From patchwork Wed Dec 7 16:21:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Robin Jarry X-Patchwork-Id: 120530 X-Patchwork-Delegate: thomas@monjalon.net Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 0434AA00C3; Wed, 7 Dec 2022 17:22:02 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id E732342D27; Wed, 7 Dec 2022 17:21:52 +0100 (CET) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by mails.dpdk.org (Postfix) with ESMTP id A759F42D27 for ; Wed, 7 Dec 2022 17:21:51 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1670430111; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=vZI+7D3cHwhFlAISqyGFq3Urpqpm24+6P90/jDFkQ30=; b=Q7TrvlhRQ6v8WSssCj4PwrTCyAJ+AE+JRezrjI4xQGWHnE2QQEFE8PuDFIZ1EdFHzps1dp T2/aYqb6JABZ8swTJ6n9sIp5WmUaMQLoLWTfxf6Fgh1Rfdg1u/WjecF+NOobIgi5hCFDNT 3zgA3nxksSpbxpCWsy07deqvnCwNUrE= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-627--ezTxxTiNw60rDlj_sn-9w-1; Wed, 07 Dec 2022 11:21:49 -0500 X-MC-Unique: -ezTxxTiNw60rDlj_sn-9w-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 9843D802D2C; Wed, 7 Dec 2022 16:21:48 +0000 (UTC) Received: from ringo.home (unknown [10.39.208.22]) by smtp.corp.redhat.com (Postfix) with ESMTP id BC6ED2166B26; Wed, 7 Dec 2022 16:21:47 +0000 (UTC) From: Robin Jarry To: dev@dpdk.org Cc: Robin Jarry , =?utf-8?q?Morten_Br=C3=B8rup?= Subject: [PATCH 2/4] eal: allow applications to report their cpu usage Date: Wed, 7 Dec 2022 17:21:22 +0100 Message-Id: <20221207162124.769994-3-rjarry@redhat.com> In-Reply-To: <20221207162124.769994-1-rjarry@redhat.com> References: <20221123102612.1688865-1-rjarry@redhat.com> <20221207162124.769994-1-rjarry@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.6 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com 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 Allow applications to register a callback that will be invoked in rte_lcore_dump() and when requesting lcore info in the telemetry API. The callback is expected to return the number of TSC cycles that have passed since application start and the number of these cycles that were spent doing busy work. Signed-off-by: Robin Jarry Acked-by: Morten Brørup --- v3 -> v4: Changed nomenclature: CPU cycles -> TSC cycles lib/eal/common/eal_common_lcore.c | 35 ++++++++++++++++++++++++++++--- lib/eal/include/rte_lcore.h | 29 +++++++++++++++++++++++++ lib/eal/version.map | 1 + 3 files changed, 62 insertions(+), 3 deletions(-) diff --git a/lib/eal/common/eal_common_lcore.c b/lib/eal/common/eal_common_lcore.c index 16548977dce8..23717abf6530 100644 --- a/lib/eal/common/eal_common_lcore.c +++ b/lib/eal/common/eal_common_lcore.c @@ -2,6 +2,7 @@ * Copyright(c) 2010-2014 Intel Corporation */ +#include #include #include @@ -422,11 +423,21 @@ rte_lcore_iterate(rte_lcore_iterate_cb cb, void *arg) return ret; } +static rte_lcore_usage_cb lcore_usage_cb; + +void +rte_lcore_register_usage_cb(rte_lcore_usage_cb cb) +{ + lcore_usage_cb = cb; +} + static int lcore_dump_cb(unsigned int lcore_id, void *arg) { struct rte_config *cfg = rte_eal_get_configuration(); - char cpuset[RTE_CPU_AFFINITY_STR_LEN]; + char cpuset[RTE_CPU_AFFINITY_STR_LEN], usage_str[256]; + uint64_t busy_cycles, total_cycles; + rte_lcore_usage_cb