1 |
< |
/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
1 |
> |
/* Copyright (c) 1999 Silicon Graphics, Inc. */ |
2 |
|
|
3 |
|
#ifndef lint |
4 |
|
static char SCCSid[] = "$SunId$ SGI"; |
21 |
|
#ifndef PCTFREE |
22 |
|
#define PCTFREE 15 /* maximum fraction to free (%) */ |
23 |
|
#endif |
24 |
< |
#ifndef MAXFRAG |
25 |
< |
#define MAXFRAG 32767 /* maximum fragments/file to track (0==inf) */ |
24 |
> |
#ifndef MAXFRAGB |
25 |
> |
#define MAXFRAGB 16 /* fragment blocks/file to track (0==inf) */ |
26 |
|
#endif |
27 |
+ |
#ifndef FF_DEFAULT |
28 |
+ |
/* when to free a beam fragment */ |
29 |
+ |
#define FF_DEFAULT (FF_ALLOC|FF_WRITE|FF_KILL) |
30 |
+ |
#endif |
31 |
+ |
#ifndef MINDIRSEL |
32 |
+ |
/* minimum directory seek length */ |
33 |
+ |
#define MINDIRSEL (4*BUFSIZ/sizeof(BEAMI)) |
34 |
+ |
#endif |
35 |
|
|
36 |
|
#ifndef BSD |
37 |
|
#define write writebuf /* safe i/o routines */ |
38 |
|
#define read readbuf |
39 |
|
#endif |
40 |
|
|
41 |
< |
#define FRAGBLK 256 /* number of fragments to allocate at a time */ |
41 |
> |
#define FRAGBLK 512 /* number of fragments to allocate at a time */ |
42 |
|
|
43 |
+ |
int hdfragflags = FF_DEFAULT; /* tells when to free fragments */ |
44 |
|
unsigned hdcachesize = CACHESIZE*1024*1024; /* target cache size */ |
45 |
< |
unsigned long hdclock; /* clock value */ |
45 |
> |
unsigned long hdclock; /* clock value */ |
46 |
|
|
47 |
|
HOLO *hdlist[HDMAX+1]; /* holodeck pointers (NULL term.) */ |
48 |
|
|
213 |
|
} |
214 |
|
copystruct(hp->dirseg+j, hp->dirseg+(j-1)); |
215 |
|
} |
216 |
< |
mindist = nbeams(hp); /* find closest neighbors */ |
217 |
< |
for (j = hp->dirty; --j; ) |
218 |
< |
if (hp->dirseg[j].s - (hp->dirseg[j-1].s + hp->dirseg[j-1].n) |
219 |
< |
< mindist) { |
220 |
< |
mindist = hp->dirseg[j].s - |
216 |
> |
do { /* check neighbors */ |
217 |
> |
mindist = nbeams(hp); /* find closest */ |
218 |
> |
for (j = hp->dirty; --j; ) |
219 |
> |
if (hp->dirseg[j].s - |
220 |
> |
(hp->dirseg[j-1].s + hp->dirseg[j-1].n) |
221 |
> |
< mindist) { |
222 |
> |
minpos = j; |
223 |
> |
mindist = hp->dirseg[j].s - |
224 |
|
(hp->dirseg[j-1].s + hp->dirseg[j-1].n); |
225 |
< |
minpos = j; |
226 |
< |
} |
227 |
< |
if (hp->dirty > MAXDIRSE || mindist <= BUFSIZ/sizeof(BEAMI)) { |
225 |
> |
} |
226 |
> |
/* good enough? */ |
227 |
> |
if (hp->dirty <= MAXDIRSE && mindist > MINDIRSEL) |
228 |
> |
break; |
229 |
|
j = minpos - 1; /* coalesce neighbors */ |
230 |
|
if (hp->dirseg[j].s + hp->dirseg[j].n < |
231 |
< |
hp->dirseg[minpos].s + hp->dirseg[minpos].n) { |
231 |
> |
hp->dirseg[minpos].s + hp->dirseg[minpos].n) |
