Merge branch 'master' of ssh://git.kernel.dk/data/git/fio

diff --git a/arch/arch-s390.h b/arch/arch-s390.h
index bcd91636d04d8e6e3bd2137672377f84813cd57e..56cb23024bf70f8954cc7bfe29e5b439345f54d7 100644 (file)
--- a/arch/arch-s390.h
+++ b/arch/arch-s390.h
@@ -18,18 +18,25 @@
 #define __NR_sys_vmsplice      309
 #endif
 
-#define nop            asm volatile ("diag 0,0,68" : : : "memory")
+#define nop            asm volatile("nop" : : : "memory")
 #define read_barrier() asm volatile("bcr 15,0" : : : "memory")
 #define write_barrier()        asm volatile("bcr 15,0" : : : "memory")
 
+/*
+ * Fio needs monotonic (never lower), but not strict monotonic (never the same)
+ * so store clock fast is enough
+ */
 static inline unsigned long long get_cpu_clock(void)
 {
        unsigned long long clk;
 
-       __asm__ __volatile__("stck %0" : "=Q" (clk) : : "cc");
-       return clk;
+       __asm__ __volatile__("stckf %0" : "=Q" (clk) : : "cc");
+       return clk>>12;
 }
 
+#define ARCH_CPU_CLOCK_CYCLES_PER_USEC 1
+#define ARCH_HAVE_CPU_CLOCK
+
 #define ARCH_HAVE_INIT
 extern int tsc_reliable;
 static inline int arch_init(char *envp[])
@@ -38,6 +45,4 @@ static inline int arch_init(char *envp[])
        return 0;
 }
 
-#define ARCH_HAVE_CPU_CLOCK
-
 #endif

diff --git a/gettime.c b/gettime.c
index b89cd46fdd14e7cbe6290a424416b6268a6543d8..c6d45f8761f799e9e324b2f95f9b4bff40a56158 100644 (file)
--- a/gettime.c
+++ b/gettime.c
@@ -13,7 +13,7 @@
 #include "hash.h"
 #include "os/os.h"
 
-#ifdef ARCH_HAVE_CPU_CLOCK
+#if defined(ARCH_HAVE_CPU_CLOCK) && !defined(ARCH_CPU_CLOCK_CYCLES_PER_USEC)
 static unsigned long cycles_per_usec;
 static unsigned long inv_cycles_per_usec;
 #endif
@@ -177,7 +177,11 @@ static void *__fio_gettime(struct timeval *tp)
                } else if (tv)
                        tv->last_cycles = t;
 
+#ifdef ARCH_CPU_CLOCK_CYCLES_PER_USEC
+               usecs = t / ARCH_CPU_CLOCK_CYCLES_PER_USEC;
+#else
                usecs = (t * inv_cycles_per_usec) / 16777216UL;
+#endif
                tp->tv_sec = usecs / 1000000;
                tp->tv_usec = usecs % 1000000;
                break;
@@ -229,7 +233,7 @@ void fio_gettime(struct timeval *tp, void fio_unused *caller)
        }
 }
 
-#ifdef ARCH_HAVE_CPU_CLOCK
+#if defined(ARCH_HAVE_CPU_CLOCK) && !defined(ARCH_CPU_CLOCK_CYCLES_PER_USEC)
 static unsigned long get_cycles_per_usec(void)
 {
        struct timeval s, e;
@@ -318,9 +322,13 @@ static int calibrate_cpu_clock(void)
 #else
 static int calibrate_cpu_clock(void)
 {
+#ifdef ARCH_CPU_CLOCK_CYCLES_PER_USEC
+       return 0;
+#else
        return 1;
-}
 #endif
+}
+#endif // ARCH_HAVE_CPU_CLOCK
 
 #ifndef CONFIG_TLS_THREAD
 void fio_local_clock_init(int is_thread)