X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=rts%2Fposix%2FGetTime.c;h=15643b8319e5420a967d395b82957c7f667f1e0c;hb=7d9eb2e45b4a9ff4cb053b1ec37602be88528b62;hp=db7378d62b21923a84f9753fa80117dc04615f0c;hpb=fe07f054d7ae5e10b14d5fed730fe4424dabd587;p=ghc-hetmet.git

diff --git a/rts/posix/GetTime.c b/rts/posix/GetTime.c
index db7378d..15643b8 100644
--- a/rts/posix/GetTime.c
+++ b/rts/posix/GetTime.c
@@ -46,10 +46,32 @@
 
 Ticks getProcessCPUTime(void)
 {
-    struct rusage t;
-    getrusage(RUSAGE_SELF, &t);
-    return ((Ticks)t.ru_utime.tv_sec * TICKS_PER_SECOND +
-	    ((Ticks)t.ru_utime.tv_usec * TICKS_PER_SECOND)/1000000);
+#if !defined(BE_CONSERVATIVE) && defined(HAVE_CLOCK_GETTIME) && defined (_SC_CPUTIME) && defined(CLOCK_PROCESS_CPUTIME_ID) && defined(HAVE_SYSCONF)
+    static int checked_sysconf = 0;
+    static int sysconf_result = 0;
+
+    if (!checked_sysconf) {
+        sysconf_result = sysconf(_SC_CPUTIME);
+        checked_sysconf = 1;
+    }
+    if (sysconf_result != -1) {
+        struct timespec ts;
+        int res;
+        res = clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts);
+        if (res == 0) {
+            return ((Ticks)ts.tv_sec * TICKS_PER_SECOND +
+                    ((Ticks)ts.tv_nsec * TICKS_PER_SECOND) / 1000000000);
+        }
+    }
+#endif
+
+    // fallback to getrusage
+    {
+        struct rusage t;
+        getrusage(RUSAGE_SELF, &t);
+        return ((Ticks)t.ru_utime.tv_sec * TICKS_PER_SECOND +
+                ((Ticks)t.ru_utime.tv_usec * TICKS_PER_SECOND)/1000000);
+    }
 }
 
 Ticks getProcessElapsedTime(void)
@@ -134,15 +156,26 @@ Ticks getThreadCPUTime(void)
     }
     return ((usec * TICKS_PER_SECOND) / 1000000);
 
-#elif defined(HAVE_CLOCK_GETTIME) && defined(CLOCK_THREAD_CPUTIME_ID)
-    // clock_gettime() gives us per-thread CPU time.  It isn't
-    // reliable on Linux, but it's the best we have.
-    struct timespec ts;
-    int res;
-    res = clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts);
-    if (res == 0) {
-        return ((Ticks)ts.tv_sec * TICKS_PER_SECOND +
-                ((Ticks)ts.tv_nsec * TICKS_PER_SECOND) / 1000000000);
+#elif !defined(BE_CONSERVATIVE) && defined(HAVE_CLOCK_GETTIME) && defined (_SC_THREAD_CPUTIME) && defined(CLOCK_THREAD_CPUTIME_ID) && defined(HAVE_SYSCONF)
+    {
+        static int checked_sysconf = 0;
+        static int sysconf_result = 0;
+        
+        if (!checked_sysconf) {
+            sysconf_result = sysconf(_SC_THREAD_CPUTIME);
+            checked_sysconf = 1;
+        }
+        if (sysconf_result != -1) {
+            // clock_gettime() gives us per-thread CPU time.  It isn't
+            // reliable on Linux, but it's the best we have.
+            struct timespec ts;
+            int res;
+            res = clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts);
+            if (res == 0) {
+                return ((Ticks)ts.tv_sec * TICKS_PER_SECOND +
+                        ((Ticks)ts.tv_nsec * TICKS_PER_SECOND) / 1000000000);
+            }
+        }
     }
 #endif
     return getProcessCPUTime();
@@ -151,7 +184,7 @@ Ticks getThreadCPUTime(void)
 nat
 getPageFaults(void)
 {
-#if !defined(HAVE_GETRUSAGE) || irix_HOST_OS
+#if !defined(HAVE_GETRUSAGE) || irix_HOST_OS || haiku_HOST_OS
     return 0;
 #else
     struct rusage t;