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
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