[src/trunk]: src/sys/sys Add KERNHIST_CALLARGS and make the delay tunable (KE...

[matt <matt%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/7918c290c4f6
branches:  trunk
changeset: 785024:7918c290c4f6
user:      matt <matt%NetBSD.org@localhost>
date:      Tue Feb 19 00:56:25 2013 +0000

description:
Add KERNHIST_CALLARGS and make the delay tunable (KERNHIST_DELAY)

diffstat:

 sys/sys/kernhist.h |  22 +++++++++++++++++++---
 1 files changed, 19 insertions(+), 3 deletions(-)

diffs (59 lines):

diff -r 17ce2dc94233 -r 7918c290c4f6 sys/sys/kernhist.h
--- a/sys/sys/kernhist.h        Tue Feb 19 00:54:47 2013 +0000
+++ b/sys/sys/kernhist.h        Tue Feb 19 00:56:25 2013 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: kernhist.h,v 1.5 2012/07/30 23:56:48 matt Exp $        */
+/*     $NetBSD: kernhist.h,v 1.6 2013/02/19 00:56:25 matt Exp $        */
 
 /*
  * Copyright (c) 1997 Charles D. Cranor and Washington University.
@@ -97,6 +97,7 @@
 #define KERNHIST_INIT(NAME,N)
 #define KERNHIST_INIT_STATIC(NAME,BUF)
 #define KERNHIST_LOG(NAME,FMT,A,B,C,D)
+#define KERNHIST_CALLARGS(NAME,FMT,A,B,C,D)
 #define KERNHIST_CALLED(NAME)
 #define KERNHIST_FUNC(FNAME)
 #define kernhist_dump(NAME)
@@ -132,13 +133,18 @@
        LIST_INSERT_HEAD(&kern_histories, &(NAME), list); \
 } while (/*CONSTCOND*/ 0)
 
+#ifndef KERNHIST_DELAY
+#define KERNHIST_DELAY 100000
+#endif
+
 #if defined(KERNHIST_PRINT)
 extern int kernhist_print_enabled;
 #define KERNHIST_PRINTNOW(E) \
 do { \
                if (kernhist_print_enabled) { \
                        kernhist_entry_print(E); \
-                       DELAY(100000); \
+                       if (KERNHISTDELAY != 0) \
+                               DELAY(KERNHIST_DELAY); \
                } \
 } while (/*CONSTCOND*/ 0)
 #else
@@ -174,10 +180,20 @@
        KERNHIST_LOG(NAME, "called!", 0, 0, 0, 0); \
 } while (/*CONSTCOND*/ 0)
 
+/*
+ * This extends kernhist to avoid wasting a separate "called!" entry on every
+ * function.
+ */
+#define KERNHIST_CALLARGS(NAME, FMT, A, B, C, D) \
+do { \
+       _kernhist_call = atomic_inc_uint_nv(&_kernhist_cnt); \
+       KERNHIST_LOG(NAME, "called: "FMT, (A), (B), (C), (D)); \
+} while (/*CONSTCOND*/ 0)
+
 #define KERNHIST_FUNC(FNAME) \
        static unsigned int _kernhist_cnt = 0; \
        static const char *const _kernhist_name = FNAME; \
-       int _kernhist_call = 0;
+       unsigned int _kernhist_call = 0;
 
 static inline void kernhist_entry_print(const struct kern_history_ent *);