Received: by 2002:a05:6a10:9848:0:0:0:0 with SMTP id x8csp3398015pxf; Mon, 15 Mar 2021 08:43:24 -0700 (PDT) X-Google-Smtp-Source: ABdhPJx14g+tY13Ddjpy8bjvKnyGA8ee5aBNsgWBL/7SY+/Vurw4COPG3bq1p2OeI7WiHiIrd/Qh X-Received: by 2002:a17:906:b4c:: with SMTP id v12mr24587778ejg.330.1615823004307; Mon, 15 Mar 2021 08:43:24 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1615823004; cv=none; d=google.com; s=arc-20160816; b=I0hZ6deBm84xgF07YW7HX+W/1zqO+uRsnUBd23g0qal9KmUBQp2WL0Ns3Tkay11i6c JWYaERvbEVhPBFowH2xGmGVlEXyNGImAmHjW16uOAEEkdPBF8ZabCy5jtcVUsptYu89k evJdy7glqXtA8Yio6bnd+uIFeJBbbS9YrTew7JYcSDW+FMOz1ypvFuK+1u4iLzf8F0yP bX5vPEU2fnulNyoZrZIxisj07jg6f1XRGn+nOatHlX5aJsGmR/zd/g8CpENN2JtuiEdz JtscFGReTxldjpMufhfgFIx0ObNHBbrln8Lrot3qIHZkAWQe0MAugJwFsv8Cudb+O3ck Js3w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:user-agent:in-reply-to:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :dkim-signature; bh=qKEiqWkd+vTdel60Nz7+dVA4piWiwZUw/vCyOIgCeHE=; b=AIZP2PJvWfYoJfl9q58bkYbCy3p6QHAf8mCR4RuzJwVoCSU9Xgae1oQOgHO80LXxj2 s0bsD5afi4hlpLf+vbIB18GccRsH4ga2koeovnpAloqs79zIWcplw4x59hKiTNdIlTB4 b9jwG5qcXq4n5xrx4l7lKpqZ68+kvLiXRm+2j1ul54YtXGGJFTY5J9KrFWt8OQqOc7ac xDiefJsYLkDgsxtP7w72Oi49mIyaSvpF1H5Ht/N0fk08bUM1Fwgd7rw5vsjn86tzA4Jo bq9rhOnNsTsOe4IBzXIRPmPzaVK9ubqV3hTsSXcC4L2yGLh4/YKt1W/otvyzBBzeUdx6 sbPw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@firstfloor.org header.s=mail header.b=MfsH11ob; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id m26si12219156edv.514.2021.03.15.08.43.01; Mon, 15 Mar 2021 08:43:24 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@firstfloor.org header.s=mail header.b=MfsH11ob; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229696AbhCOPl5 (ORCPT + 99 others); Mon, 15 Mar 2021 11:41:57 -0400 Received: from one.firstfloor.org ([193.170.194.197]:47228 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231757AbhCOPlh (ORCPT ); Mon, 15 Mar 2021 11:41:37 -0400 X-Greylist: delayed 443 seconds by postgrey-1.27 at vger.kernel.org; Mon, 15 Mar 2021 11:41:37 EDT Received: by one.firstfloor.org (Postfix, from userid 503) id B71F886851; Mon, 15 Mar 2021 16:34:00 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=firstfloor.org; s=mail; t=1615822440; bh=qKEiqWkd+vTdel60Nz7+dVA4piWiwZUw/vCyOIgCeHE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=MfsH11obdNy10LOj3fB6pafP/TA4hYBZJv+R5mmS7OYos8gIuXYJ1qMEizR77fsiQ HBmEj6CMTLTGibVpji1PexWK/aa2iFrfcoIq+yHlYowIT9Ash+/soCb6GS/nZBhE3l OSjeQkRaaSze7nC67mThThjZo4VHsPrpL9uEuvg8= Date: Mon, 15 Mar 2021 08:34:00 -0700 From: Andi Kleen To: Arnaldo Carvalho de Melo Cc: Song Liu , Andi Kleen , Jiri Olsa , linux-kernel , Kernel Team , "namhyung@kernel.org" , "linux-perf-users@ghostprotocols.net" Subject: Re: [PATCH] perf-stat: introduce bperf, share hardware PMCs with BPF Message-ID: <20210315153359.s47atiznpxkrc7oq@two.firstfloor.org> References: <20210312020257.197137-1-songliubraving@fb.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20170113 (1.7.2) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > I still think that there is value in taking those measurements after we > enable the counters, as, for instance, for interval mode we want > measurements with the counters enabled, whatever happens before the > counters are enabled is just startup time, etc. Jiri, Andi? Yes I agree. Only the time with counters enabled matters. -Andi