232 |
|
hp->dirseg[j].n = hp->dirseg[minpos].s + |
233 |
|
hp->dirseg[minpos].n - hp->dirseg[j].s; |
234 |
< |
} |
235 |
< |
hp->dirty--; /* close the gap */ |
223 |
< |
for (j = minpos; j < hp->dirty; j++) |
234 |
> |
hp->dirty--; |
235 |
> |
while (++j < hp->dirty) /* close the gap */ |
236 |
|
copystruct(hp->dirseg+j, hp->dirseg+(j+1)); |
237 |
< |
} |
237 |
> |
} while (mindist <= MINDIRSEL); |
238 |
|
} |
239 |
|
|
240 |
|
|
354 |
|
RAYVAL *p; |
355 |
|
int n; |
356 |
|
|
357 |
< |
if (nr <= 0) |
358 |
< |
return(NULL); |
359 |
< |
if (i < 1 | i > nbeams(hp)) |
348 |
< |
error(CONSISTENCY, "bad beam index given to hdnewrays"); |
357 |
> |
if (nr <= 0) return(NULL); |
358 |
> |
CHECK(i < 1 | i > nbeams(hp), |
359 |
> |
CONSISTENCY, "bad beam index given to hdnewrays"); |
360 |
|
if (hp->bl[i] != NULL) |
361 |
|
hp->bl[i]->tick = hdclock; /* preempt swap */ |
362 |
|
if (hdcachesize > 0 && hdmemuse(0) >= hdcachesize) |
365 |
|
n = hp->bi[i].nrd + nr; |
366 |
|
hp->bl[i] = (BEAM *)hdrealloc(NULL, hdbsiz(n), "hdnewrays"); |
367 |
|
blglob(hp)->nrm += n; |
368 |
< |
if (n = hp->bl[i]->nrm = hp->bi[i].nrd) { |
368 |
> |
if ((n = hp->bl[i]->nrm = hp->bi[i].nrd)) { |
369 |
|
errno = 0; |
370 |
|
if (lseek(hp->fd, hp->bi[i].fo, 0) < 0) |
371 |
|
error(SYSTEM, "seek error on holodeck file"); |
379 |
|
hdbsiz(hp->bl[i]->nrm + nr), "hdnewrays"); |
380 |
|
blglob(hp)->nrm += nr; |
381 |
|
} |
382 |
+ |
if (hdfragflags&FF_ALLOC && hp->bi[i].nrd) |
383 |
+ |
hdfreefrag(hp, i); /* relinquish old fragment */ |
384 |
|
p = hdbray(hp->bl[i]) + hp->bl[i]->nrm; |
385 |
|
hp->bl[i]->nrm += nr; /* update in-core structure */ |
386 |
|
bzero((char *)p, nr*sizeof(RAYVAL)); |
396 |
|
{ |
397 |
|
register int n; |
398 |
|
|
399 |
< |
if (i < 1 | i > nbeams(hp)) |
400 |
< |
error(CONSISTENCY, "bad beam index given to hdgetbeam"); |
399 |
> |
CHECK(i < 1 | i > nbeams(hp), |
400 |
> |
CONSISTENCY, "bad beam index given to hdgetbeam"); |
401 |
|
if (hp->bl[i] == NULL) { /* load from disk */ |
402 |
|
if (!(n = hp->bi[i].nrd)) |
403 |
|
return(NULL); |
411 |
|
n *= sizeof(RAYVAL); |
412 |
|
if (read(hp->fd, (char *)hdbray(hp->bl[i]), n) != n) |
413 |
|
error(SYSTEM, "error reading beam from holodeck file"); |
414 |
+ |
if (hdfragflags&FF_READ) |
415 |
+ |
hdfreefrag(hp, i); /* relinquish old frag. */ |
416 |
|
} |
417 |
|
blglob(hp)->tick = hp->bl[i]->tick = hdclock++; /* update LRU clock */ |
418 |
|
return(hp->bl[i]); |
450 |
|
/* precheck consistency */ |
451 |
|
if (n <= 0) return; |
452 |
|
for (i = n; i--; ) |
453 |
< |
