konstantin
2019-10-13  4:35                 ` Honnappa Nagarahalli
2019-10-02 18:50       ` Ananyev, Konstantin
2019-10-03  6:42         ` Honnappa Nagarahalli
2019-10-03 11:52           ` Ananyev, Konstantin
2019-10-04 19:01       ` Medvedkin, Vladimir
2019-10-07 13:11       ` Medvedkin, Vladimir
2019-10-13  3:02         ` Honnappa Nagarahalli
2019-10-15 16:48           ` Medvedkin, Vladimir
2019-10-18  3:47             ` Honnappa Nagarahalli
2019-10-01  6:29     ` [dpdk-dev] [PATCH v3 3/3] doc/rcu: add RCU integration design details Honnappa Nagarahalli
2020-03-29 20:57     ` [dpdk-dev] [PATCH v3 0/3] Add RCU reclamation APIs Thomas Monjalon
2020-03-30 17:37       ` Honnappa Nagarahalli
2020-04-03 18:41     ` [dpdk-dev] [PATCH v4 0/4] " Honnappa Nagarahalli
2020-04-03 18:41       ` [dpdk-dev] [PATCH v4 1/4] lib/rcu: add resource " Honnappa Nagarahalli
2020-04-07 17:39         ` Ananyev, Konstantin
2020-04-19 23:22           ` Honnappa Nagarahalli
2020-04-20  8:19             ` Ananyev, Konstantin
2020-04-03 18:41       ` [dpdk-dev] [PATCH v4 2/4] test/rcu: test cases for RCU defer queue APIs Honnappa Nagarahalli
2020-04-03 18:41       ` [dpdk-dev] [PATCH v4 3/4] doc/rcu: add RCU integration design details Honnappa Nagarahalli
2020-04-03 18:41       ` [dpdk-dev] [PATCH v4 4/4] lib/rcu: add additional debug logs Honnappa Nagarahalli
2020-04-22  3:30     ` [dpdk-dev] [PATCH v5 0/4] Add RCU reclamation APIs Honnappa Nagarahalli
2020-04-22  3:30       ` [dpdk-dev] [PATCH v5 1/4] lib/rcu: add resource " Honnappa Nagarahalli
2020-04-22  8:36         ` Ananyev, Konstantin
2020-04-22  8:42           ` David Marchand
2020-04-22  8:51             ` David Marchand
2020-04-22  9:26               ` Ananyev, Konstantin
2020-04-22  3:30       ` [dpdk-dev] [PATCH v5 2/4] test/rcu: test cases for RCU defer queue APIs Honnappa Nagarahalli
2020-04-22  8:27         ` Ananyev, Konstantin
2020-04-22  3:30       ` [dpdk-dev] [PATCH v5 3/4] doc/rcu: add RCU integration design details Honnappa Nagarahalli
2020-04-22  3:30       ` [dpdk-dev] [PATCH v5 4/4] lib/rcu: add additional debug logs Honnappa Nagarahalli
2020-04-22  8:25         ` Ananyev, Konstantin
2020-04-22 18:46       ` [dpdk-dev] [PATCH v5 0/4] Add RCU reclamation APIs David Marchand
2019-10-01 18:28   ` [dpdk-dev] [PATCH v3 0/3] RCU integration with LPM library Honnappa Nagarahalli
2019-10-01 18:28     ` [dpdk-dev] [PATCH v3 1/3] lib/lpm: integrate RCU QSBR Honnappa Nagarahalli
2019-10-04 16:05       ` Medvedkin, Vladimir
2019-10-09  3:48         ` Honnappa Nagarahalli
2019-10-07  9:21       ` Ananyev, Konstantin
2019-10-13  4:36         ` Honnappa Nagarahalli
2019-10-15 11:15           ` Ananyev, Konstantin
2019-10-18  3:32             ` Honnappa Nagarahalli
2019-10-01 18:28     ` [dpdk-dev] [PATCH v3 2/3] app/test: add test case for LPM RCU integration Honnappa Nagarahalli
2019-10-01 18:28     ` [dpdk-dev] [PATCH v3 3/3] test/lpm: add RCU integration performance tests Honnappa Nagarahalli
2019-10-02 13:02       ` Aaron Conole
2019-10-03  9:09         ` Bruce Richardson
2020-06-08  5:16   ` [dpdk-dev] [PATCH v4 0/3] RCU integration with LPM library Ruifeng Wang
2020-06-08  5:16     ` [dpdk-dev] [PATCH v4 1/3] lib/lpm: integrate RCU QSBR Ruifeng Wang
2020-06-08 18:46       ` Honnappa Nagarahalli
2020-06-18 17:36         ` Medvedkin, Vladimir
2020-06-18 17:21       ` Medvedkin, Vladimir
2020-06-22  5:46         ` Ruifeng Wang
2020-06-23  4:34           ` Honnappa Nagarahalli
