From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay7-d.mail.gandi.net (relay7-d.mail.gandi.net [217.70.183.200]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id ED3B93683A4 for ; Thu, 30 Oct 2025 16:26:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761841615; cv=none; b=t1D/B8kFG2EHI7ci9GAVpw3IUxCyJgpV6kPG8VsnLr7akFQspjruan4d7fu6d6X8t7/1WS8heoVmSuhRIOKaXEh++Lg5UmVu6DDeuwxjgE1VWfrgJr2fGJFVsXpkaZrAMRD/Hwixe7kq4Rfw2gmS9lUh5+9ihznyCCsH6ivsJxw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761841615; c=relaxed/simple; bh=1AoYta74xiclGsLTKIX58gk5VTBM1O/yna2P4yCdkRI=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=KSQdDrWqg4LZuPwLlH/SV23eAj30QwIKETfQeret4e99ehWgf842L15HHm8AAApQgX+aI3iGCw85Kfm1ljlOfUaw12UmZ3ShJcI4MqlDVLZ/k+T0Ydrxgw9W0kxTy72VtKaWImLUq6aIslx7Pmw4PhMOZ8TUwMJ9q1Zf5BAS4+U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=xenomai.org; spf=pass smtp.mailfrom=xenomai.org; dkim=pass (2048-bit key) header.d=xenomai.org header.i=@xenomai.org header.b=omyHAlyB; arc=none smtp.client-ip=217.70.183.200 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=xenomai.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=xenomai.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=xenomai.org header.i=@xenomai.org header.b="omyHAlyB" Received: by mail.gandi.net (Postfix) with ESMTPSA id 89CBE4435C; Thu, 30 Oct 2025 16:26:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=xenomai.org; s=gm1; t=1761841605; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=DOFkn56gOrpoOJ2VHFGwJT9z3gjifti61z6IZ3q73/w=; b=omyHAlyBmFv+rpPh7/d1Ff3djA6UXPHNEWq8dnopmznTPlJtuLbuh1Rt1Bs2UJCXllq71m uKBQWy1h/8J7LqUTP23PLvSfa9BxbVVKbjYAFL8pq7zYGWT9ken0Zs4oZ0M7rsFQLzrt+a 1zZl7zaQdspQusK3RjZYfYAr4UEEzHJ6MjRw8hHyW8Z7FMh2Q/DGmIAs2WnMj5guZC9plb FqEh1x3cIQ8/+CZvOuIrDRBaTbFCC4T1v09HIjnjYiuc/aojnGga5OXEJzXQmCNHlhf5DM pNl+BCkgbGR1HOcETvmB0eKbZBMZ+yn3tgrjhk1lO15quyrteUn9lH4c2EtihA== From: Philippe Gerum To: =?utf-8?Q?=C5=81ukasz?= Majewski Cc: Giulio Moro , Xenomai Subject: Re: Unexpected switches to in-band In-Reply-To: <20251030132602.2d1ccfcc@wsk> (=?utf-8?Q?=22=C5=81ukasz?= Majewski"'s message of "Thu, 30 Oct 2025 13:26:02 +0100") References: <20251009151737.0d03b211@wsk> <20676160-4572-d92d-4b33-ff4255946345@bela.io> <87qzv9sa9c.fsf@xenomai.org> <87ikgls9kh.fsf@xenomai.org> <20251020094705.2ac256f2@wsk> <9d2bacac-8d70-f083-e926-21beee2207c2@bela.io> <87o6q1ad07.fsf@xenomai.org> <20251023155439.0170f987@wsk> <87a51djuor.fsf@xenomai.org> <20251027120535.7933c720@wsk> <20251027172505.29eecfb2@wsk> <875xbyawx7.fsf@xenomai.org> <20251029145125.71debaab@wsk> <20251030132602.2d1ccfcc@wsk> User-Agent: mu4e 1.12.12; emacs 30.2 Date: Thu, 30 Oct 2025 17:26:44 +0100 Message-ID: <87ldksuzi3.fsf@xenomai.org> Precedence: bulk X-Mailing-List: xenomai@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtdeggdduieejtdelucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhvfevufgjfhgffffkgggtgfesthhqredttderjeenucfhrhhomheprfhhihhlihhpphgvucfivghruhhmuceorhhpmhesgigvnhhomhgrihdrohhrgheqnecuggftrfgrthhtvghrnhepveegudejhedtheeihfelfeffleffleeitdelgfelhfduhedvtdeljeekteeghefhnecukfhppedvrgdtudemvgdtrgemudelsgemfegtugdtmeelkeelrgemhegtgegsmegsjehffhemsggrfhenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepihhnvghtpedvrgdtudemvgdtrgemudelsgemfegtugdtmeelkeelrgemhegtgegsmegsjehffhemsggrfhdphhgvlhhopehphihrohdpmhgrihhlfhhrohhmpehrphhmseigvghnohhmrghirdhorhhgpdhnsggprhgtphhtthhopeefpdhrtghpthhtohepgigvnhhomhgriheslhhishhtshdrlhhinhhugidruggvvhdprhgtphhtthhopehgihhulhhiohessggvlhgrrdhiohdprhgtphhtthhopehluhhkmhgrsehnrggslhgruggvvhdrtghomh X-GND-Sasl: rpm@xenomai.org =C5=81ukasz Majewski writes: > > -0 [002] *.~1. 128.466469: evl_timer_shot: > latmus_pulse_handler at 128.467208 (delay: 739 us, 195206 cycles) > > Why there is such increase in "delay" (253 vs 739 us) ? This is the delay until the next timer tick in an absolute timeline, therefore the larger the value, the lesser time we consumed to handle the last tick prior to programming the next one (e.g. 128.466214s + 253us =3D 128.466467s). The time consumed is still huge for this class of hardware, but ftrace + memory stressing do explain this. --=20 Philippe.