New flag -u to suppress functions whose name does not begin with an

underscore.  Use it to avoid seeing badsw when profiling the kernel.

Print times more accurately (e.g. usec in %8.0f format instead of
msec in %8.2f format for averages) if hz >= 10000.  This should have
no effect now since profhz is only 1024.

1 files changed, 9 insertions, 2 deletions

diff --git a/usr.bin/gprof/gprof.1 b/usr.bin/gprof/gprof.1
index dfb0f21..63ea872 100644
--- a/usr.bin/gprof/gprof.1
+++ b/usr.bin/gprof/gprof.1
@@ -91,8 +91,8 @@ Second, a flat profile is given,
 similar to that provided by
 .Xr prof  1  .
 This listing gives the total execution times, the call counts,
-the time in milleseconds the call spent in the routine itself, and
-the time in milleseconds the call spent in the routine itself including
+the time in msec or usec the call spent in the routine itself, and
+the time in msec or usec the call spent in the routine itself including
 its descendents.
 .Pp
 Finally, an index of the function names is provided.
@@ -205,6 +205,13 @@ executions of gprof (probably also with a
 to accumulate profile data across several runs of an
 .Pa a.out
 file.
+.It Fl u
+Suppresses the printing of functions whose name does not begin with
+an underscore.
+All relevant information about such functions belongs to the
+(non-suppressed) function with the next lowest address.
+This is useful for eliminating "functions" that are just labels
+inside other functions.
 .It Fl z
 Displays routines that have zero usage (as shown by call counts
 and accumulated time).