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Re: [PATCH] Cygwin: Implement CPU_SET(3) macros

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/             |  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
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.


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 ;-).


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