On 2017-09-26, at 5:24 PM, Christoph Biedl wrote: >> The sync operations for double word operations were introduced in gcc on >> 2014-11-21. >> These require kernel support. I suspect the stalls occur because your >> kernel is too old and >> doesn't support double-word atomics. > > Didn't think of such a thing, and indeed I'm running my own kernel, > currently 4.9 and 4.13.
4.9.51 has the new lws impletation with 64-bit support. Don't know about all 4.8 versions. Are you running 64-bit kernel? 32-bit kernels use slightly different code. Your stripped test passes on bell (mx3210). It runs 64-bit kernels. Dave -- John David Anglin [email protected]
