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View File mvapich2-s390_get_cycles.patch of Package mvapich2 (Project home:eeich:hpc_alt)

diff --git src/mpid/ch3/channels/common/include/mv2_clock.h src/mpid/ch3/channels/common/include/mv2_clock.h
index 7edc148..ac117c2 100644
--- src/mpid/ch3/channels/common/include/mv2_clock.h
+++ src/mpid/ch3/channels/common/include/mv2_clock.h
@@ -82,6 +82,14 @@ static inline cycles_t get_cycles()
     return ret;
 }
 
+#elif defined(__s390__) || defined(__s390x__)
+typedef unsigned long cycles_t;
+static inline cycles_t get_cycles()
+{
+    unsigned long  clk;
+    asm volatile("stck %0" : "=Q" (clk) : : "cc");
+    return clk >> 2;
+}
 #else
 #warning get_cycles not implemented for this architecture: attempt asm/timex.h
 #include <asm/timex.h>