1990/0330/port/devkprof.c (diff list | history)

1990/03292/sys/src/9/port/devkprof.c:1,15 – 1990/0330/sys/src/9/port/devkprof.c:1,11 (short | long | prev | next)
1990/03292		#include "syslibc.h" #include "lock.h" #include "mem.h" #include "chan.h" #include "proc.h" #include "user.h" #include "errno.h" #include "dev.h" #include "misc.h" #include "lint.h"
1990/0330		#include "u.h" #include "lib.h" #include "mem.h" #include "dat.h" #include "fns.h" #include "errno.h"
1990/03292		#include "devtab.h"
1990/0330		#include "devtab.h"
1990/03292		#define MAXPC (100*1024L) #define RES 8
1990/03292/sys/src/9/port/devkprof.c:28,42 – 1990/0330/sys/src/9/port/devkprof.c:24,44
1990/03292		Kprofmaxqid, }; Dirtab kproftab[Nkproftab]={ "kpdata", Kprofdataqid, NBUF*sizeof timerbuf[0], "kpstart", Kprofstartqid, 0, "kpstartclr", Kprofstartclrqid, 0, "kpstop", Kprofstopqid, 0,
1990/0330		"kpdata", Kprofdataqid, NBUF*sizeof timerbuf[0], 0600, "kpstart", Kprofstartqid, 0, 0600, "kpstartclr", Kprofstartclrqid, 0, 0600, "kpstop", Kprofstopqid, 0, 0600,
1990/03292		}; void
1990/0330		kprofreset(void) { } void
1990/03292		kprofinit(void) {
1990/0330		extern void *etext;
1990/03292		if((((unsigned long)&etext)-KTZERO)>MAXPC) print("kernel profiling limited to %lud\n", MAXPC); }
1990/03292/sys/src/9/port/devkprof.c:44,55 – 1990/0330/sys/src/9/port/devkprof.c:46,57
1990/03292		Chan * kprofattach(char *spec) { return devattach('k', spec);
1990/0330		return devattach('t', spec);
1990/03292		} Chan * kprofclone(Chan *c, Chan *nc) { return devclone('k', c, nc);
1990/0330		return devclone(c, nc);
1990/03292		} int
1990/03292/sys/src/9/port/devkprof.c:59,81 – 1990/0330/sys/src/9/port/devkprof.c:61,81
1990/03292		} void kprofstat(Chan *c, Dir *db)
1990/0330		kprofstat(Chan *c, char *db)
1990/03292		{ devstat(c, db, kproftab, (long)Nkproftab, devgen); } Chan * kprofopen(Chan *c, int omode, int amode)
1990/0330		kprofopen(Chan *c, int omode)
1990/03292		{ if(amode==Aattach) return c; omode&=~Otrunc; if(omode==Oexecute) errjmp(Eperm); if(((c->qid&CHDIR) || c->qid==Kprofdataqid) && omode!=Oread) errjmp(Eisdir); c->mode=omode|OPEN; c->offset=0;
1990/0330		if(c->qid == CHDIR){ if(omode != OREAD) error(0, Eperm); } c->mode = openmode(omode); c->flag |= COPEN; c->offset = 0;
1990/03292		return c; }
1990/03292/sys/src/9/port/devkprof.c:82,129 – 1990/0330/sys/src/9/port/devkprof.c:82,132
1990/03292		void kprofcreate(Chan *c, char *name, int omode, ulong perm) { Unused(c); Unused(name); Unused(omode); Unused(perm); devunk();
1990/0330		error(0, Eperm);
1990/03292		} void kprofremove(Chan *c) { Unused(c); devunk();
1990/0330		error(0, Eperm);
1990/03292		} void kprofwstat(Chan *c, Dir *dp)
1990/0330		kprofwstat(Chan *c, char *dp)
1990/03292		{ Unused(c); Unused(dp); devunk();
1990/0330		error(0, Eperm);
1990/03292		} void kprofclose(Chan *c) { Unused(c); }
1990/0330		void kprofuserstr(Error *e, char *buf) { consuserstr(e, buf); } void kproferrstr(Error *e, char *buf) { rooterrstr(e, buf); }
1990/03292		long kprofread(Chan *c, char *a, long n)
1990/0330		kprofread(Chan *c, void *a, long n)
1990/03292		{ switch((int)(c->qid&~CHDIR)){ case Kprofdirqid: return devdirread(c, a, n, kproftab, (long)Nkproftab, devgen); break;
1990/0330		return devdirread(c, a, n, kproftab, Nkproftab, devgen);
1990/03292		case Kprofdataqid: if(c->offset>=NBUF*sizeof timerbuf[0]){ n=0;
1990/0330		if(c->offset >= NBUF*sizeof timerbuf[0]){ n = 0;
1990/03292		break; } if(c->offset+n>NBUF*sizeof timerbuf[0]) n=NBUF*sizeof timerbuf[0]-c->offset;
1990/0330		if(c->offset+n > NBUF*sizeof timerbuf[0]) n = NBUF*sizeof timerbuf[0]-c->offset;
1990/03292		memcpy(a, ((char *)timerbuf)+c->offset, n); break; default:
1990/03292/sys/src/9/port/devkprof.c:130,136 – 1990/0330/sys/src/9/port/devkprof.c:133,138
1990/03292		n=0; break; } c->offset+=n; return n; }
1990/03292/sys/src/9/port/devkprof.c:137,156 – 1990/0330/sys/src/9/port/devkprof.c:139,156
1990/03292		long kprofwrite(Chan *c, char *a, long n) { Unused(a); switch((int)(c->qid&~CHDIR)){ case Kprofstartclrqid: memset((char *)timerbuf, 0, NBUF*sizeof timerbuf[0]); case Kprofstartqid: consstarttimer();
1990/0330		duartstarttimer();
1990/03292		break; case Kprofstopqid: consstoptimer();
1990/0330		duartstoptimer();
1990/03292		break; default: devunk();
1990/0330		error(0, Ebadusefd);
1990/03292		} c->offset+=n; return n; }
1990/03292/sys/src/9/port/devkprof.c:159,166 – 1990/0330/sys/src/9/port/devkprof.c:159,166
1990/03292		{ timerbuf[0]++; if(KTZERO<=pc && pc<KTZERO+MAXPC){ pc-=KTZERO; pc>>=LRES;
1990/0330		pc -= KTZERO; pc >>= LRES;
1990/03292		timerbuf[pc]++; } }