Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261457AbVD3X2X (ORCPT ); Sat, 30 Apr 2005 19:28:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261459AbVD3X2X (ORCPT ); Sat, 30 Apr 2005 19:28:23 -0400 Received: from mustang.oldcity.dca.net ([216.158.38.3]:21739 "HELO mustang.oldcity.dca.net") by vger.kernel.org with SMTP id S261457AbVD3X2P (ORCPT ); Sat, 30 Apr 2005 19:28:15 -0400 Subject: Re: [patch] Real-Time Preemption, -RT-2.6.12-rc3-V0.7.46-01 From: Lee Revell To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Daniel Walker In-Reply-To: <20050422062714.GA23667@elte.hu> References: <20050325145908.GA7146@elte.hu> <20050331085541.GA21306@elte.hu> <20050401104724.GA31971@elte.hu> <20050405071911.GA23653@elte.hu> <20050421073537.GA1004@elte.hu> <20050422062714.GA23667@elte.hu> Content-Type: multipart/mixed; boundary="=-h9aikHK2/K1Q03OEi+e8" Date: Sat, 30 Apr 2005 19:28:13 -0400 Message-Id: <1114903693.12664.9.camel@mindpipe> Mime-Version: 1.0 X-Mailer: Evolution 2.3.1 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3997 Lines: 77 --=-h9aikHK2/K1Q03OEi+e8 Content-Type: text/plain Content-Transfer-Encoding: 7bit On Fri, 2005-04-22 at 08:27 +0200, Ingo Molnar wrote: > i have released the -V0.7.46-01 Real-Time Preemption patch, which can be > downloaded from the usual place: > > http://redhat.com/~mingo/realtime-preempt/ Ingo, With Mingming's patch to resolve the ext3 allocate-with-reservation latency, it looks like we are finally getting close to the lower limit that can be achieved with PREEMPT_DESKTOP. I've attached the trace of the lowest latency over several days of testing with 2.6.12-rc3-RT-V0.7.46-02 + Mingming's patch. It's only 127 usecs, and IIRC you mentioned previously that this code path can't be made preemptible in !PREEMPT_RT. Since Mingming's patch will have to live in -mm for a while, can it be added to the RT patchset as well? http://lkml.org/lkml/2005/4/22/127 Lee --=-h9aikHK2/K1Q03OEi+e8 Content-Disposition: attachment; filename=signal-delivery-trace.bz2 Content-Type: application/x-bzip; name=signal-delivery-trace.bz2 Content-Transfer-Encoding: base64 QlpoOTFBWSZTWZ2+PPQAPjF/gHT+EABoZ//3SEpfBK/v/+RgC388AAg8B2evNtgAdwAAABgAgySm TQ0BoPKDTQAAAADQAGopvxGlCSmk0yAGTR6mINAbUMIwjEVT/z1VKQAZA0BkYgAAAGEYBnqVJNKG 9U0AAyPUAyGgGRhAAHNMTJk0YTBMTTAJgEMEYEYApSiATTIIaTE0JiBoNqaNHqD0Jpic/0yU8caW TTLMnh056NOHHhudefDVwu3FBpkRMyqMw7fo+L4b9y6Mqr7s+eZSJ40k8XOdnnzsjbdgmTG1yGaL