Why is taskset still not in util-linux?
Thu Mar 19 23:29:46 GMT 2020
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.
More information about the Cygwin