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.
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c08d58eade
commit
e408eccfc7
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=20396
@ -31,7 +31,7 @@
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* SUCH DAMAGE.
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*
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* @(#)subr_prof.c 8.3 (Berkeley) 9/23/93
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* $Id: subr_prof.c,v 1.16 1995/12/29 15:29:08 bde Exp $
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* $Id: subr_prof.c,v 1.17 1996/10/17 19:32:18 bde Exp $
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*/
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#include <sys/param.h>
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@ -66,6 +66,8 @@ nullfunc_loop_profiled()
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nullfunc_profiled();
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}
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#define nullfunc_loop_profiled_end nullfunc_profiled /* XXX */
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void
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nullfunc_profiled()
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{
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@ -82,11 +84,11 @@ kmstartup(dummy)
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int cputime_overhead;
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int empty_loop_time;
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int i;
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fptrint_t kmstartup_addr;
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int mcount_overhead;
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int mexitcount_overhead;
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int nullfunc_loop_overhead;
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int nullfunc_loop_profiled_time;
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fptrint_t tmp_addr;
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#endif
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/*
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@ -175,11 +177,11 @@ kmstartup(dummy)
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#if defined(i386) && __GNUC__ >= 2
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asm("call mexitcount; 1:"
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: : : "ax", "bx", "cx", "dx", "memory");
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asm("movl $1b,%0" : "=rm" (kmstartup_addr));
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asm("movl $1b,%0" : "=rm" (tmp_addr));
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#else
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#error
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#endif
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mexitcount_overhead = KCOUNT(p, PC_TO_I(p, kmstartup_addr));
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mexitcount_overhead = KCOUNT(p, PC_TO_I(p, tmp_addr));
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p->state = GMON_PROF_OFF;
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stopguprof(p);
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@ -187,15 +189,10 @@ kmstartup(dummy)
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enable_intr();
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nullfunc_loop_profiled_time = 0;
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for (i = 0; i < 28; i += sizeof(HISTCOUNTER)) {
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int x;
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x = KCOUNT(p, PC_TO_I(p,
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(fptrint_t)nullfunc_loop_profiled + i));
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nullfunc_loop_profiled_time += x;
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printf("leaf[%d] = %d sum %d\n",
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i, x, nullfunc_loop_profiled_time);
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}
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for (tmp_addr = (fptrint_t)nullfunc_loop_profiled;
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tmp_addr < (fptrint_t)nullfunc_loop_profiled_end;
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tmp_addr += HISTFRACTION * sizeof(HISTCOUNTER))
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nullfunc_loop_profiled_time += KCOUNT(p, PC_TO_I(p, tmp_addr));
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#define CALIB_DOSCALE(count) (((count) + CALIB_SCALE / 3) / CALIB_SCALE)
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#define c2n(count, freq) ((int)((count) * 1000000000LL / freq))
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printf("cputime %d, empty_loop %d, nullfunc_loop_profiled %d, mcount %d, mexitcount %d\n",
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