0.6.12.49:

[sbcl.git] / src / code / profile.lisp

diff --git a/src/code/profile.lisp b/src/code/profile.lisp
index a381821..524b5fd 100644 (file)
--- a/src/code/profile.lisp
+++ b/src/code/profile.lisp
@@ -94,6 +94,7 @@
   (total (required-argument) :type single-float :read-only t))
 (defvar *overhead*)
 (declaim (type overhead *overhead*))
+(makunbound '*overhead*) ; in case we reload this file when tweaking
 \f
 ;;;; profile encapsulations
 
@@ -176,26 +177,34 @@
                    ;; that as long as we only cons small amounts,
                    ;; we'll almost always just do fixnum arithmetic.
                    ;; (And for encapsulated functions which cons
-                   ;; large amounts, then we don't much care about a
-                   ;; single extra consed bignum.)
-                   (start-consing-integer (pcounter-integer nbf-pcounter))
-                   (start-consing-fixnum (pcounter-fixnum nbf-pcounter)))
+                   ;; large amounts, then a single extra consed
+                   ;; bignum tends to be proportionally negligible.)
+                   (nbf0-integer (pcounter-integer nbf-pcounter))
+                   (nbf0-fixnum (pcounter-fixnum nbf-pcounter))
+                   (dynamic-usage-0 (sb-kernel:dynamic-usage)))
               (declare (inline pcounter-or-fixnum->integer))
               (multiple-value-prog1
                   (multiple-value-call encapsulated-fun
                                        (sb-c:%more-arg-values arg-context
                                                               0
                                                               arg-count))
-                (let ((*computing-profiling-data-for* encapsulated-fun))
+                (let ((*computing-profiling-data-for* encapsulated-fun)
+                      (dynamic-usage-1 (sb-kernel:dynamic-usage)))
                   (setf dticks (fastbig- (get-internal-ticks) start-ticks))
                   (setf dconsing
-                        (if (eq (pcounter-integer nbf-pcounter)
-                                start-consing-integer)
-                            (- (pcounter-fixnum nbf-pcounter)
-                               start-consing-fixnum)
+                        (if (and (eq (pcounter-integer nbf-pcounter)
+                                     nbf0-integer)
+                                 (eq (pcounter-fixnum nbf-pcounter)
+                                     nbf0-fixnum))
+                            ;; common special case where we can avoid
+                            ;; bignum arithmetic
+                            (- dynamic-usage-1
+                               dynamic-usage-0)
+                            ;; general case
                             (- (get-bytes-consed)
-                               (+ (pcounter-integer nbf-pcounter)
-                                  (pcounter-fixnum nbf-pcounter)))))
+                               nbf0-integer
+                               nbf0-fixnum
+                               dynamic-usage-0)))
                   (setf inner-enclosed-profiles
                         (pcounter-or-fixnum->integer *enclosed-profiles*))
                   (let ((net-dticks (fastbig- dticks *enclosed-ticks*)))
@@ -445,7 +454,7 @@ Lisp process."
 ;;; that I (WHN) use for my own experimentation, but it might
 ;;; become supported someday. Comments?)
 (declaim (type unsigned-byte *timer-overhead-iterations*))
-(defvar *timer-overhead-iterations*
+(defparameter *timer-overhead-iterations*
   500000)
 
 ;;; a dummy function that we profile to find profiling overhead