Received: by 2002:a25:ef43:0:0:0:0:0 with SMTP id w3csp823721ybm; Wed, 27 May 2020 08:51:57 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyUBcFbRaLPixrxY88ynL8z6YnhuMOlCD+Hx/WqsWMrQItYyYj3ZEBfka3y3aFnP6TozkI3 X-Received: by 2002:a50:9b19:: with SMTP id o25mr25403887edi.141.1590594717581; Wed, 27 May 2020 08:51:57 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1590594717; cv=none; d=google.com; s=arc-20160816; b=zaOGOhIGLzZiNcD1cLTcDQ7jJSE2wmuJ5fBGzRm/QD010sAFxOMcIP4+yvzm/VEPjm QZbZE2WWbZWRbKZj0JHSk6u5DyLYrmwSCU6CTlWVsUzWhi1pIc+KNiqtjMf9WeC1pQlo Vc9kvTCIfGZd2mNNG/YG3E7MtjwSbAoiIFomoVbN2KURD7njd7DZ85dukZKQ7xKivj4r sumFYUiwZfhwi8THyjGz0SLLHXHfbOv1kSAc3sBaTm0d8OxWegA6e/tZM/lpJ3ParJgv 2BpYBFrhS4HWgk/okHFvk5OaVyM7lKrMtmDnwGHLt9tPys+dvw/c6nZf2JhdSQevAupE /8ng== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:content-transfer-encoding :content-id:content-language:accept-language:in-reply-to:references :message-id:date:thread-index:thread-topic:subject:cc:to:from; bh=1q+EVEpJ3GoYm2IeljDl/2CkHJXcjCdOPjyMGDFQuvE=; b=1AN4qFE57gSjRM3IVLAwZAMmIfCR227Pn+zJqLz8xrE7BaPymV+oHvV7K8mJs5TXri KYSgz2k31hoFILqD0SJK2uRfP5LVFOxcnPlVmA9/dVHj+aoSQJ3PsrVdF4qNX+5O932q uj4n92g93l2cI29MeqqS+d1NOFFjhxDGVyYr1CYT1rhK86v2aVZL8LpCMMWPwi/WE5jQ Vgfw/nEfFF6PUsA9YUMBHmePvRUtlMujbQWXvu4kZx06nXlwGKH/kkohcqUu/LIkRVCZ 2tvHdjmA1NSiV9By0wg+IZ6WoVWTLOjkwgeM75eGbTG3Hetk8tzqMo8E6CwXYnBLB0bM n+Gg== ARC-Authentication-Results: i=1; mx.google.com; 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 u23si2407807ejr.391.2020.05.27.08.51.34; Wed, 27 May 2020 08:51:57 -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; 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 S1730132AbgE0MuJ (ORCPT + 99 others); Wed, 27 May 2020 08:50:09 -0400 Received: from skedge03.snt-world.com ([91.208.41.68]:36550 "EHLO skedge03.snt-world.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730118AbgE0MuH (ORCPT ); Wed, 27 May 2020 08:50:07 -0400 Received: from sntmail11s.snt-is.com (unknown [10.203.32.181]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by skedge03.snt-world.com (Postfix) with ESMTPS id 40AE967A7C0; Wed, 27 May 2020 14:50:02 +0200 (CEST) Received: from sntmail12r.snt-is.com (10.203.32.182) by sntmail11s.snt-is.com (10.203.32.181) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1913.5; Wed, 27 May 2020 14:50:01 +0200 Received: from sntmail12r.snt-is.com ([fe80::e551:8750:7bba:3305]) by sntmail12r.snt-is.com ([fe80::e551:8750:7bba:3305%3]) with mapi id 15.01.1913.007; Wed, 27 May 2020 14:50:01 +0200 From: Schrempf Frieder To: Russell King - ARM Linux admin CC: Shawn Guo , Sascha Hauer , "Rafael J. Wysocki" , Daniel Lezcano , Kate Stewart , Enrico Weigelt , Thomas Gleixner , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "linux-pm@vger.kernel.org" Subject: Re: High interrupt latency with low power idle mode on i.MX6 Thread-Topic: High interrupt latency with low power idle mode on i.MX6 Thread-Index: AQHWNBMPiENrGmpy5EqtWjfM5SmIn6i7sUkAgAAPtYA= Date: Wed, 27 May 2020 12:50:01 +0000 Message-ID: References: <20200527115347.GL1551@shell.armlinux.org.uk> In-Reply-To: <20200527115347.GL1551@shell.armlinux.org.uk> Accept-Language: de-DE, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [172.25.9.193] x-c2processedorg: 51b406b7-48a2-4d03-b652-521f56ac89f3 Content-Type: text/plain; charset="utf-8" Content-ID: <60F0691562A52040BE3F6D3F77FD5DB5@snt-world.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-SnT-MailScanner-Information: Please contact the ISP for more information X-SnT-MailScanner-ID: 40AE967A7C0.AF726 X-SnT-MailScanner: Not scanned: please contact your Internet E-Mail Service Provider for details X-SnT-MailScanner-SpamCheck: X-SnT-MailScanner-From: frieder.schrempf@kontron.de X-SnT-MailScanner-To: daniel.lezcano@linaro.org, info@metux.net, kstewart@linuxfoundation.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, linux@armlinux.org.uk, rjw@rjwysocki.net, s.hauer@pengutronix.de, shawnguo@kernel.org, tglx@linutronix.de X-Spam-Status: No Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org T24gMjcuMDUuMjAgMTM6NTMsIFJ1c3NlbGwgS2luZyAtIEFSTSBMaW51eCBhZG1pbiB3cm90ZToN Cj4gT24gV2VkLCBNYXkgMjcsIDIwMjAgYXQgMTA6Mzk6MTJBTSArMDAwMCwgU2NocmVtcGYgRnJp ZWRlciB3cm90ZToNCj4+IEhpLA0KPj4NCj4+IG9uIG91ciBpLk1YNlVML1VMTCBib2FyZHMgcnVu bmluZyBtYWlubGluZSBrZXJuZWxzLCB3ZSBzZWUgYW4gaXNzdWUgd2l0aA0KPj4gUlM0ODUgY29s bGlzaW9ucyBvbiB0aGUgYnVzLiBUaGVzZSBhcmUgY2F1c2VkIGJ5IHRoZSByZXNldHRpbmcgb2Yg dGhlDQo+PiBSVFMgc2lnbmFsIGJlaW5nIGRlbGF5ZWQgYWZ0ZXIgZWFjaCB0cmFuc21pc3Npb24u IFRoZSBUWERDIGludGVycnVwdA0KPj4gdGFrZXMgc2V2ZXJhbCBtaWxsaXNlY29uZHMgdG8gdHJp Z2dlciBhbmQgdGhlIHNsYXZlIG9uIHRoZSBidXMgYWxyZWFkeQ0KPj4gc3RhcnRzIHRvIHNlbmQg YSByZXBseSBpbiB0aGUgbWVhbnRpbWUuDQo+Pg0KPj4gV2UgZm91bmQgb3V0IHRoYXQgdGhlc2Ug