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 6749A43E78; Mon, 15 Apr 2024 13:26:12 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 29BB54026C; Mon, 15 Apr 2024 13:26:10 +0200 (CEST) Received: from mail-lj1-f178.google.com (mail-lj1-f178.google.com [209.85.208.178]) by mails.dpdk.org (Postfix) with ESMTP id F09ED400EF for ; Mon, 15 Apr 2024 13:26:07 +0200 (CEST) Received: by mail-lj1-f178.google.com with SMTP id 38308e7fff4ca-2da08b07157so33852831fa.1 for ; Mon, 15 Apr 2024 04:26:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1713180367; x=1713785167; darn=dpdk.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=odv6F42kK+aOw/8T5qxCf2EDRFw4pBskEirr4eD4NKs=; b=KoZUJIjMXDxagmqPzjSYgXdVQdbithsp+uhGsS6jds9RbyF9Z8o1RzpmOSj2K8UZiS JRP0oJ+V/pv75Cmee28jr4147t4wzJrezj81QfO3X8xAU5+Q0+9yJuXQ4aOKI6laPloy 2c8qsNpQUmd/N9L+URqtJbhyuisPHRXyBFLXuW5SmaH0MY5H85j4DE1+VpGcl0Pf4iRX 9NjHivG7AxWRS32LPGs5IAQWjDKcqlIAt0FcAHk7uQq0x4ev3APVZAyhaNDCal0SCekW XaWKwKSd9eJWFcCGSzcINTgdmOeXy0ds46IXLj7Ard2qTSL2SmiGMqPGNT8UtRXAKFjU ErRw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1713180367; x=1713785167; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=odv6F42kK+aOw/8T5qxCf2EDRFw4pBskEirr4eD4NKs=; b=uNdwYyPc2nxvzMiNeJJ8nClAKvmg0ndAqCQYLLtFY8r4aI1iP8AZvJLTLPep6AdIiP PlRmYj4tYkDVgfumsHeDd34mFxHad6KRPQIwIvSec0svbTOQpeIQ+pKlK0jfG8VEdfWp UVDdc0DAAiboY+4ERA4NCjvJJqZDygf6EQGW/vF3OgVdQIsUJ2KRhSzQ6cFl61YaTWab 3VF3UTuBw7sr4+UP9TsucVNMJZir6N7kTuIWgEEa/km6RMq1VJmECh2cpjkRqMBDuhvQ HfopMPxZ7VQsP8l78C/cRYJmsu+TUI7buozNurV+L3xiK0kNG6eTKt3HXl5UViP15KQu IVpQ== X-Gm-Message-State: AOJu0YwNuKYXGBuJGs7pFy63tBMqGwVON5OsMy9OPSwipsWR6pYJ4ZR+ IC0txPk5NikHDfQkYoqIpLa2hfX+BrzAsMZxKTlqXjfH2e+k7X+JOCEbNA== X-Google-Smtp-Source: AGHT+IErcNQ/Sx9sk2/QtxvGigfNCGcqED5APa3Nz4863wQHT3zhXIBfSrnIyyQ7hCT/4BpWvq9Ojw== X-Received: by 2002:a2e:9d03:0:b0:2d8:bda5:c5f5 with SMTP id t3-20020a2e9d03000000b002d8bda5c5f5mr7467530lji.35.1713180366633; Mon, 15 Apr 2024 04:26:06 -0700 (PDT) Received: from dcu.otaknetworks.com ([212.156.37.190]) by smtp.gmail.com with ESMTPSA id h14-20020a1709070b0e00b00a518c69c4e3sm5320495ejl.23.2024.04.15.04.26.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Apr 2024 04:26:06 -0700 (PDT) From: =?UTF-8?q?Abdullah=20=C3=96mer=20Yama=C3=A7?= To: dev@dpdk.org Cc: =?UTF-8?q?Abdullah=20=C3=96mer=20Yama=C3=A7?= Subject: [PATCH v4] lib/hash: add defer queue reclaim API Date: Mon, 15 Apr 2024 11:26:02 +0000 Message-Id: <20240415112602.690972-1-aomeryamac@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 adds a new feature to the hash library to allow the user to reclaim the defer queue. This is useful when the user wants to force reclaim resources that are not being used. This API is only available if the RCU is enabled. Signed-off-by: Abdullah Ömer Yamaç --- app/test/test_hash.c | 97 ++++++++++++++++++++++++++++++++++++++ lib/hash/rte_cuckoo_hash.c | 23 +++++++++ lib/hash/rte_hash.h | 24 ++++++++++ lib/hash/version.map | 7 +++ 4 files changed, 151 insertions(+) diff --git a/app/test/test_hash.c b/app/test/test_hash.c index d586878a22..ebeda8c322 100644 --- a/app/test/test_hash.c +++ b/app/test/test_hash.c @@ -2183,6 +2183,100 @@ test_hash_rcu_qsbr_sync_mode(uint8_t ext_bkt) } +/* + * rte_hash_rcu_qsbr_dq_reclaim unit test. + */ +static int +test_hash_rcu_qsbr_dq_reclaim(void) +{ + size_t sz; + int32_t status; + unsigned int total_entries = 8; + unsigned int freed, pending, available; + uint32_t reclaim_keys[8] = {10, 11, 12, 13, 14, 15, 16, 17}; + struct rte_hash_rcu_config rcu_cfg = {0}; + struct rte_hash_parameters hash_params = { + .name = "test_hash_rcu_qsbr_dq_reclaim", + .entries = total_entries, + .key_len = sizeof(uint32_t), + .hash_func = NULL, + .hash_func_init_val = 0, + .socket_id = 0, + }; + + hash_params.extra_flag = RTE_HASH_EXTRA_FLAGS_RW_CONCURRENCY_LF; + + g_qsv = NULL; + g_handle = NULL; + + printf("\n# Running RCU QSBR DQ mode, reclaim defer queue functional test\n"); + + g_handle = rte_hash_create(&hash_params); + RETURN_IF_ERROR_RCU_QSBR(g_handle == NULL, "Hash creation failed"); + + /* Create RCU QSBR variable */ + sz = rte_rcu_qsbr_get_memsize(RTE_MAX_LCORE); + g_qsv = (struct rte_rcu_qsbr *)rte_zmalloc_socket(NULL, sz, + RTE_CACHE_LINE_SIZE, SOCKET_ID_ANY); + RETURN_IF_ERROR_RCU_QSBR(g_qsv == NULL, + "RCU QSBR variable creation failed"); + + status = rte_rcu_qsbr_init(g_qsv, RTE_MAX_LCORE); + RETURN_IF_ERROR_RCU_QSBR(status != 0, + "RCU QSBR variable initialization failed"); + + rcu_cfg.v = g_qsv; + rcu_cfg.dq_size = total_entries; + rcu_cfg.mode = RTE_HASH_QSBR_MODE_DQ; + + /* Attach RCU QSBR to hash table */ + status = rte_hash_rcu_qsbr_add(g_handle, &rcu_cfg); + RETURN_IF_ERROR_RCU_QSBR(status != 0, + "Attach RCU QSBR to hash table failed"); + + /* Register pseudo reader */ + status = rte_rcu_qsbr_thread_register(g_qsv, 0); + RETURN_IF_ERROR_RCU_QSBR(status != 0, + "RCU QSBR thread registration failed"); + rte_rcu_qsbr_thread_online(g_qsv, 0); + + /* Fill half of the hash table */ + for (size_t i = 0; i < total_entries / 2; i++) + status = rte_hash_add_key(g_handle, &reclaim_keys[i]); + + /* Lookup inserted elements*/ + for (size_t i = 0; i < total_entries / 2; i++) + rte_hash_lookup(g_handle, &reclaim_keys[i]); + + /* Try to put these elements into the defer queue*/ + for (size_t i = 0; i < total_entries / 2; i++) + rte_hash_del_key(g_handle, &reclaim_keys[i]); + + /* Reader quiescent */ + rte_rcu_qsbr_quiescent(g_qsv, 0); + + status = rte_hash_add_key(g_handle, &reclaim_keys[0]); + RETURN_IF_ERROR_RCU_QSBR(status < 0, + "failed to add key (pos[%u]=%d)", 0, + status); + + /* This should be (total_entries / 2) + 1 (last add) */ + unsigned int hash_size = rte_hash_count(g_handle); + + /* Freed size should be (total_entries / 2) */ + rte_hash_rcu_qsbr_dq_reclaim(g_handle, &freed, &pending, &available); + + rte_hash_free(g_handle); + rte_free(g_qsv); + + if (hash_size != (total_entries / 2 + 1) || freed != (total_entries / 2)) { + printf("Failed to reclaim defer queue\n"); + return -1; + } + + return 0; +} + /* * Do all unit and performance tests. */ @@ -2261,6 +2355,9 @@ test_hash(void) if (test_hash_rcu_qsbr_sync_mode(1) < 0) return -1; + if (test_hash_rcu_qsbr_dq_reclaim() < 0) + return -1; + return 0; } diff --git a/lib/hash/rte_cuckoo_hash.c b/lib/hash/rte_cuckoo_hash.c index 9cf94645f6..4a44aadd9a 100644 --- a/lib/hash/rte_cuckoo_hash.c +++ b/lib/hash/rte_cuckoo_hash.c @@ -1588,6 +1588,29 @@ rte_hash_rcu_qsbr_add(struct rte_hash *h, struct rte_hash_rcu_config *cfg) return 0; } +int +rte_hash_rcu_qsbr_dq_reclaim(struct rte_hash *h, unsigned int *freed, + unsigned int *pending, unsigned int *available) +{ + int ret; + + if (h == NULL || h->hash_rcu_cfg == NULL) { + rte_errno = EINVAL; + return 1; + } + + ret = rte_rcu_qsbr_dq_reclaim(h->dq, h->hash_rcu_cfg->max_reclaim_size, + freed, pending, available); + if (ret != 0) { + HASH_LOG(ERR, + "%s: could not reclaim the defer queue in hash table", + __func__); + return 1; + } + + return 0; +} + static inline void remove_entry(const struct rte_hash *h, struct rte_hash_bucket *bkt, unsigned int i) diff --git a/lib/hash/rte_hash.h b/lib/hash/rte_hash.h index 7ecc021111..edfa262aca 100644 --- a/lib/hash/rte_hash.h +++ b/lib/hash/rte_hash.h @@ -674,6 +674,30 @@ rte_hash_iterate(const struct rte_hash *h, const void **key, void **data, uint32 */ int rte_hash_rcu_qsbr_add(struct rte_hash *h, struct rte_hash_rcu_config *cfg); +/** + * Reclaim resources from the defer queue. + * This API reclaim the resources from the defer queue if rcu is enabled. + * + * @param h + * The hash object to reclaim resources. + * @param freed + * Number of resources that were freed. + * @param pending + * Number of resources pending on the defer queue. + * This number might not be accurate if multi-thread safety is configured. + * @param available + * Number of resources that can be added to the defer queue. + * This number might not be accurate if multi-thread safety is configured. + * @return + * On success - 0 + * On error - 1 with error code set in rte_errno. + * Possible rte_errno codes are: + * - EINVAL - invalid pointer + */ +__rte_experimental +int rte_hash_rcu_qsbr_dq_reclaim(struct rte_hash *h, unsigned int *freed, + unsigned int *pending, unsigned int *available); + #ifdef __cplusplus } #endif diff --git a/lib/hash/version.map b/lib/hash/version.map index 6f4bcdb71b..d348dd9196 100644 --- a/lib/hash/version.map +++ b/lib/hash/version.map @@ -53,3 +53,10 @@ INTERNAL { rte_thash_gfni_stub; rte_thash_gfni_bulk_stub; }; + +EXPERIMENTAL { + global: + + # added in 24.07 + rte_hash_rcu_qsbr_dq_reclaim; +}; -- 2.34.1