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Fixed magic and wrong numbers in calibration of nullfunc_loop_profiled()

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and removed related debugging code.  Now this part of the calibration is
almost as machine-independent as gprof generally.
This commit is contained in:
Bruce Evans 1996-12-13 12:59:28 +00:00
parent c08d58eade
commit e408eccfc7
1 changed files with 10 additions and 13 deletions
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23
sys/kern/subr_prof.c
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@ -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",