usage_cb; const char *role; FILE *f = arg; int ret; @@ -446,11 +457,20 @@ lcore_dump_cb(unsigned int lcore_id, void *arg) break; } + busy_cycles = 0; + total_cycles = 0; + usage_str[0] = '\0'; + usage_cb = lcore_usage_cb; + if (usage_cb != NULL && usage_cb(lcore_id, &busy_cycles, &total_cycles) == 0) { + snprintf(usage_str, sizeof(usage_str), ", busy cycles %"PRIu64"/%"PRIu64, + busy_cycles, total_cycles); + } ret = eal_thread_dump_affinity(&lcore_config[lcore_id].cpuset, cpuset, sizeof(cpuset)); - fprintf(f, "lcore %u, socket %u, role %s, cpuset %s%s\n", lcore_id, + fprintf(f, "lcore %u, socket %u, role %s, cpuset %s%s%s\n", lcore_id, rte_lcore_to_socket_id(lcore_id), role, cpuset, - ret == 0 ? "" : "..."); + ret == 0 ? "" : "...", usage_str); + return 0; } @@ -489,7 +509,9 @@ lcore_telemetry_info_cb(unsigned int lcore_id, void *arg) { struct lcore_telemetry_info *info = arg; struct rte_config *cfg = rte_eal_get_configuration(); + uint64_t busy_cycles, total_cycles; struct rte_tel_data *cpuset; + rte_lcore_usage_cb usage_cb; const char *role; unsigned int cpu; @@ -522,6 +544,13 @@ lcore_telemetry_info_cb(unsigned int lcore_id, void *arg) if (CPU_ISSET(cpu, &lcore_config[lcore_id].cpuset)) rte_tel_data_add_array_int(cpuset, cpu); rte_tel_data_add_dict_container(info->d, "cpuset", cpuset, 0); + busy_cycles = 0; + total_cycles = 0; + usage_cb = lcore_usage_cb; + if (usage_cb != NULL && usage_cb(lcore_id, &busy_cycles, &total_cycles) == 0) { + rte_tel_data_add_dict_u64(info->d, "busy_cycles", busy_cycles); + rte_tel_data_add_dict_u64(info->d, "total_cycles", total_cycles); + } return 0; } diff --git a/lib/eal/include/rte_lcore.h b/lib/eal/include/rte_lcore.h index 6938c3fd7b81..df7f0a8e07c6 100644 --- a/lib/eal/include/rte_lcore.h +++ b/lib/eal/include/rte_lcore.h @@ -328,6 +328,35 @@ typedef int (*rte_lcore_iterate_cb)(unsigned int lcore_id, void *arg); int rte_lcore_iterate(rte_lcore_iterate_cb cb, void *arg); +/** + * Callback to allow applications to report CPU usage. + * + * @param [in] lcore_id + * The lcore to consider. + * @param [out] busy_cycles + * The amount of busy time since application start, in TSC cycles. + * @param [out] total_cycles + * The total amount of time since application start, in TSC cycles. + * @return + * - 0 if both busy and total were set correctly. + * - a negative value if the information is not available or if any error occurred. + */ +typedef int (*rte_lcore_usage_cb)( + unsigned int lcore_id, uint64_t *busy_cycles, uint64_t *total_cycles); + +/** + * Register a callback from an application to be called in rte_lcore_dump() + * and the /eal/lcore/info telemetry endpoint handler. + * + * Applications are expected to report the amount of busy and total TSC cycles + * since their startup. + * + * @param cb + * The callback function. + */ +__rte_experimental +void rte_lcore_register_usage_cb(rte_lcore_usage_cb cb); + /** * List all lcores. * diff --git a/lib/eal/version.map b/lib/eal/version.map index 7ad12a7dc985..30fd216a12ea 100644 --- a/lib/eal/version.map +++ b/lib/eal/version.map @@ -440,6 +440,7 @@ EXPERIMENTAL { rte_thread_detach; rte_thread_equal; rte_thread_join; + rte_lcore_register_usage_cb; }; INTERNAL {