Fix inconstiency in recent_cpu update description.

[pintos-anon] / doc / 44bsd.texi

diff --git a/doc/44bsd.texi b/doc/44bsd.texi
index ba67ddaa876e6504f2c2b95993b7810415dd0c6c..e8ae11347bb9adf62ee2e7435831da58392c1937 100644 (file)
--- a/doc/44bsd.texi
+++ b/doc/44bsd.texi
@@ -175,14 +175,14 @@ using this formula:
 threads ready to run (see below).  If @var{load_avg} is 1, indicating
 that a single thread, on average, is competing for the CPU, then the
 current value of @var{recent_cpu} decays to a weight of .1 in
-@am{\log_{2/3}.1 \approx 6, ln(2/3)/ln(.1) = approx. 6} seconds; if
+@am{\log_{2/3}.1 \approx 6, ln(.1)/ln(2/3) = approx. 6} seconds; if
 @var{load_avg} is 2, then decay to a weight of .1 takes @am{\log_{3/4}.1
-\approx 8, ln(3/4)/ln(.1) = approx. 8} seconds.  The effect is that
+\approx 8, ln(.1)/ln(3/4) = approx. 8} seconds.  The effect is that
 @var{recent_cpu} estimates the amount of CPU time the thread has
 received ``recently,'' with the rate of decay inversely proportional to
 the number of threads competing for the CPU.
 
-Assumptions made by some of the tests require that updates to
+Assumptions made by some of the tests require that these recalculations of
 @var{recent_cpu} be made exactly when the system tick counter reaches a
 multiple of a second, that is, when @code{timer_ticks () % TIMER_FREQ ==
 0}, and not at any other time.