l0cvg4s9vr/fq8fP3/+5W8eLu9rovRDJlJtNMk0ZchM0TLomXDLkJmiZcja5SbTTJNGXDLkMmQyZ G1yNrkJkwyYZchkyZkRMuRtchkyk2mmXRMsxtMhM0TLomXKTaaZJoy4Zcja5CZMJkwmTDJkzIiZc ja4Zcja5DJnOzp1bn251c060wmTG1wy5DNE4tcLxEy4Zcja4W8VxUiQrhPjRGVeVsskvOWyWSL5P k5eCX0PT9r9fWgAAiAiAAAIgAAAiAAICAAIIABmZY+H4fjppnw/7A0a9qBgGyBptAzVr6NZxzdpp 26dX0dL1eKiGylXsxRr00CrjkWrFJ+KSGTb3cueb/HzdMeHH1HKkWgkMkG7Mzt9Gmv8euaapDTCH fnr82i+vrpdjf4eP/GyqQ3bfDS7+WmkBOzmxpp3cKUqIhSlREKVClwqFKhS4UqFRClQqFKhUQqFL gIhSoiFKhSoiFQpSoXCoUqIUqFQqFLgYGAiIUqFQqFKhcDClQpURClQqFLqd7SZdWxOdqaXNXMzM xsJoig09InuBkx5uXaJMJqhiogRNUkiUgdJIBACBowfDb27vT8t8d9sazWNUDLrz1ok1YqNe/f37 Yz1Huxt/Z7b6c2Z92nh2Dxw5YXHMwPmj0NAaAHfG6/v7Vr8e3+V/4K2rbum2efmxt3Vt6ja4tri5 OTfnLhw5cOW/fcGZ4p0mUq7tMvy16rLOsBSyWCbSyTBEQUggi9JshUCqWEQionOdrjl09O/Tvv0j Xp48eHm3mXjY2YZgYgsMIYIGDa129skm9RDt9tRDjpmWZjMWYwvbtslknXbZLJOJwCClilhddaA0 AOeONDYG9a0+kuOuebDfnzflve225VVhzODmSnb2NhsYMCCnjw25JVeQNaA+Bd6AexoAOTqdcX3D aJZ33H3MqtriYJYsEYIBJF2KA3vrQ8jYGhxvQ11Ouq66CXbfTbbbd777zBmZl6QQQsN4KFVTa5AG vX+HxoDBsaI2AH4lo50334Z7JJK7k7yZunlPMsWw4ww3Jcqj560ONgVrWgNADY1re9a0PyZ3nWUD na67bbbc3UnSy6FDgYMCGBhE8MDO956vOta87A9gGxoa3sXfPfXeearr0SSSSknpmDG8p5mCCCgg gklTfIGtAiqrjmqT55yuUkknmLMxq0jgwWGMCm20jyNDQVJIc8o88tttvmpzlPFDQsbCGDBY44qk vl0PX7PIAGhoft2CCQYGN3+xHuFwhYCLQji/YWq8yiiMV0Ip1yA46Bz+f4fh+r7/vcOH4eTXXzZf flzYBiBjBmZIMgeu+L2P6EPb7pC2/igPVA+Sgny0E3NrGzfZIN+GTMNEFwQWAZtxjVjUyg01tUDU fuP9cE3Nkkv7crMxi1oLg964dXW/OpL7EjZN9zA3KIfTp0oJ1J9c6XTlAzAMzt/hsOzuOf/vyydm fbpZFHY3t2EPLdODXm467coNM/lNNGyQsn1ezj12gb5ENQPRQG9EcepB1sPdnoyNdWlRDXz/m187 dbZqBstZ65JdD7nDQDLsyKOutIdHr2dG6kOLykLc30E3uemXOc3dA7by7GdEF9unoRC8pC6+HWBi qPq2cOnr68CC8CibgMdPPs2ILs8K1eOvn5/pA9purs7szC9lSXDEjHn0OqI7qiHj2geGt5txrcnD fjTTy5b4HpgZbqQyg5fVhEPmSPmQNtQuYHDkgszaB6CC2yE79j0gYxAy40E1TrPb6fN4+JDwgdOX Gg8iFcJC5eck81iCwDFB3UE+TnUQ7Ls8aiHs0EPj/3wrXckPPnf0vQ7tuZr3rzdvFzd4HWkNlBNu g5SF43hw3OKalIe/ntd0Umc2AaCDNLRvV79KouPUDnlAaaenSB3Woh5Nw5MNDacTssrd3kFv04+F cacaDboxdtcZ0mnpRG3YxUcpCxQcP1e73/T9mz7Pf/b4krtJJK1/mSGyS4pFciV2lLsmzVQyySWZ UNQLiUpErSUSiSuiSSZJIpIlaSlEmqqQkkmSTxxVVCklaV2kklZJJJu7tK7tRJJkktyQkkmSTxxd 8JVTaUSUSiSuiSSTd3aV2lElKJJbkhJJUknjit2ruKlaVWlElEiWXITFVJXaUu1JISS3CSTIYDBB BAhAxBGwxYYYYQQQtsMQQEEEEEEEQQQQQFQQQMMNsMMQEEEEUKFCCAgggggiCCDxVre/A8b3DJwS kklaUSUok0SbN2lVpRJSlIbJMLhJJkhHjWxNhb9Q93V8nSqNbw0IPMeEDy8vHygYygnpTcgfA5X6 aP8YaZMtNf/i7kinChITt8eegA== --=-h9aikHK2/K1Q03OEi+e8-- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/