diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 4d27a2db5..c6de5d72b 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,14 @@
+2002-08-31  Christopher January  <chris@atomice.net>
+
+	* fhandler_proc.cc: Add <sys/param.h> include.
+	(format_proc_uptime): Use KernelTime and UserTime only as they include
+	the other counters.
+	(format_proc_stat): KernelTime includes IdleTime, so subtract IdleTime
+	from KernelTime. Make number of 'jiffies' per second same as HZ define.
+	* fhandler_process.cc: Add <sys/param.h> include.
+	(format_process_stat): Make number of 'jiffies' per second same as
+	HZ define. Use KernelTime and UserTime only to calculate start_time.
+	
 2002-08-30  Christopher Faylor  <cgf@redhat.com>
 
 	(inspired by a patch from Egor Duda)
diff --git a/winsup/cygwin/fhandler_proc.cc b/winsup/cygwin/fhandler_proc.cc
index 97b8a1751..417b59a25 100644
--- a/winsup/cygwin/fhandler_proc.cc
+++ b/winsup/cygwin/fhandler_proc.cc
@@ -23,6 +23,7 @@ details. */
 #include "cygheap.h"
 #include <assert.h>
 #include <sys/utsname.h>
+#include <sys/param.h>
 #include "ntdll.h"
 
 #define _COMPILING_NEWLIB
@@ -423,9 +424,8 @@ format_proc_uptime (char *destbuf, size_t maxsize)
   else
     {
       idle_time = spt.IdleTime.QuadPart / 100000ULL;
-      uptime = (spt.InterruptTime.QuadPart + spt.KernelTime.QuadPart +
-		spt.IdleTime.QuadPart + spt.UserTime.QuadPart +
-		spt.DpcTime.QuadPart) / 100000ULL;
+      uptime = (spt.KernelTime.QuadPart +
+		        spt.UserTime.QuadPart) / 100000ULL;
     }
 
   return __small_sprintf (destbuf, "%U.%02u %U.%02u\n",
@@ -467,9 +467,9 @@ format_proc_stat (char *destbuf, size_t maxsize)
 		       ret, RtlNtStatusToDosError (ret));
 	  return 0;
 	}
-      kernel_time = (spt.KernelTime.QuadPart + spt.InterruptTime.QuadPart + spt.DpcTime.QuadPart) / 100000ULL;
-      user_time = spt.UserTime.QuadPart / 100000ULL;
-      idle_time = spt.IdleTime.QuadPart / 100000ULL;
+      kernel_time = (spt.KernelTime.QuadPart - spt.IdleTime.QuadPart) * HZ / 10000000ULL;
+      user_time = spt.UserTime.QuadPart * HZ / 10000000ULL;
+      idle_time = spt.IdleTime.QuadPart * HZ / 10000000ULL;
       interrupt_count = spt.InterruptCount;
       pages_in = spi.PagesRead;
       pages_out = spi.PagefilePagesWritten + spi.MappedFilePagesWritten;
diff --git a/winsup/cygwin/fhandler_process.cc b/winsup/cygwin/fhandler_process.cc
index dc885820a..6f59b2abd 100644
--- a/winsup/cygwin/fhandler_process.cc
+++ b/winsup/cygwin/fhandler_process.cc
@@ -23,6 +23,7 @@ details. */
 #include "dtable.h"
 #include "cygheap.h"
 #include "ntdll.h"
+#include <sys/param.h>
 #include <assert.h>
 
 #define _COMPILING_NEWLIB
@@ -454,22 +455,18 @@ format_process_stat (_pinfo *p, char *destbuf, size_t maxsize)
 	  return 0;
 	}
        fault_count = vmc.PageFaultCount;
-       utime = put.UserTime.QuadPart / 100000ULL;
-       stime = put.KernelTime.QuadPart / 100000ULL;
+       utime = put.UserTime.QuadPart * HZ / 10000000ULL;
+       stime = put.KernelTime.QuadPart * HZ / 10000000ULL;
        if (stodi.CurrentTime.QuadPart > put.CreateTime.QuadPart)
-	 start_time = (spt.InterruptTime.QuadPart + spt.KernelTime.QuadPart +
-		       spt.IdleTime.QuadPart + spt.UserTime.QuadPart +
-		       spt.DpcTime.QuadPart - stodi.CurrentTime.QuadPart +
-		       put.CreateTime.QuadPart) / 100000ULL;
+         start_time = (spt.KernelTime.QuadPart + spt.UserTime.QuadPart -
+                       stodi.CurrentTime.QuadPart + put.CreateTime.QuadPart) * HZ / 10000000ULL;
        else
 	 /*
 	  * sometimes stodi.CurrentTime is a bit behind
 	  * Note: some older versions of procps are broken and can't cope
 	  * with process start times > time(NULL).
 	  */
-	 start_time = (spt.InterruptTime.QuadPart + spt.KernelTime.QuadPart +
-		       spt.IdleTime.QuadPart + spt.UserTime.QuadPart +
-		       spt.DpcTime.QuadPart) / 100000ULL;
+	 start_time = (spt.KernelTime.QuadPart + spt.UserTime.QuadPart) * HZ / 10000000ULL;
        priority = pbi.BasePriority;
        unsigned page_size = getpagesize();
        vmsize = vmc.VirtualSize;
@@ -478,7 +475,7 @@ format_process_stat (_pinfo *p, char *destbuf, size_t maxsize)
     }
   else
     {
-      start_time = (GetTickCount() / 1000 - time(NULL) + p->start_time) * 100;
+      start_time = (GetTickCount() / 1000 - time(NULL) + p->start_time) * HZ;
     }
   return __small_sprintf (destbuf, "%d (%s) %c "
 				   "%d %d %d %d %d "