From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from m0.truegem.net (m0.truegem.net [69.55.228.47]) by sourceware.org (Postfix) with ESMTPS id E958B385C017 for ; Thu, 19 Mar 2020 23:29:52 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org E958B385C017 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=maxrnd.com Authentication-Results: sourceware.org; spf=none smtp.mailfrom=mark@maxrnd.com Received: (from daemon@localhost) by m0.truegem.net (8.12.11/8.12.11) id 02JNTm8U073536; Thu, 19 Mar 2020 16:29:48 -0700 (PDT) (envelope-from mark@maxrnd.com) Received: from 162-235-43-67.lightspeed.irvnca.sbcglobal.net(162.235.43.67), claiming to be "[192.168.1.100]" via SMTP by m0.truegem.net, id smtpdL8DfS6; Thu Mar 19 15:29:46 2020 Subject: Re: Why is taskset still not in util-linux? To: moss@cs.umass.edu, cygwin@cygwin.com References: <1348011a-261a-2a87-d361-4e51fa8dc19f@cs.umass.edu> <85ae12aa-6cc3-5d4c-5df2-25bf811ec6a9@maxrnd.com> <72fea68a-b3d7-e87c-726f-8a5a2587a992@maxrnd.com> <01e3d337-e5fe-f393-7634-3f1881bca315@cs.umass.edu> From: Mark Geisert Message-ID: Date: Thu, 19 Mar 2020 16:29:46 -0700 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0 SeaMonkey/2.49.4 MIME-Version: 1.0 In-Reply-To: <01e3d337-e5fe-f393-7634-3f1881bca315@cs.umass.edu> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=1.0 required=5.0 tests=KAM_DMARC_STATUS, KAM_LAZY_DOMAIN_SECURITY, SPF_HELO_NONE, SPF_NONE autolearn=no autolearn_force=no version=3.4.2 X-Spam-Level: * X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: cygwin@cygwin.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Cygwin mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 19 Mar 2020 23:29:57 -0000 Eliot Moss wrote: > On 3/16/2020 7:34 PM, Mark Geisert wrote: > > Mark Geisert wrote: > >> Eliot Moss wrote: > >>> > >>> Dear cygwin-ers -- > >>> > >>> Something I had asked about a while ago was the absence os taskset in cygwin's > >>> util-linux.  At the time, it was pointed out that the necessary get/set > >>> affinity library/system calls were not yet supported.  These were added a > >>> while ago, so it would seem that taskset ought to work.  In fact, I think > >>> someone got it going on their own.  Can we add it to util-linux now, > >>> officially?  I think this was intended but perhaps was overlooked or > >>> something. > >> > >> Report noted; thanks.  A solution is being worked. > > > > There's been no forward progress on this.  If you're comfortable getting the > util-linux source > > package through Cygwin setup*.exe, you can follow the steps shown in > > https://cygwin.com/pipermail/cygwin-apps/2020-March/039855.html to build > (with cygport) a local copy > > of util-linux that includes a taskset.exe you can move into /usr/local/bin, > for example. > > > > You might try that route if you're up for it.  Feel free to ask questions > here if you hit a snag. > > HTH, > > Thank you, Mark.  I decided to give it a try and got some distance, but hit a snag. > > First, I had to change configure.ac to add control to disable ionice (Cygwin > does not support a required syscall) while still trying to build taskset. > Previously taskset and ionice (and one other program) were controlled by the > single --enable-schedutils. > > Now, including sched.h does not provide the prototypes for sched_getaffinity, > etc.  I found a previous post that suggests we need to do -D_GNU_SOURCE for it > to work.  I am not sure of the best place to stick that, but I will see about > maybe a one line patch to taskset.c or something. Rats. Sorry you've hit some snags. Are you compiling directly with 'make' or the preferred 'cygport util-linux.cygport build'? With the latter I didn't need to make any changes to the source tree; all mods were accomplished with the new patch file and changes to util-linux.cygport itself. ..mark