ZGVsYXlzIG9ubHkgaGFwcGVuIHdoZW4gdGhlIENQVSBpcyBpbiAibG93IHBvd2VyDQo+PiBpZGxl IiBtb2RlIChBUk0gcG93ZXIgb2ZmKS4gV2hlbiB3ZSBkaXNhYmxlIGNwdWlkbGUgc3RhdGUgMiBv ciBwdXQgc29tZQ0KPj4gYmFja2dyb3VuZCBsb2FkIG9uIHRoZSBDUFUgZXZlcnl0aGluZyB3b3Jr cyBmaW5lIGFuZCB0aGUgZGVsYXlzIGFyZSBnb25lLg0KPj4NCj4+IGVjaG8gMSA+IC9zeXMvZGV2 aWNlcy9zeXN0ZW0vY3B1L2NwdTAvY3B1aWRsZS9zdGF0ZTIvZGlzYWJsZQ0KPj4NCj4+IEl0IHNl ZW1zIGxpa2UgYWxzbyBvdGhlciBpbnRlcmZhY2VzIChJMkMsIGV0Yy4pIG1pZ2h0IGJlIGFmZmVj dGVkIGJ5DQo+PiB0aGVzZSBpbmNyZWFzZWQgbGF0ZW5jaWVzLCB3ZSBoYXZlbid0IGludmVzdGln YXRlZCB0aGlzIG1vcmUgY2xvc2VseSwNCj4+IHRob3VnaC4NCj4+DQo+PiBXZSBjdXJyZW50bHkg YXBwbHkgYSBwYXRjaCB0byBvdXIga2VybmVsLCB0aGF0IGRpc2FibGVzIGxvdyBwb3dlciBpZGxl DQo+PiBtb2RlIGJ5IGRlZmF1bHQsIGJ1dCBJJ20gd29uZGVyaW5nIGlmIHRoZXJlJ3MgYSB3YXkg dG8gZml4IHRoaXMNCj4+IHByb3Blcmx5PyBBbnkgaWRlYXM/DQo+IA0KPiBMZXQncyBleGFtaW5l IGEgYmFzaWMgZmFjdCBhYm91dCBwb3dlciBtYW5hZ2VtZW50Og0KPiANCj4gVGhlIGRlZXBlciBQ TSBtb2RlcyB0aGF0IHRoZSBzeXN0ZW0gZW50ZXJzLCB0aGUgaGlnaGVyIHRoZSBsYXRlbmN5IHRv DQo+IHJlc3VtZSBvcGVyYXRpb24uDQo+IA0KPiBTbywgSSdtIG5vdCBzdXJwcmlzZWQgdGhhdCB5 b3UgaGF2ZSBoaWdoZXIgbGF0ZW5jeSB3aGVuIHlvdSBhbGxvdyB0aGUNCj4gc3lzdGVtIHRvIGVu dGVyIGxvd2VyIHBvd2VyIG1vZGVzLiAgRG9lcyB0aGF0IG1lYW4gdGhhdCB0aGUga2VybmVsDQo+ IHNob3VsZCBub3QgcGVybWl0IGVudGVyaW5nIGxvd2VyIHBvd2VyIG1vZGVzIC0gbm8sIGl0J3Mg cG9saWN5IGFuZA0KPiBhcHBsaWNhdGlvbiBkZXBlbmRlbnQuDQo+IA0KPiBJZiB0aGUgaGFyZHdh cmUgaXMgZGVzaWduZWQgdG8gdXNlIHNvZnR3YXJlIHRvIG1hbmFnZSB0aGUgUlRTIHNpZ25hbA0K PiB0byBjb250cm9sIHRoZSBSUzQ4NSByZWNlaXZlciwgdGhlbiBJJ20gYWZyYWlkIHRoYXQgeW91 ciByZXBvcnQgcmVhbGx5DQo+IGRvZXMgbm90IHN1cnByaXNlIG1lIC0gdGhyb3dpbmcgdGhhdCBh dCBzb2Z0d2FyZSB0byBtYW5hZ2UgaXMgYSByZWFsbHkNCj4gc3R1cGlkIGlkZWEsIGJ1dCBpdCBz ZWVtcyBsb3RzIG9mIHBlb3BsZSBkbyB0aGlzLiAgSSd2ZSBoZWxkIHRoaXMgdmlldw0KPiBzaW5j ZSBJIHdvcmtlZCBvbiBhIHNhZmV0eSBjcml0aWNhbCBzeXN0ZW0gdGhhdCB1c2VkIFJTNDg1IGJh Y2sgaW4gdGhlDQo+IDE5OTBzIChMb25kb24gVW5kZXJncm91bmQgSnViaWxlZSBMaW5lIEV4dGVu c2lvbiBwdWJsaWMgYWRkcmVzcyBzeXN0ZW0uKQ0KPiANCj4gU28sIHdoYXQgd2UgaGF2ZSBoZXJl IGlzIHNldmVyYWwgdGhpbmdzIHRoYXQgY29tZSB0b2dldGhlciB0byBjcmVhdGUgYQ0KPiBwcm9i bGVtOg0KPiANCj4gMSkgaGlnaGVyIHBvd2VyIHNhdmluZ3MgcHJvZHVjZSBoaWdoZXIgbGF0ZW5j eSB0byByZXN1bWUgZnJvbQ0KPiAyKSBsYWNrIG9mIGhhcmR3YXJlIHN1cHBvcnQgZm9yIFJTNDg1 IGhhbGYgZHVwbGV4IGNvbW11bmljYXRpb24gbmVlZGluZw0KPiAgICAgc29mdHdhcmUgc3VwcG9y dA0KPiAzKSBhbiBhcHBsaWNhdGlvbiB0aGF0IG1ha2VzIHVzZSBvZiBSUzQ4NSBoYWxmIGR1cGxl