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Research V7 development
[unix-history] / usr / src / cmd / prof.c
/*
* Print execution profile
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <a.out.h>
typedef short UNIT; /* unit of profiling */
struct stat stbuf;
struct nl {
char name[8];
unsigned value;
float time;
long ncall;
};
struct hdr {
UNIT *lowpc;
UNIT *highpc;
int ncount;
};
struct nl nl[1200];
struct cnt {
unsigned cvalue;
long cncall;
} cbuf[350];
FILE *pfile, *nfile;
unsigned highpc;
unsigned lowpc;
double ransca;
double ranoff;
unsigned pcl;
unsigned pch;
unsigned bufs;
int nname;
double ftime;
double actime;
double totime;
double maxtime;
double scale;
double lastx;
double lasty;
struct nl *np;
struct nl *npe;
int aflg;
int vflg;
int lflg;
long symoff;
main(argc, argv)
char **argv;
{
char *namfil;
int timcmp(), valcmp();
int i, overlap;
long pfpos;
double lastsx;
struct cnt *cp;
double tx, ty;
struct exec xbuf;
struct hdr h;
lowpc = -1;
highpc = -1;
argv++;
namfil = "a.out";
while (argc>1) {
if (**argv == '-') {
if (*++*argv == 'l')
lflg++;
if (**argv == 'a')
aflg = 040;
if(**argv == 'v')
vflg++;
if(**argv >= '0' && **argv <= '9') {
i = atoi(*argv);
if(lowpc == -1)
lowpc = i;
else
highpc = i;
}
} else
namfil = *argv;
argc--;
argv++;
}
if (lowpc >= 100)
lowpc = 0;
if(highpc <= lowpc || highpc > 100)
highpc = 100;
ransca = 100./(highpc-lowpc);
ranoff = 2040. + 40.8*lowpc*ransca;
if((nfile=fopen(namfil,"r"))==NULL) {
fprintf(stderr, "%s: not found\n", namfil);
done();
}
fread((char *)&xbuf, 1, sizeof(xbuf), nfile);
if (xbuf.a_magic!=A_MAGIC1 && xbuf.a_magic!=A_MAGIC2 && xbuf.a_magic!=A_MAGIC3) {
fprintf(stderr, "%s: bad format\n", namfil);
done();
}
symoff = (long)xbuf.a_text + xbuf.a_data;
if ((xbuf.a_flag&01) == 0)
symoff *= 2;
fseek(nfile, symoff+sizeof(xbuf), 0);
if((pfile = fopen("mon.out","r")) == NULL) {
fprintf(stderr, "No mon.out\n");
done();
}
fstat(fileno(pfile), &stbuf);
fread((char *)&h, sizeof(struct hdr), 1, pfile);
lowpc = h.lowpc - (UNIT *)0;
highpc = h.highpc - (UNIT *)0;
bufs = stbuf.st_size - sizeof(struct hdr) - h.ncount*sizeof(struct cnt);
fread((char *)cbuf, sizeof(struct cnt), h.ncount, pfile);
pfpos = ftell(pfile);
npe = nl;
for (nname = 0; xbuf.a_syms > 0; xbuf.a_syms -= sizeof(struct nlist)) {
struct nlist nbuf;
fread((char *)&nbuf, sizeof(nbuf), 1, nfile);
if (nbuf.n_type!=N_TEXT && nbuf.n_type!=N_TEXT+N_EXT)
continue;
if (aflg==0 && nbuf.n_type!=N_TEXT+N_EXT)
continue;
npe->value = nbuf.n_value/sizeof(UNIT);
for (i=0; i<8; i++)
npe->name[i] = nbuf.n_name[i];
npe++;
nname++;
}
if (nname == 0) {
fprintf(stderr, "%s: no symbols\n", namfil);
done();
}
npe->value = -1;
npe++;
for (cp = cbuf; cp < &cbuf[h.ncount]; cp++)
for (np = nl; np < npe; np++)
if ((unsigned)(cp->cvalue/sizeof(UNIT) - np->value) <=10) {
np->ncall = cp->cncall;
break;
}