if (hb[i].h == NULL || hb[i].b < 1 | hb[i].b > nbeams(hb[i].h)) |
453 |
> |
if (hb[i].h==NULL || hb[i].b<1 | hb[i].b>nbeams(hb[i].h)) |
454 |
|
error(CONSISTENCY, "bad beam in hdloadbeams"); |
455 |
|
/* sort list for optimal access */ |
456 |
|
qsort((char *)hb, n, sizeof(HDBEAMI), hdfilord); |
483 |
|
} |
484 |
|
|
485 |
|
|
486 |
< |
hdfreefrag(fd, bi) /* free a file fragment */ |
487 |
< |
int fd; |
488 |
< |
register BEAMI *bi; |
486 |
> |
int |
487 |
> |
hdfreefrag(hp, i) /* free a file fragment */ |
488 |
> |
HOLO *hp; |
489 |
> |
int i; |
490 |
|
{ |
491 |
+ |
register BEAMI *bi = &hp->bi[i]; |
492 |
|
register struct fraglist *f; |
493 |
|
register int j, k; |
494 |
|
|
495 |
< |
if (bi->nrd == 0) |
496 |
< |
return; |
497 |
< |
#ifdef DEBUG |
498 |
< |
if (fd < 0 | fd >= nhdfragls || !hdfragl[fd].nlinks) |
499 |
< |
error(CONSISTENCY, "bad file descriptor in hdfreefrag"); |
483 |
< |
#endif |
484 |
< |
f = &hdfragl[fd]; |
495 |
> |
if (bi->nrd <= 0) |
496 |
> |
return(0); |
497 |
> |
DCHECK(hp->fd < 0 | hp->fd >= nhdfragls || !hdfragl[hp->fd].nlinks, |
498 |
> |
CONSISTENCY, "bad file descriptor in hdfreefrag"); |
499 |
> |
f = &hdfragl[hp->fd]; |
500 |
|
if (f->nfrags % FRAGBLK == 0) { /* delete empty remnants */ |
501 |
|
for (j = k = 0; k < f->nfrags; j++, k++) { |
502 |
|
while (f->fi[k].nrd == 0) |
509 |
|
f->nfrags = j; |
510 |
|
} |
511 |
|
j = f->nfrags++; /* allocate a slot in free list */ |
512 |
< |
#if MAXFRAG |
513 |
< |
if (j >= MAXFRAG-1) |
514 |
< |
f->nfrags--; |
512 |
> |
#if MAXFRAGB |
513 |
> |
if (j >= MAXFRAGB*FRAGBLK) { |
514 |
> |
f->nfrags = j--; /* stop list growth */ |
515 |
> |
if (bi->nrd <= f->fi[j].nrd) |
516 |
> |
return(0); /* new one no better than discard */ |
517 |
> |
} |
518 |
|
#endif |
519 |
< |
if (j % FRAGBLK == 0) { /* more free list space */ |
519 |
> |
if (j % FRAGBLK == 0) { /* more (or less) free list space */ |
520 |
|
register BEAMI *newp; |
521 |
|
if (f->fi == NULL) |
522 |
|
newp = (BEAMI *)malloc((j+FRAGBLK)*sizeof(BEAMI)); |
525 |
|
(j+FRAGBLK)*sizeof(BEAMI)); |
526 |
|
if (newp == NULL) { |
527 |
|
f->nfrags--; /* graceful failure */ |
528 |
< |
return; |
528 |
> |
return(0); |
529 |
|
} |
530 |
|
f->fi = newp; |
531 |
|
} |
552 |
|
} |
553 |
|
break; |
554 |
|
} |
555 |
+ |
biglob(hp)->nrd -= bi->nrd; /* tell fragment it's free */ |
556 |
+ |
bi->nrd = 0; |
557 |
+ |
bi->fo = 0; |
558 |
+ |
return(1); |
559 |
|
} |
560 |
|
|
561 |
|
|
562 |
+ |
int |
563 |
+ |
hdfragOK(fd, listlen, listsiz) /* get fragment list status for file */ |
564 |
+ |
int fd; |
565 |
+ |
int *listlen; |
566 |
+ |
register int4 *listsiz; |
