From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 8550CA00E6 for ; Mon, 8 Jul 2019 20:43:35 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 801E41B953; Mon, 8 Jul 2019 20:43:34 +0200 (CEST) Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by dpdk.org (Postfix) with ESMTP id 557FE58C6 for ; Mon, 8 Jul 2019 20:43:32 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 08 Jul 2019 11:15:51 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.63,466,1557212400"; d="scan'208";a="165527988" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.10]) ([10.237.221.10]) by fmsmga008.fm.intel.com with ESMTP; 08 Jul 2019 11:15:50 -0700 To: Ziyang Xuan , dev@dpdk.org Cc: cloud.wangxiaoyun@huawei.com, luoxianjun@huawei.com, tanya.brokhman@huawei.com References: <1562309267-65831-1-git-send-email-xuanziyang2@huawei.com> From: Ferruh Yigit Openpgp: preference=signencrypt Autocrypt: addr=ferruh.yigit@intel.com; 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WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.7.2 MIME-Version: 1.0 In-Reply-To: <1562309267-65831-1-git-send-email-xuanziyang2@huawei.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Subject: Re: [dpdk-dev] [PATCH v2 1/1] net/hinic: use mutex replace spin lock X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On 7/5/2019 7:47 AM, Ziyang Xuan wrote: > Using spin lock to protect critical resources > of sending mgmt messages. This will make high > CPU usage for rte_delay_ms when sending mgmt > messages frequently. We can use mutex to protect > the critical resources and usleep to reduce CPU > usage while keep functioning properly. > > Signed-off-by: Ziyang Xuan <...> > +static inline int hinic_mutex_init(pthread_mutex_t *pthreadmutex, > + const pthread_mutexattr_t *mattr) > +{ > + int err; > + > + err = pthread_mutex_init(pthreadmutex, mattr); > + if (unlikely(err)) > + PMD_DRV_LOG(ERR, "Fail to initialize mutex, error: %d", err); > + > + return err; > +} > + > +static inline int hinic_mutex_destroy(pthread_mutex_t *pthreadmutex) > +{ > + int err; > + > + err = pthread_mutex_destroy(pthreadmutex); > + if (unlikely(err)) > + PMD_DRV_LOG(ERR, "Fail to destroy mutex, error: %d", err); > + > + return err; > +} > + There was a comment from Stephen to use pthread APIs directly, can you please comment on that? > @@ -713,7 +718,7 @@ int hinic_aeq_poll_msg(struct hinic_eq *eq, u32 timeout, void *param) > } > > if (timeout != 0) > - rte_delay_ms(1); > + usleep(1000); Why is this change required? Aren't these are same?