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[209.132.180.67]) by mx.google.com with ESMTP id bh1-v6si5349091plb.190.2018.09.26.07.44.25; Wed, 26 Sep 2018 07:44:42 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@kdab.com header.s=dkim header.b=xxq8bSZh; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=kdab.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727484AbeIZU5c (ORCPT + 99 others); Wed, 26 Sep 2018 16:57:32 -0400 Received: from mail.kdab.com ([176.9.126.58]:47183 "EHLO mail.kdab.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727067AbeIZU5b (ORCPT ); Wed, 26 Sep 2018 16:57:31 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kdab.com; h= content-type:content-type:mime-version:references:in-reply-to :organization:message-id:date:date:subject:subject:from:from; s= dkim; t=1537973049; x=1538837050; bh=lF/FHSf13Z3v2WPZpuDYFfVGNrS nzQq9uGLQYhyhmlQ=; b=xxq8bSZh1vAiAZpWq9Hx1vMNZGpV4pKOkwAhgZa7XYZ o+pV2Cv/3hlQnY8W/zAJzMv8LTQtzy0qGR64tLAf4dnn3WggScBmbw587qEKjDTF ixqUTqwHXSXTpO/rFUtvRrSeuhIo68F1mBCwTltSznPfatI2h3KWyNq823zadzEk = X-Virus-Scanned: amavisd-new at kdab.com From: Milian Wolff To: Andi Kleen Cc: Jiri Olsa , Arnaldo Carvalho de Melo , Peter Zijlstra , lkml , Ingo Molnar , Namhyung Kim , David Ahern , Alexander Shishkin , Stephane Eranian , Frederic Weisbecker Subject: Re: [RFC 00/10] perf: Add cputime events/metrics Date: Wed, 26 Sep 2018 16:44:08 +0200 Message-ID: <6856997.NognPVqETE@milian-kdab2> Organization: KDAB In-Reply-To: <20180606231016.o3u3u3nduoq7227e@two.firstfloor.org> References: <20180606221513.11302-1-jolsa@kernel.org> <20180606231016.o3u3u3nduoq7227e@two.firstfloor.org> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart1828815.siWoHAEYLp"; micalg="sha256"; protocol="application/pkcs7-signature" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --nextPart1828815.siWoHAEYLp Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" On Thursday, June 7, 2018 1:10:18 AM CEST Andi Kleen wrote: > > I had some issues with IDLE counter being miscounted due to stopping > > of the idle tick. I tried to solve it in this patch (it's part of the > > > > patchset): > > perf/cputime: Don't stop idle tick if there's live cputime event > > > > but I'm pretty sure it's wrong and there's better solution. > > At least on intel we already have hardware counters for different idle > states. You just would need to add them and convert to the same > unit. > > But of course it's still useful when this is not available. > > > My current plan is now to read those counters in perf top/record/report > > to show (at least) the idle percentage for the current profile. > > It's useful. Thanks for working on it. I was thinking about doing > something similar for some time. Hey Jiri, what happened to this patch series? I also believe it's super useful, even when it's not yet perfect. Thanks -- Milian Wolff | milian.wolff@kdab.com | Senior Software Engineer KDAB (Deutschland) GmbH, a KDAB Group company Tel: +49-30-521325470 KDAB - The Qt, C++ and OpenGL Experts --nextPart1828815.siWoHAEYLp Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCCDEIw ggXmMIIDzqADAgECAhBqm+E4O/8ra58B1dm4p1JWMA0GCSqGSIb3DQEBDAUAMIGFMQswCQYDVQQG EwJHQjEbMBkGA1UECBMSR3JlYXRlciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdTYWxmb3JkMRowGAYD VQQKExFDT01PRE8gQ0EgTGltaXRlZDErMCkGA1UEAxMiQ09NT0RPIFJTQSBDZXJ0aWZpY2F0aW9u IEF1dGhvcml0eTAeFw0xMzAxMTAwMDAwMDBaFw0yODAxMDkyMzU5NTlaMIGXMQswCQYDVQQGEwJH QjEbMBkGA1UECBMSR3JlYXRlciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdTYWxmb3JkMRowGAYDVQQK ExFDT01PRE8gQ0EgTGltaXRlZDE9MDsGA1UEAxM0Q09NT0RPIFJTQSBDbGllbnQgQXV0aGVudGlj YXRpb24gYW5kIFNlY3VyZSBFbWFpbCBDQTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEB 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