eCBjb21tdW5pY2F0aW9uDQo+ICAgICB3aXRob3V0IGRpc2FibGluZyB0aGUgaGlnaGVyIGxhdGVu Y3kgcG93ZXIgc2F2aW5nIG1vZGVzDQo+IA0KPiBUaGUgcXVlc3Rpb24gaXMsIHdobyBzaG91bGQg ZGlzYWJsZSB0aG9zZSBoaWdoZXIgbGF0ZW5jeSBwb3dlciBzYXZpbmcNCj4gbW9kZXMgLSB0aGUg a2VybmVsLCBvciB1c2Vyc3BhY2U/DQo+IA0KPiBUaGUga2VybmVsIGtub3dzIHdoZXRoZXIgaXQg bmVlZHMgdG8gcHJvdmlkZSBzb2Z0d2FyZSBjb250cm9sIG9mIHRoZQ0KPiBSVFMgc2lnbmFsIG9y IG5vdCwgYnV0IHRoZSBrZXJuZWwgZG9lcyBub3Qga25vdyB0aGUgbWF4aW11bSBwZXJtaXNzaWJs ZQ0KPiBsYXRlbmN5ICh3aGljaCBpcyBhcHBsaWNhdGlvbiBzcGVjaWZpYy4pICBTbywgdGhlIGtl cm5lbCBkb2Vzbid0IGhhdmUNCj4gYWxsIHRoZSBpbmZvcm1hdGlvbiBpdCBuZWVkcy4gIEhvd2V2 ZXIsIHRoZXJlIGlzIGEgUW9TIHN1YnN5c3RlbSB3aGljaA0KPiBtYXkgaGVscCB5b3UuDQo+IA0K PiBUaGVyZSdzIGFsc28gdHdlYWtzIGF2YWlsYWJsZSB2aWENCj4gL3N5cy9kZXZpY2VzL3N5c3Rl bS9jcHUvY3B1Ki9wb3dlci9wbV9xb3NfcmVzdW1lX2xhdGVuY3lfdXMNCj4gDQo+IHdoaWNoIGNh biBiZSBwb2tlZCB0byBjb25maWd1cmUgdGhlIGxhdGVuY3kgdGhhdCBpcyByZXF1aXJlZCwgYW5k IHdpbGwNCj4gcHJldmVudCB0aGUgZGVlcGVyIFBNIHN0YXRlcyBiZWluZyBlbnRlcmVkLg0KDQpU aGFua3MgZm9yIHRoZSBkZXRhaWxlZCBleHBsYW5hdGlvbi4gVGhpcyBhbGwgbWFrZXMgcGVyZmVj dCBzZW5zZSB0byBtZS4NCkkgd2lsbCBrZWVwIGluIG1pbmQgdGhhdCB3ZSBuZWVkIHRvIGNvbnNp ZGVyIHRoaXMgYXNwZWN0IG9mIHBvd2VyIHNhdmluZyANCnZzLiBsYXRlbmN5IHdoZW4gZGVzaWdu aW5nIHN5c3RlbXMgYW5kIGFsc28gdGhhdCB3ZSBuZWVkIHRvIHByb3ZpZGUgdGhlIA0KaW5mb3Jt YXRpb24gZm9yIHRoZSBrZXJuZWwgdG8gZGVjaWRlIHdoaWNoIG9mIHRoZSB0d28gaXMgbW9yZSBp bXBvcnRhbnQuDQoNCkFsc28gdGhhbmtzIGZvciBwb2ludGluZyBvdXQgdGhlIFFvUyBzdWJzeXN0 ZW0uIEknbSBub3QgcXVpdGUgc3VyZSBpZiBpdCANCndvdWxkIHdvcmsgZm9yIHVzIHRvIHVzZSBw bV9xb3NfcmVzdW1lX2xhdGVuY3lfdXMgaW4gb3VyIHNwZWNpZmljIGNhc2UuIA0KVGhlIGFjdHVh bCBsYXRlbmN5IHdlIG9ic2VydmUgaXMgc29tZXRoaW5nIGxpa2UgMiB0byAzIG1pbGxpc2Vjb25k cyANCmxvbmdlciB3aXRoIGxvdyBwb3dlciBpZGxlIHRoYW4gd2l0aG91dCwgYnV0IHRoZSBleGl0 X2xhdGVuY3kgZm9yIGxvdyANCnBvd2VyIGlkbGUgc3BlY2lmaWVkIGluIHRoZSBjcHVpZGxlIGRy aXZlciBpcyBvbmx5IDMwMCB1cy4NCg0KU28gYXMgZmFyIGFzIEkgY2FuIHNlZSB3aXRoIHRoaXMg ZGlmZmVyZW5jZSBldmVuIGlmIHdlIHdvdWxkIHNldCANCnBtX3Fvc19yZXN1bWVfbGF0ZW5jeV91 cyB0byAxMDAwIHVzICh3aGljaCBzaG91bGQgYmUgZmFzdCBlbm91Z2ggZm9yIHRoZSANClJTNDg1 IHRvIHdvcmsgcHJvcGVybHkpLCB0aGUgbG93IHBvd2VyIGlkbGUgd291bGRuJ3QgYmUgZGlzYWJs ZWQuDQoNCkl0J3MgcmF0aGVyIHRoaXMgZGlzY3JlcGFuY3kgYmV0d2VlbiB0aGUgbGF0ZW5jeSBz ZXQgaW4gdGhlIGRyaXZlciBhbmQgDQp3aGF0IHdlIHNlZSBpbiByZWFsaXR5IHdoaWNoIG1ha2Vz IG1lIHdvbmRlciBpZiB0aGVyZSdzIHNvbWV0aGluZyBJJ20gDQptaXNzaW5nLg==