Some applications assume centisecond precision, or at most millisecond precision
(e.g. guile).  This is a work-around for them.

---
 clock.c     |    8 ++++----
 getclktck.c |    5 ++---
 setitimer.c |    2 +-
 times.c     |    2 +-
 4 files changed, 8 insertions(+), 9 deletions(-)
commit d57f2f9b4bd007846af2fb4217486ea572579010
Author: Richard Braun <rbraun@sceen.net>
Date:   Tue Aug 27 11:35:31 2013 +0200

    Express CPU time (clock_t) in centiseconds

diff --git a/sysdeps/mach/hurd/clock.c b/sysdeps/mach/hurd/clock.c
index 61a66be..51f7abe 100644
--- a/sysdeps/mach/hurd/clock.c
+++ b/sysdeps/mach/hurd/clock.c
@@ -44,10 +44,10 @@ clock (void)
   if (err)
     return __hurd_fail (err);
 
-  total = bi.user_time.seconds * 1000000 + bi.user_time.microseconds;
-  total += tti.user_time.seconds * 1000000 + tti.user_time.microseconds;
-  total += bi.system_time.seconds * 1000000 + bi.system_time.microseconds;
-  total += tti.system_time.seconds * 1000000 + tti.system_time.microseconds;
+  total = bi.user_time.seconds * 100 + bi.user_time.microseconds / 10000;
+  total += tti.user_time.seconds * 100 + tti.user_time.microseconds / 10000;
+  total += bi.system_time.seconds * 100 + bi.system_time.microseconds / 10000;
+  total += tti.system_time.seconds * 100 + tti.system_time.microseconds / 10000;
 
   return total;
 }
diff --git a/sysdeps/mach/hurd/getclktck.c b/sysdeps/mach/hurd/getclktck.c
index 69be2cc..5f7d946 100644
--- a/sysdeps/mach/hurd/getclktck.c
+++ b/sysdeps/mach/hurd/getclktck.c
@@ -18,12 +18,11 @@
 
 #include <time.h>
 
-/* Return frequency of `times'.
-   Since Mach reports CPU times in microseconds, we always use 1 million.  */
+/* Return frequency of `times'.  */
 int
 __getclktck (void)
 {
-  return 1000000;
+  return 100;
 }
 
 /* Before glibc 2.2, the Hurd actually did this differently, so we
diff --git a/sysdeps/mach/hurd/setitimer.c b/sysdeps/mach/hurd/setitimer.c
index 39b6b16..4992c89 100644
--- a/sysdeps/mach/hurd/setitimer.c
+++ b/sysdeps/mach/hurd/setitimer.c
@@ -42,7 +42,7 @@ quantize_timeval (struct timeval *tv)
   static time_t quantum = -1;
 
   if (quantum == -1)
-    quantum = 1000000 / __getclktck ();
+    quantum = 100 / __getclktck ();
 
   tv->tv_usec = ((tv->tv_usec + (quantum - 1)) / quantum) * quantum;
   if (tv->tv_usec >= 1000000)
diff --git a/sysdeps/mach/hurd/times.c b/sysdeps/mach/hurd/times.c
index 9e13a75..593c33a 100644
--- a/sysdeps/mach/hurd/times.c
+++ b/sysdeps/mach/hurd/times.c
@@ -29,7 +29,7 @@
 static inline clock_t
 clock_from_time_value (const time_value_t *t)
 {
-  return t->seconds * 1000000 + t->microseconds;
+  return t->seconds * 100 + t->microseconds / 10000;
 }
 
 /* Store the CPU time used by this process and all its