From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 94628A0542; Sat, 24 Sep 2022 09:56:52 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 338AF42C0B; Sat, 24 Sep 2022 09:56:19 +0200 (CEST) Received: from szxga08-in.huawei.com (szxga08-in.huawei.com [45.249.212.255]) by mails.dpdk.org (Postfix) with ESMTP id A806942BD8 for ; Sat, 24 Sep 2022 09:56:11 +0200 (CEST) Received: from dggpeml500024.china.huawei.com (unknown [172.30.72.54]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4MZLnp6lQqz1P6wh; Sat, 24 Sep 2022 15:51:58 +0800 (CST) Received: from localhost.localdomain (10.67.165.24) by dggpeml500024.china.huawei.com (7.185.36.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Sat, 24 Sep 2022 15:56:09 +0800 From: Chengwen Feng To: CC: , , , Subject: [PATCH v3 07/10] memarea: support backup memory mechanism Date: Sat, 24 Sep 2022 07:49:48 +0000 Message-ID: <20220924074951.31814-8-fengchengwen@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220924074951.31814-1-fengchengwen@huawei.com> References: <20220721044648.6817-1-fengchengwen@huawei.com> <20220924074951.31814-1-fengchengwen@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.67.165.24] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To dggpeml500024.china.huawei.com (7.185.36.10) X-CFilter-Loop: Reflected X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org This patch supports backup memory mechanism, the memarea could use another memarea as a backup. Signed-off-by: Chengwen Feng --- doc/guides/prog_guide/memarea_lib.rst | 3 +++ lib/memarea/memarea_private.h | 2 ++ lib/memarea/rte_memarea.c | 22 ++++++++++++++++++++++ lib/memarea/rte_memarea.h | 7 +++++++ 4 files changed, 34 insertions(+) diff --git a/doc/guides/prog_guide/memarea_lib.rst b/doc/guides/prog_guide/memarea_lib.rst index c77012fe44..842d35f77a 100644 --- a/doc/guides/prog_guide/memarea_lib.rst +++ b/doc/guides/prog_guide/memarea_lib.rst @@ -25,6 +25,9 @@ The main features are as follows: * It supports MT-safe as long as it's specified at creation time. +* It provides backup memory mechanism, the memarea could use another memarea + as a backup. + Library API Overview -------------------- diff --git a/lib/memarea/memarea_private.h b/lib/memarea/memarea_private.h index 98406879b9..08735ca81f 100644 --- a/lib/memarea/memarea_private.h +++ b/lib/memarea/memarea_private.h @@ -23,11 +23,13 @@ struct rte_memarea { struct rte_memarea_param init; rte_spinlock_t lock; void *area_addr; + void *top_addr; struct memarea_elem_list elem_list; struct memarea_elem_list free_list; uint64_t alloc_fails; uint64_t refcnt_check_fails; + uint64_t bak_alloc_fails; } __rte_cache_aligned; #endif /* MEMAREA_PRIVATE_H */ diff --git a/lib/memarea/rte_memarea.c b/lib/memarea/rte_memarea.c index b70830d0bb..f45191aa7f 100644 --- a/lib/memarea/rte_memarea.c +++ b/lib/memarea/rte_memarea.c @@ -132,6 +132,7 @@ rte_memarea_create(const struct rte_memarea_param *init) TAILQ_INIT(&ma->elem_list); TAILQ_INIT(&ma->free_list); ma->area_addr = addr; + ma->top_addr = (void *)((uintptr_t)addr + init->total_sz - 1); elem = addr; elem->size = init->total_sz - sizeof(struct memarea_elem); elem->cookie = MEMAREA_FREE_ELEM_COOKIE; @@ -200,6 +201,15 @@ memarea_add_node(struct rte_memarea *ma, struct memarea_elem *elem, size_t need_ elem->size = align_size; } +static inline void * +memarea_alloc_backup(struct rte_memarea *ma, size_t size, uint32_t cookie) +{ + void *ptr = rte_memarea_alloc(ma->init.bak_memarea, size, cookie); + if (unlikely(ptr == NULL)) + ma->bak_alloc_fails++; + return ptr; +} + void * rte_memarea_alloc(struct rte_memarea *ma, size_t size, uint32_t cookie) { @@ -221,6 +231,8 @@ rte_memarea_alloc(struct rte_memarea *ma, size_t size, uint32_t cookie) ptr = (void *)((uintptr_t)elem + sizeof(struct memarea_elem)); break; } + if (ptr == NULL && ma->init.bak_memarea != NULL) + ptr = memarea_alloc_backup(ma, size, cookie); if (unlikely(ptr == NULL)) ma->alloc_fails++; memarea_unlock(ma); @@ -283,6 +295,12 @@ rte_memarea_update_refcnt(struct rte_memarea *ma, void *ptr, int16_t value) return; memarea_lock(ma); + if (ptr < ma->area_addr || ptr > ma->top_addr) { + rte_memarea_update_refcnt(ma->init.bak_memarea, ptr, value); + memarea_unlock(ma); + return; + } + if (unlikely(elem->refcnt <= 0 || elem->refcnt + value < 0)) { RTE_LOG(ERR, MEMAREA, "memarea: %s cookie: 0x%x curr refcnt: %d update refcnt: %d check fail!\n", @@ -373,10 +391,14 @@ rte_memarea_dump(struct rte_memarea *ma, FILE *f, bool dump_all) fprintf(f, " algorithm: %s\n", memarea_alg_name(ma->init.alg)); fprintf(f, " total-size: 0x%zx\n", ma->init.total_sz); fprintf(f, " mt-safe: %s\n", ma->init.mt_safe ? "yes" : "no"); + if (ma->init.bak_memarea) + fprintf(f, " backup-memarea-name: %s\n", ma->init.bak_memarea->init.name); fprintf(f, " total-regions: %u\n", memarea_elem_list_num(ma)); fprintf(f, " total-free-regions: %u\n", memarea_free_list_num(ma)); fprintf(f, " alloc_fails: %" PRIu64 "\n", ma->alloc_fails); fprintf(f, " refcnt_check_fails: %" PRIu64 "\n", ma->refcnt_check_fails); + if (ma->init.bak_memarea) + fprintf(f, " backup_alloc_fails: %" PRIu64 "\n", ma->bak_alloc_fails); if (dump_all) memarea_dump_all(ma, f); memarea_unlock(ma); diff --git a/lib/memarea/rte_memarea.h b/lib/memarea/rte_memarea.h index 10b8229c64..348febab7f 100644 --- a/lib/memarea/rte_memarea.h +++ b/lib/memarea/rte_memarea.h @@ -39,6 +39,9 @@ * specified, all the functions of the memarea API are lock-free, and assume * to not be invoked in parallel on different logical cores to work on the * same memarea. + * - It provides backup memory mechanism, the memarea could use another memarea + * as a backup. It will attempts to allocate object from backup memarea when + * the current memarea failed to allocate. */ #include @@ -105,6 +108,10 @@ struct rte_memarea_param { */ struct rte_memarea *user_memarea; }; + /** Backup memarea, which is used to handle the scenario where the + * current memarea allocation failure. + */ + struct rte_memarea *bak_memarea; }; /** -- 2.17.1