567 |
+ |
{ |
568 |
+ |
register struct fraglist *f; |
569 |
+ |
register int i; |
570 |
+ |
|
571 |
+ |
if (fd < 0 | fd >= nhdfragls || !(f = &hdfragl[fd])->nlinks) |
572 |
+ |
return(0); /* listless */ |
573 |
+ |
if (listlen != NULL) |
574 |
+ |
*listlen = f->nfrags; |
575 |
+ |
if (listsiz != NULL) |
576 |
+ |
for (i = f->nfrags, *listsiz = 0; i--; ) |
577 |
+ |
*listsiz += f->fi[i].nrd; |
578 |
+ |
#if MAXFRAGB |
579 |
+ |
return(f->nfrags < MAXFRAGB*FRAGBLK); |
580 |
+ |
#else |
581 |
+ |
return(1); /* list never fills up */ |
582 |
+ |
#endif |
583 |
+ |
} |
584 |
+ |
|
585 |
+ |
|
586 |
|
long |
587 |
|
hdallocfrag(fd, nrays) /* allocate a file fragment */ |
588 |
|
int fd; |
589 |
|
unsigned int4 nrays; |
590 |
|
{ |
591 |
|
register struct fraglist *f; |
592 |
< |
register int j, k; |
592 |
> |
register int j; |
593 |
|
long nfo; |
594 |
|
|
595 |
|
if (nrays == 0) |
596 |
|
return(-1L); |
597 |
< |
#ifdef DEBUG |
598 |
< |
if (fd < 0 | fd >= nhdfragls || !hdfragl[fd].nlinks) |
553 |
< |
error(CONSISTENCY, "bad file descriptor in hdallocfrag"); |
554 |
< |
#endif |
597 |
> |
DCHECK(fd < 0 | fd >= nhdfragls || !hdfragl[fd].nlinks, |
598 |
> |
CONSISTENCY, "bad file descriptor in hdallocfrag"); |
599 |
|
f = &hdfragl[fd]; |
600 |
< |
k = -1; /* find closest-sized fragment */ |
601 |
< |
for (j = f->nfrags; j-- > 0; ) |
602 |
< |
if (f->fi[j].nrd >= nrays && |
603 |
< |
(k < 0 || f->fi[j].nrd < f->fi[k].nrd)) |
560 |
< |
if (f->fi[k=j].nrd == nrays) |
561 |
< |
break; |
562 |
< |
if (k < 0) { /* no fragment -- extend file */ |
600 |
> |
for (j = f->nfrags; j-- > 0; ) /* first fit algorithm */ |
601 |
> |
if (f->fi[j].nrd >= nrays) |
602 |
> |
break; |
603 |
> |
if (j < 0) { /* no fragment -- extend file */ |
604 |
|
nfo = f->flen; |
605 |
|
f->flen += nrays*sizeof(RAYVAL); |
606 |
|
} else { /* else use fragment */ |
607 |
< |
nfo = f->fi[k].fo; |
608 |
< |
f->fi[k].fo += nrays*sizeof(RAYVAL); |
609 |
< |
f->fi[k].nrd -= nrays; |
607 |
> |
nfo = f->fi[j].fo; |
608 |
> |
f->fi[j].fo += nrays*sizeof(RAYVAL); |
609 |
> |
f->fi[j].nrd -= nrays; |
610 |
|
} |
611 |
|
return(nfo); |
612 |
|
} |
623 |
|
/* check file status */ |
624 |
|
if (hdfragl[hp->fd].writerr) |
625 |
|
return(-1); |
626 |
< |
#ifdef DEBUG |
627 |
< |
if (i < 1 | i > nbeams(hp)) |
587 |
< |
error(CONSISTENCY, "bad beam index in hdsyncbeam"); |
588 |
< |
#endif |
626 |
> |
DCHECK(i < 1 | i > nbeams(hp), |
627 |
> |
CONSISTENCY, "bad beam index in hdsyncbeam"); |
628 |
|
/* is current fragment OK? */ |
629 |
|
if (hp->bl[i] == NULL || (nrays = hp->bl[i]->nrm) == hp->bi[i].nrd) |
