xref: /kernel/linux/linux-5.10/tools/memory-model/litmus-tests/SB+poonceonces.litmus (revision 8c2ecf20)
  • Home
  • History
  • Annotate Annotate
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
  • only in /kernel/linux/linux-5.10/tools/memory-model/litmus-tests/
18c2ecf20Sopenharmony_ciC SB+poonceonces
28c2ecf20Sopenharmony_ci
38c2ecf20Sopenharmony_ci(*
48c2ecf20Sopenharmony_ci * Result: Sometimes
58c2ecf20Sopenharmony_ci *
68c2ecf20Sopenharmony_ci * This litmus test demonstrates that at least some ordering is required
78c2ecf20Sopenharmony_ci * to order the store-buffering pattern, where each process writes to the
88c2ecf20Sopenharmony_ci * variable that the preceding process reads.
98c2ecf20Sopenharmony_ci *)
108c2ecf20Sopenharmony_ci
118c2ecf20Sopenharmony_ci{}
128c2ecf20Sopenharmony_ci
138c2ecf20Sopenharmony_ciP0(int *x, int *y)
148c2ecf20Sopenharmony_ci{
158c2ecf20Sopenharmony_ci	int r0;
168c2ecf20Sopenharmony_ci
178c2ecf20Sopenharmony_ci	WRITE_ONCE(*x, 1);
188c2ecf20Sopenharmony_ci	r0 = READ_ONCE(*y);
198c2ecf20Sopenharmony_ci}
208c2ecf20Sopenharmony_ci
218c2ecf20Sopenharmony_ciP1(int *x, int *y)
228c2ecf20Sopenharmony_ci{
238c2ecf20Sopenharmony_ci	int r0;
248c2ecf20Sopenharmony_ci
258c2ecf20Sopenharmony_ci	WRITE_ONCE(*y, 1);
268c2ecf20Sopenharmony_ci	r0 = READ_ONCE(*x);
278c2ecf20Sopenharmony_ci}
288c2ecf20Sopenharmony_ci
298c2ecf20Sopenharmony_ciexists (0:r0=0 /\ 1:r0=0)
30

Indexes created Thu Nov 07 10:32:03 CST 2024