qsort(nl, nname, sizeof(struct nl), valcmp);
scale = highpc - lowpc;
scale /= bufs/sizeof(UNIT);
for(i=0;;i++) {
register j;
unsigned UNIT ccnt;
fread((char *)&ccnt, sizeof(ccnt), 1, pfile);
if(feof(pfile))
break;
if (ccnt == 0)
continue;
pcl = lowpc + scale*i;
pch = lowpc + scale*(i+1);
ftime = ccnt;
totime += ftime;
if(ftime > maxtime)
maxtime = ftime;
for (j=0; j<nname; j++) {
if (pch < nl[j].value)
break;
if (pcl >= nl[j+1].value)
continue;
overlap=(min(pch,nl[j+1].value)-max(pcl,nl[j].value));
nl[j].time += overlap*ftime/scale;
}
}
if (totime==0.0) {
fprintf(stderr, "No time accumulated\n");
done();
}
#ifdef plot
if(!vflg)
goto print;
openpl();
erase();
space(-2048, -2048, 2048, 2048);
line(-2040, -2040, -2040, 2040);
line(0, 2040, 0, -2040);
for(i=0; i<11; i++)
line(-2040, 2040-i*408, 0, 2040-i*408);
lastx = 0.;
lasty = ranoff;
scale = (4080.*ransca)/(bufs/sizeof(UNIT));
fclose(pfile); /*to turn off eof*/
pfile = fopen("mon.out", "r");
fseek(pfile, pfpos, 0);
lastsx = 0.0;
for(;;) {
unsigned UNIT ccnt;
fread((char *)&ccnt, sizeof(ccnt), 1, pfile);
if(feof(pfile))
break;
ftime = ccnt;
tx = lastsx;
ty = lasty;
lastsx -= 2000.*ftime/totime;
lasty -= scale;
if(lasty >= -2040. && ty <= 2040.) {
line((int)tx, (int)ty, (int)lastsx, (int)lasty);
if (ccnt!=0 || lastx!=0.0) {
tx = lastx;
lastx = -ftime*2000./maxtime;
ty += scale/2;
line(0, (int)ty, (int)tx, (int)ty);
}
}
}
scale = (4080.*ransca)/(highpc-lowpc);
lastx = 50.;
for(np = nl; np<npe; np++) {
if(np->value < lowpc)
continue;
if(np->value >= highpc)
continue;
ftime = np->time/totime;
lasty = ranoff - (np->value - lowpc)*scale;
if(lasty >= -2040. && lasty <= 2040.) {
char bufl[8+3], *namp;
register j;
line(0, (int)lasty, 50, (int)lasty);
line((int)(lastx-50),(int)lasty,(int)lastx,(int)lasty);
point((int)(lastx+30), (int)(lasty+10));
namp = bufl;
for(j=0; j<8; j++)
if(np->name[j] != '_')
*namp++ = np->name[j];
*namp++ = '\n';
*namp++ = 0;
label(bufl);
}
lastx += 500.;
if(lastx > 2000.)
lastx = 50.;
}
done();
print:
#endif
actime = 0;
printf(" name %%time cumsecs #call ms/call\n");
if (!lflg)
qsort(nl, nname, sizeof(struct nl), timcmp);
for (np = nl; np<npe-1; np++) {
ftime = np->time/totime;
actime += np->time;
printf("%8.8s%6.1f%9.2f", np->name, 100*ftime, actime/60);
if(np->ncall!=0) {
printf("%6ld", np->ncall);
printf(" %7.2f\n", np->time/(np->ncall*.06));
} else
printf("\n");
}
done();
}
min(a, b)
unsigned a, b;
{
if (a<b)
return(a);
return(b);
}
max(a, b)
unsigned a, b;
{
if (a>b)
return(a);
return(b);
}
valcmp(p1, p2)
struct nl *p1, *p2;
{
return(p1->value - p2->value);
}
timcmp(p1, p2)
struct nl *p1, *p2;
{
float d;
d = p2->time - p1->time;
if (d > 0.0)
return(1);
if (d < 0.0)
return(-1);
return(0);
}
done()
{
#ifdef plot
if(vflg) {
point(0, -2040);
closepl();
}
#endif
exit(0);
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.