From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <dev-bounces@dpdk.org>
Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124])
	by inbox.dpdk.org (Postfix) with ESMTP id 6057A45777;
	Fri,  9 Aug 2024 11:59:47 +0200 (CEST)
Received: from mails.dpdk.org (localhost [127.0.0.1])
	by mails.dpdk.org (Postfix) with ESMTP id 51435402C4;
	Fri,  9 Aug 2024 11:59:47 +0200 (CEST)
Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187])
 by mails.dpdk.org (Postfix) with ESMTP id 987ED402A5
 for <dev@dpdk.org>; Fri,  9 Aug 2024 11:59:45 +0200 (CEST)
Received: from mail.maildlp.com (unknown [172.19.88.194])
 by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4WgKBc4NM9zyP07;
 Fri,  9 Aug 2024 17:59:20 +0800 (CST)
Received: from kwepemm600004.china.huawei.com (unknown [7.193.23.242])
 by mail.maildlp.com (Postfix) with ESMTPS id 04ED414022D;
 Fri,  9 Aug 2024 17:59:44 +0800 (CST)
Received: from localhost.localdomain (10.28.79.22) by
 kwepemm600004.china.huawei.com (7.193.23.242) with Microsoft SMTP Server
 (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id
 15.1.2507.39; Fri, 9 Aug 2024 17:59:43 +0800
From: Huisong Li <lihuisong@huawei.com>
To: <dev@dpdk.org>
CC: <mb@smartsharesystems.com>, <thomas@monjalon.net>, <ferruh.yigit@amd.com>, 
 <anatoly.burakov@intel.com>, <david.hunt@intel.com>,
 <sivaprasad.tummala@amd.com>, <stephen@networkplumber.org>,
 <david.marchand@redhat.com>, <liuyonglong@huawei.com>, <lihuisong@huawei.com>
Subject: [PATCH v9 2/2] examples/l3fwd-power: add PM QoS configuration
Date: Fri, 9 Aug 2024 17:50:12 +0800
Message-ID: <20240809095012.16717-3-lihuisong@huawei.com>
X-Mailer: git-send-email 2.22.0
In-Reply-To: <20240809095012.16717-1-lihuisong@huawei.com>
References: <20240320105529.5626-1-lihuisong@huawei.com>
 <20240809095012.16717-1-lihuisong@huawei.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 8bit
X-Originating-IP: [10.28.79.22]
X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To
 kwepemm600004.china.huawei.com (7.193.23.242)
X-BeenThere: dev@dpdk.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: DPDK patches and discussions <dev.dpdk.org>
List-Unsubscribe: <https://mails.dpdk.org/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://mails.dpdk.org/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <https://mails.dpdk.org/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
Errors-To: dev-bounces@dpdk.org

Add PM QoS configuration to declease the delay after sleep in case of
entering deeper idle state.

Signed-off-by: Huisong Li <lihuisong@huawei.com>
Acked-by: Morten Brørup <mb@smartsharesystems.com>
---
 examples/l3fwd-power/main.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/examples/l3fwd-power/main.c b/examples/l3fwd-power/main.c
index 2bb6b092c3..9b386c3710 100644
--- a/examples/l3fwd-power/main.c
+++ b/examples/l3fwd-power/main.c
@@ -47,6 +47,7 @@
 #include <rte_telemetry.h>
 #include <rte_power_pmd_mgmt.h>
 #include <rte_power_uncore.h>
+#include <rte_power_qos.h>
 
 #include "perf_core.h"
 #include "main.h"
@@ -2260,6 +2261,22 @@ init_power_library(void)
 			return -1;
 		}
 	}
+
+	RTE_LCORE_FOREACH(lcore_id) {
+		/*
+		 * Set the worker lcore's to have strict latency limit to allow
+		 * the CPU to enter the shallowest idle state.
+		 */
+		ret = rte_power_qos_set_cpu_resume_latency(lcore_id,
+					RTE_POWER_QOS_STRICT_LATENCY_VALUE);
+		if (ret < 0) {
+			RTE_LOG(ERR, L3FWD_POWER,
+				"Failed to set strict resume latency on CPU%u.\n",
+				lcore_id);
+			return ret;
+		}
+	}
+
 	return ret;
 }
 
@@ -2299,6 +2316,13 @@ deinit_power_library(void)
 			}
 		}
 	}
+
+	RTE_LCORE_FOREACH(lcore_id) {
+		/* Restore the original value in kernel. */
+		rte_power_qos_set_cpu_resume_latency(lcore_id,
+				RTE_POWER_QOS_RESUME_LATENCY_NO_CONSTRAINT);
+	}
+
 	return ret;
 }
 
-- 
2.22.0