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| author | bde <bde@FreeBSD.org> | 1996-12-13 12:59:28 +0000 |
|---|---|---|
| committer | bde <bde@FreeBSD.org> | 1996-12-13 12:59:28 +0000 |
| commit | 058682541ad2c4fa994749247cf441b15f5213d8 (patch) | |
| tree | c7adcb944a71bb3dafc3bf5ef66733cf062a4b0f /sys/kern/subr_prof.c | |
| parent | be904e56d59e6070063e1e9193e57203632b448d (diff) | |
| download | FreeBSD-src-058682541ad2c4fa994749247cf441b15f5213d8.zip FreeBSD-src-058682541ad2c4fa994749247cf441b15f5213d8.tar.gz | |
Fixed magic and wrong numbers in calibration of nullfunc_loop_profiled()
and removed related debugging code. Now this part of the calibration is
almost as machine-independent as gprof generally.
Diffstat (limited to 'sys/kern/subr_prof.c')
| -rw-r--r-- | sys/kern/subr_prof.c | 23 |
1 files changed, 10 insertions, 13 deletions
diff --git a/sys/kern/subr_prof.c b/sys/kern/subr_prof.c index d17a3b0..bce6b35 100644 --- a/sys/kern/subr_prof.c +++ b/sys/kern/subr_prof.c @@ -31,7 +31,7 @@ * SUCH DAMAGE. * * @(#)subr_prof.c 8.3 (Berkeley) 9/23/93 - * $Id: subr_prof.c,v 1.16 1995/12/29 15:29:08 bde Exp $ + * $Id: subr_prof.c,v 1.17 1996/10/17 19:32:18 bde Exp $ */ #include <sys/param.h> @@ -66,6 +66,8 @@ nullfunc_loop_profiled() nullfunc_profiled(); } +#define nullfunc_loop_profiled_end nullfunc_profiled /* XXX */ + void nullfunc_profiled() { @@ -82,11 +84,11 @@ kmstartup(dummy) int cputime_overhead; int empty_loop_time; int i; - fptrint_t kmstartup_addr; int mcount_overhead; int mexitcount_overhead; int nullfunc_loop_overhead; int nullfunc_loop_profiled_time; + fptrint_t tmp_addr; #endif /* @@ -175,11 +177,11 @@ kmstartup(dummy) #if defined(i386) && __GNUC__ >= 2 asm("call mexitcount; 1:" : : : "ax", "bx", "cx", "dx", "memory"); - asm("movl $1b,%0" : "=rm" (kmstartup_addr)); + asm("movl $1b,%0" : "=rm" (tmp_addr)); #else #error #endif - mexitcount_overhead = KCOUNT(p, PC_TO_I(p, kmstartup_addr)); + mexitcount_overhead = KCOUNT(p, PC_TO_I(p, tmp_addr)); p->state = GMON_PROF_OFF; stopguprof(p); @@ -187,15 +189,10 @@ kmstartup(dummy) enable_intr(); nullfunc_loop_profiled_time = 0; - for (i = 0; i < 28; i += sizeof(HISTCOUNTER)) { - int x; - - x = KCOUNT(p, PC_TO_I(p, - (fptrint_t)nullfunc_loop_profiled + i)); - nullfunc_loop_profiled_time += x; - printf("leaf[%d] = %d sum %d\n", - i, x, nullfunc_loop_profiled_time); - } + for (tmp_addr = (fptrint_t)nullfunc_loop_profiled; + tmp_addr < (fptrint_t)nullfunc_loop_profiled_end; + tmp_addr += HISTFRACTION * sizeof(HISTCOUNTER)) + nullfunc_loop_profiled_time += KCOUNT(p, PC_TO_I(p, tmp_addr)); #define CALIB_DOSCALE(count) (((count) + CALIB_SCALE / 3) / CALIB_SCALE) #define c2n(count, freq) ((int)((count) * 1000000000LL / freq)) printf("cputime %d, empty_loop %d, nullfunc_loop_profiled %d, mcount %d, mexitcount %d\n", |
