From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <users-bounces@dpdk.org>
Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124])
	by inbox.dpdk.org (Postfix) with ESMTP id DA35BA0093
	for <public@inbox.dpdk.org>; Thu, 23 Jun 2022 20:03:15 +0200 (CEST)
Received: from [217.70.189.124] (localhost [127.0.0.1])
	by mails.dpdk.org (Postfix) with ESMTP id 790464067B;
	Thu, 23 Jun 2022 20:03:15 +0200 (CEST)
Received: from mail-oi1-f174.google.com (mail-oi1-f174.google.com
 [209.85.167.174])
 by mails.dpdk.org (Postfix) with ESMTP id 6BC2140146
 for <users@dpdk.org>; Thu, 23 Jun 2022 20:03:14 +0200 (CEST)
Received: by mail-oi1-f174.google.com with SMTP id y77so464372oia.3
 for <users@dpdk.org>; Thu, 23 Jun 2022 11:03:14 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112;
 h=mime-version:from:date:message-id:subject:to;
 bh=ol9KEIih+iLm+dGGnWDTEpiq0PtOVKFmtWjnNTsJ8P0=;
 b=eS8B5DiMKlPvdYUGEhfIN6JHVFeu2wNZXSh+5HXnbMcaVu4qbbnLic5tYKPygzseLJ
 y4yysadx0shF7RIxMsWjAhkU9hifRjG4+cf3dFsIzAFS1YtP5p/3s/p1qY/XWlrQ+FDX
 fPXgjwSKlFFMlR02QdfnbElTuGOdEb/rznuFVYRP6mIfrlvKSd3iX0+COsOUKcszSUxs
 QdzfU72lMTUofe/u//n7L536LvxxjPI1VtXYT8MfjXYFE2uoZval3RnbmkwnSYtGEIJ9
 HYmJjgW+3b3lkVj+Wvw0RFNS9c4seDK1rSy25wKsllcTV2FkAQQfqNxlNT/E+1GU5COp
 H8Tg==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
 d=1e100.net; s=20210112;
 h=x-gm-message-state:mime-version:from:date:message-id:subject:to;
 bh=ol9KEIih+iLm+dGGnWDTEpiq0PtOVKFmtWjnNTsJ8P0=;
 b=XapFIk4tUx8BWF+s/YKywyU9UhLR8SvkPXwdi4M/QdOwH0rIDDLWSkEoX58vO9NVnD
 drtW4HnC2eiqpBZsSWOTb5lIPmXR/pdZi28cXPMceuYsp2i7J6VwLdOvBtYJ6z1RYjHq
 A7fHItdg87pDWlOMSyue46pItnRGXBsg+t+S34BLhTEPQWcW0n4ODSNmhhtrngo7mBP/
 8A+RiTXpKPIf/ivOFZq/OhwV/8Ds+DOISnfbdlKSmoPvTHqIc9oNWZpgcZ1+BMWirNLT
 AlEYhINPl7HrYPcTPStkxzv40Ok1kqERbE/TZ4wBCe+tdUu3P31svODuxQL+ynj2vpad
 PEsw==
X-Gm-Message-State: AJIora8bIo3aWTuIcCYVnbKIaetodiw8SWWwOKXdyzed8ZyYT/DrjH0R
 cytfpgBhff3nbIZHpsbFvHlpl5ofhM1j3YU03XC3fixgn8qK3w==
X-Google-Smtp-Source: AGRyM1t1EJvChC6Dgj2FzbrkIYVAMbvrAa6s15M7KNg/l553nZyg7X50K+4HV85C4tCAeSh1VAjD8NruYnOhLckyAtU=
X-Received: by 2002:a05:6808:14c9:b0:331:4811:7380 with SMTP id
 f9-20020a05680814c900b0033148117380mr3007323oiw.243.1656007393402; Thu, 23
 Jun 2022 11:03:13 -0700 (PDT)
MIME-Version: 1.0
From: Antonio Di Bacco <a.dibacco.ks@gmail.com>
Date: Thu, 23 Jun 2022 20:03:02 +0200
Message-ID: <CAO8pfF=yo37Ng5QAcopL=6LgKMHr4+=pPcONPATyS+OD0GLgfg@mail.gmail.com>
Subject: Large interruptions for EAL thread running on isol core
To: users@dpdk.org
Content-Type: text/plain; charset="UTF-8"
X-BeenThere: users@dpdk.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: DPDK usage discussions <users.dpdk.org>
List-Unsubscribe: <https://mails.dpdk.org/options/users>,
 <mailto:users-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://mails.dpdk.org/archives/users/>
List-Post: <mailto:users@dpdk.org>
List-Help: <mailto:users-request@dpdk.org?subject=help>
List-Subscribe: <https://mails.dpdk.org/listinfo/users>,
 <mailto:users-request@dpdk.org?subject=subscribe>
Errors-To: users-bounces@dpdk.org

I'm running a DPDK thread on an isolated core. I also set some  flags
that could help keeping the core at rest on linux like: nosoftlockup
nohz_full rcu_nocbs irqaffinity.

Unfortunately the thread gets some interruptions that stop the thread
for about 20-30 micro seconds. This seems smal but my application
suffers a lot.

I also tried to use  rte_thread_set_priority that indeed has a strong
effect but unfortunately creates problems to Linux (like network not
working).

Is there any other knob that could help running the DPDK thread with
minimum or no interruptions at all?