630 |
|
return(0); |
631 |
< |
if (hp->bi[i].nrd) /* relinquish old fragment */ |
632 |
< |
hdfreefrag(hp->fd, &hp->bi[i]); |
631 |
> |
if (hdfragflags&FF_WRITE && hp->bi[i].nrd) |
632 |
> |
hdfreefrag(hp, i); /* relinquish old fragment */ |
633 |
|
if (nrays) { /* get and write new fragment */ |
634 |
|
nfo = hdallocfrag(hp->fd, nrays); |
635 |
|
errno = 0; |
644 |
|
hp->bi[i].fo = nfo; |
645 |
|
} else |
646 |
|
hp->bi[i].fo = 0L; |
647 |
< |
biglob(hp)->nrd += nrays - hp->bi[i].nrd; |
609 |
< |
hp->bi[i].nrd = nrays; |
647 |
> |
biglob(hp)->nrd += hp->bi[i].nrd = nrays; |
648 |
|
markdirty(hp, i); /* section directory now out of date */ |
649 |
|
return(1); |
650 |
|
} |
672 |
|
nchanged += hdfreebeam(hp, i); |
673 |
|
return(nchanged); |
674 |
|
} |
675 |
< |
#ifdef DEBUG |
676 |
< |
if (i < 1 | i > nbeams(hp)) |
639 |
< |
error(CONSISTENCY, "bad beam index to hdfreebeam"); |
640 |
< |
#endif |
675 |
> |
DCHECK(i < 1 | i > nbeams(hp), |
676 |
> |
CONSISTENCY, "bad beam index to hdfreebeam"); |
677 |
|
if (hp->bl[i] == NULL) |
678 |
|
return(0); |
679 |
|
/* check for additions */ |
692 |
|
register HOLO *hp; |
693 |
|
register int i; |
694 |
|
{ |
659 |
– |
static BEAM emptybeam; |
695 |
|
int nchanged; |
696 |
|
|
697 |
|
if (hp == NULL) { /* clobber all holodecks */ |
705 |
|
for (i = nbeams(hp); i > 0; i--) |
706 |
|
if (hp->bi[i].nrd > 0 || hp->bl[i] != NULL) |
707 |
|
nchanged += hdkillbeam(hp, i); |
708 |
< |
#ifdef DEBUG |
709 |
< |
if (biglob(hp)->nrd != 0 | blglob(hp)->nrm != 0) |
675 |
< |
error(CONSISTENCY, "bad beam count in hdkillbeam"); |
676 |
< |
#endif |
708 |
> |
DCHECK(biglob(hp)->nrd != 0 | blglob(hp)->nrm != 0, |
709 |
> |
CONSISTENCY, "bad beam count in hdkillbeam"); |
710 |
|
return(nchanged); |
711 |
|
} |
712 |
< |
#ifdef DEBUG |
713 |
< |
if (i < 1 | i > nbeams(hp)) |
681 |
< |
error(CONSISTENCY, "bad beam index to hdkillbeam"); |
682 |
< |
#endif |
712 |
> |
DCHECK(i < 1 | i > nbeams(hp), |
713 |
> |
CONSISTENCY, "bad beam index to hdkillbeam"); |
714 |
|
if (hp->bl[i] != NULL) { /* free memory */ |
715 |
|
blglob(hp)->nrm -= nchanged = hp->bl[i]->nrm; |
716 |
|
free((char *)hp->bl[i]); |
717 |
|
} else |
718 |
|
nchanged = hp->bi[i].nrd; |
719 |
< |
if (hp->bi[i].nrd) { /* free file fragment */ |
720 |
< |
hp->bl[i] = &emptybeam; |
721 |
< |
hdsyncbeam(hp, i); |
719 |
> |
if (hp->bi[i].nrd) { |
720 |
> |
if (hdfragflags&FF_KILL) |
721 |
> |
hdfreefrag(hp, i); |
722 |
> |
hp->bi[i].nrd = 0; /* make sure it's gone */ |
723 |
> |
hp->bi[i].fo = 0L; |
724 |
|
} |
725 |
|
hp->bl[i] = NULL; |
726 |
|
return(nchanged); |