On Mar 18 00:53, Mark Geisert wrote: > Due to deficient testing, the current code doesn't return a valid result > to users of sched_getaffinity(). The updated code carries the determined > procmask through to the generation of result cpu mask. > > Recognize Windows' limitation that if the process is multi-group (i.e., > has threads in multiple cpu groups) there is no visibility to which > processors in other groups are being used. One could remedy this by > looping through all the process' threads, but that could be expensive > so is left for future contemplation. In addition, we'd have to maintain > our own copy of each thread's current group and mask in internal overhead. > (By the way, multi-group processes are only possible on Windows systems > with more than 64 hardware threads.) > > A release note for 3.6.0 is included. > > Reported-by: Christian Franke <christian.fra...@t-online.de> > Addresses: https://cygwin.com/pipermail/cygwin/2025-March/257616.html > Signed-off-by: Mark Geisert <m...@maxrnd.com> > Fixes: 641ecb07533e ("Cygwin: Implement sched_[gs]etaffinity()") > > --- > winsup/cygwin/release/3.6.0 | 4 ++++ > winsup/cygwin/sched.cc | 11 +++++++++-- > 2 files changed, 13 insertions(+), 2 deletions(-)
Pushed. Thanks, Corinna
