Changeset 13d33a75 for libcfa/src/concurrency/kernel.cfa

Timestamp:

Aug 18, 2020, 4:31:19 PM (4 years ago)

Author:

Thierry Delisle <tdelisle@…>

Branches:

ADT, arm-eh, ast-experimental, enum, forall-pointer-decay, jacob/cs343-translation, master, new-ast, new-ast-unique-expr, pthread-emulation, qualifiedEnum

Children:

8e9d567

Parents:

ef9988b (diff), f2384c9a (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge branch 'master' into new-ast

File:

• libcfa/src/concurrency/kernel.cfa (modified) (2 diffs)

libcfa/src/concurrency/kernel.cfa

@@ -103 +103 @@
         // Do it here
         kernelTLS.rand_seed ^= rdtscl();
+        kernelTLS.ready_rng.fwd_seed = 25214903917_l64u * (rdtscl() ^ (uintptr_t)&runner);
+        __tls_rand_advance_bck();
 
         processor * this = runner.proc;
@@ -532 +534 @@
                 unsigned total   = this.total;
                 processor * proc = &this.list`first;
-                // Thread fence is unnecessary, but gcc-8 and older incorrectly reorder code without it
-                __atomic_thread_fence(__ATOMIC_SEQ_CST);
+                // Compiler fence is unnecessary, but gcc-8 and older incorrectly reorder code without it
+                asm volatile("": : :"memory");
                 if(l != __atomic_load_n(&this.lock, __ATOMIC_SEQ_CST)) { Pause(); continue; }
                 return [idle, total, proc];