[PATCH] Cygwin: Implement CPU_SET(3) macros

[Mark Geisert]

Corinna Vinschen wrote:
> Hi Mark,
> 
> On Jul  1 01:55, Mark Geisert wrote:
>> Corinna Vinschen wrote:
>>> On Jun 30 15:59, Mark Geisert wrote:
>>>> This patch supplies an implementation of the CPU_SET(3) processor
>>>> affinity macros as documented on the relevant Linux man page.
>>>> ---
>>>>    winsup/cygwin/include/sys/cpuset.h | 62 +++++++++++++++++++++++++++---
>>>>    winsup/cygwin/sched.cc             |  8 ++--
>>>>    2 files changed, 60 insertions(+), 10 deletions(-)
>>>> [...]
>>>> +#define CPU_SETSIZE  1024  // maximum number of logical processors tracked
>>>> +#define NCPUBITS     (8 * sizeof (__cpu_mask))  // max size of processor group
>>>> +#define CPU_GROUPMAX (CPU_SETSIZE / NCPUBITS)  // maximum group number
>>>> -#define __CPUELT(cpu)   ((cpu) / __NCPUBITS)
>>>> -#define __CPUMASK(cpu)  ((__cpu_mask) 1 << ((cpu) % __NCPUBITS))
>>>> +#define CPU_WORD(cpu) ((cpu) / NCPUBITS)
>>>> +#define CPU_MASK(cpu) ((__cpu_mask) 1 << ((cpu) % NCPUBITS))
>>>
>>> I wouldn't do that.  Three problems:
>>> [...]
>>> There's also the request from Sebastian on the newlib list to
>>> consolidate the cpuset stuff from RTEMS and Cygwin into a single
>>> definition.
>>> [...]
>> I've also found that taskset isn't working properly on my build system with
>> the new CPU_SET code, though my other testcases are.  So even as submitted,
>> and fixed per your comments here, there's a bit more to be done.
>>
>> ..mark
> 
> any chance to pick this up again?

Hi; yes, certainly. I'm back but ill. It may be a week or so before I have an 
update/fix. Top of my list of pending items that require concentration ;-).

..mark