2020-06-08  5:16     ` [dpdk-dev] [PATCH v4 2/3] test/lpm: add LPM RCU integration functional tests Ruifeng Wang
2020-06-08  5:16     ` [dpdk-dev] [PATCH v4 3/3] test/lpm: add RCU integration performance tests Ruifeng Wang
2020-06-29  8:02   ` [dpdk-dev] [PATCH v5 0/3] RCU integration with LPM library Ruifeng Wang
2020-06-29  8:02     ` [dpdk-dev] [PATCH v5 1/3] lib/lpm: integrate RCU QSBR Ruifeng Wang
2020-06-29 11:56       ` David Marchand
2020-06-29 12:55         ` Bruce Richardson
2020-06-30 10:35           ` Kinsella, Ray
2020-07-03  7:43         ` David Marchand
2020-07-04 17:00         ` Ruifeng Wang
2020-06-30 10:33       ` Kinsella, Ray
2020-06-29  8:02     ` [dpdk-dev] [PATCH v5 2/3] test/lpm: add LPM RCU integration functional tests Ruifeng Wang
2020-06-29  8:03     ` [dpdk-dev] [PATCH v5 3/3] test/lpm: add RCU integration performance tests Ruifeng Wang
2020-07-07 14:40   ` [dpdk-dev] [PATCH v6 0/3] RCU integration with LPM library Ruifeng Wang
2020-07-07 14:40     ` [dpdk-dev] [PATCH v6 1/3] lib/lpm: integrate RCU QSBR Ruifeng Wang
2020-07-07 14:40     ` [dpdk-dev] [PATCH v6 2/3] test/lpm: add LPM RCU integration functional tests Ruifeng Wang
2020-07-07 14:40     ` [dpdk-dev] [PATCH v6 3/3] test/lpm: add RCU integration performance tests Ruifeng Wang
2020-07-07 15:15   ` [dpdk-dev] [PATCH v7 0/3] RCU integration with LPM library Ruifeng Wang
2020-07-07 15:15     ` [dpdk-dev] [PATCH v7 1/3] lib/lpm: integrate RCU QSBR Ruifeng Wang
2020-07-08 12:36       ` Medvedkin, Vladimir
2020-07-08 14:30       ` David Marchand
2020-07-08 15:34         ` Ruifeng Wang
2020-07-07 15:15     ` [dpdk-dev] [PATCH v7 2/3] test/lpm: add LPM RCU integration functional tests Ruifeng Wang
2020-07-08 12:37       ` Medvedkin, Vladimir
2020-07-08 14:00         ` Ruifeng Wang
2020-07-07 15:15     ` [dpdk-dev] [PATCH v7 3/3] test/lpm: add RCU integration performance tests Ruifeng Wang
2020-07-08 12:37       ` Medvedkin, Vladimir
2020-07-08 14:07         ` Ruifeng Wang
2020-07-09  8:02   ` [dpdk-dev] [PATCH v8 0/3] RCU integration with LPM library Ruifeng Wang
2020-07-09  8:02     ` [dpdk-dev] [PATCH v8 1/3] lib/lpm: integrate RCU QSBR Ruifeng Wang
2020-07-09 11:49       ` David Marchand
2020-07-09 14:35         ` Ruifeng Wang [this message]
2020-07-09  8:02     ` [dpdk-dev] [PATCH v8 2/3] test/lpm: add LPM RCU integration functional tests Ruifeng Wang
2020-07-09  8:02     ` [dpdk-dev] [PATCH v8 3/3] test/lpm: add RCU integration performance tests Ruifeng Wang
2020-07-09 15:42   ` [dpdk-dev] [PATCH v9 0/3] RCU integration with LPM library Ruifeng Wang
2020-07-09 15:42     ` [dpdk-dev] [PATCH v9 1/3] lib/lpm: integrate RCU QSBR Ruifeng Wang
2020-07-09 15:42     ` [dpdk-dev] [PATCH v9 2/3] test/lpm: add LPM RCU integration functional tests Ruifeng Wang
2020-07-09 15:42     ` [dpdk-dev] [PATCH v9 3/3] test/lpm: add RCU integration performance tests Ruifeng Wang
2020-07-10  2:22   ` [dpdk-dev] [PATCH v10 0/3] RCU integration with LPM library Ruifeng Wang
2020-07-10  2:22     ` [dpdk-dev] [PATCH v10 1/3] lib/lpm: integrate RCU QSBR Ruifeng Wang
2020-07-10  2:29       ` Ruifeng Wang
2020-07-10  2:22     ` [dpdk-dev] [PATCH v10 2/3] test/lpm: add LPM RCU integration functional tests Ruifeng Wang
2020-07-10  2:22     ` [dpdk-dev] [PATCH v10 3/3] test/lpm: add RCU integration performance tests Ruifeng Wang
2020-07-10  2:29       ` Ruifeng Wang
2020-07-10 12:21     ` [dpdk-dev] [PATCH v10 0/3] RCU integration with LPM library David Marchand
2020-07-10 14:34       ` Ruifeng Wang

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