static void initialize_bands(struct dm_disk_if *d) {
int j;
double tmptime, rotblks;
struct dm_layout_g1 *l = (struct dm_layout_g1 *)d->layout;
return;
// Defunct. Cook up skews if none provided in model.
for (j = 0; j < l->bands_len; j++) {
double period;
// set tmptime to the greater of a headswitch for a read or a
// write
struct dm_mech_state s1 = {0,0,0}, s2 = {1,0,0};
dm_time_t t1 = d->mech->dm_seek_time(d, &s1, &s2, 0);
dm_time_t t2 = d->mech->dm_seek_time(d, &s1, &s2, 1);
tmptime = t1 > t2 ? t1 : t2;
period = dm_time_itod(d->mech->dm_period(d));
rotblks = ((double)l->bands[j].blkspertrack) / period;
// l->bands[j].firstblkangle = l->bands[j].firstblkangle / rotblks;
if (l->bands[j].trackskew == -1.0) {
ddbg_assert2(0, "unimplemented");
l->bands[j].trackskew = tmptime;
}
else if (l->bands[j].trackskew == -2.0) {
ddbg_assert2(0, "unimplemented");
tmptime = (double) ((int) (tmptime * rotblks + 0.999999999));
l->bands[j].trackskew = tmptime / rotblks;
}
else {
l->bands[j].trackskew = l->bands[j].trackskew;
}
// zero distance seek without a head switch
// write vs. read
// XXX ... based on disksim-pre3-28, every seek function returns
// zero seek time for a zero distance seek!
// tmptime = max(diskseektime(d, 1, 0, 0),
// diskseektime(d, 1, 0, 1));
tmptime = 0;
if (l->bands[j].cylskew == -1.0) {
ddbg_assert2(0, "unimplemented");
l->bands[j].cylskew = tmptime;
}
else if (l->bands[j].cylskew == -2.0) {
ddbg_assert2(0, "unimplemented");
tmptime = (double) ((int) (tmptime * rotblks + 0.99999999));
l->bands[j].cylskew = tmptime / rotblks;
}
else {
l->bands[j].cylskew = l->bands[j].cylskew;
}
}
}
static void DISKSIM_GLOBAL_STAT_DEFINITION_FILE_loader(int result, char *s) {
char *path = lp_search_path(lp_cwd, s);
if(!path) {
ddbg_assert2(0, "Couldn't find statdefs file in path");
}
else {
statdeffile = fopen(path, "r");
ddbg_assert2(statdeffile != 0, "failed to open statdefs file!");
}
}
static void
cachedev_wakeup_complete (struct cache_if *c,
void *d) // really struct cache_dev_event
{
struct cache_dev_event *desc = (struct cache_dev_event *)d;
struct cache_dev *cache = (struct cache_dev *)c;
ASSERT (0);
#ifdef DEBUG_CACHEDEV
fprintf (outputfile, "*** %f: Entered cachedev::cachedev_wakeup_complete (does nothing)\n", simtime );
#endif
// ???
#if 0
switch(desc->type) {
case CACHE_EVENT_READ:
cache_read_continue(cache, desc);
break;
case CACHE_EVENT_WRITE:
cache_write_continue(cache, desc);
break;
case CACHE_EVENT_FLUSH:
(*desc->donefunc)(desc->doneparam, desc->req);
addtoextraq((event *) desc);
break;
default:
ddbg_assert2(0, "Unknown cachedev event type");
break;
}
#endif
}
static void simpledisk_interrupt_complete (ioreq_event *curr)
{
#ifdef DEBUG_SIMPLEDISK
fprintf (outputfile, "*** %f: simpledisk_interrupt_complete - devno %d, blkno %d, bcount %d, flags 0x%x, cause %d\n", simtime, curr->devno, curr->blkno, curr->bcount, curr->flags, curr->cause );
#endif
switch (curr->cause) {
case RECONNECT:
simpledisk_reconnect_done(curr);
break;
case DISCONNECT:
simpledisk_disconnect_done(curr);
break;
case COMPLETION:
simpledisk_completion_done(curr);
break;
default:
ddbg_assert2(0, "bad event type");
break;
}
}
// assuming no activity, what will the state of the disk be
// at some time in the future
static void
dm_progress_g1(struct dm_disk_if *d,
struct dm_pbn *cur_state,
dm_time_t time,
struct dm_pbn *result_state)
{
ddbg_assert2(0, "unimplemented");
}
// who calls this?
// in pre3-28, this seems unreachable (not sure) (bucy 2/02)
void
dm_mech_g1_seek_init(struct dm_disk_if *d) {
double tmpfull, tmpavg, tmptime;
struct dm_mech_g1 *m = (struct dm_mech_g1 *)d->mech;
// XXX get rid of this
FILE *outputfile = stderr;
ddbg_assert2(0, "This is deprecated and/or hasn't been ported.\n");
if ((m->seektype == SEEK_3PT_CURVE) &&
(m->seekavg > m->seekone))
{
fprintf (outputfile, "seekone %" PRIu64 ", seekavg %" PRIu64 ", seekfull %" PRIu64 "\n",
m->seekone, m->seekavg, m->seekfull);
tmpfull = m->seekfull;
tmpavg = m->seekavg;
tmptime = (double) -10.0 * m->seekone;
tmptime += (double) 15.0 * m->seekavg;
tmptime += (double) -5.0 * m->seekfull;
// tmptime = tmptime /
// (3.0 * sqrt((double) (d->dm_cyls)));
m->seekavg *= (double) -15.0;
m->seekavg += (double) 7.0 * m->seekone;
m->seekavg += (double) 8.0 * m->seekfull;
m->seekavg = m->seekavg /
(double) (3 * d->dm_cyls);
m->seekfull = tmptime;
// fprintf (outputfile, "seekone %f, seekavg %f, seekfull %f\n",
// m->seekone, m->seekavg, m->seekfull);
// fprintf (outputfile, "seekone %f, seekavg %f, seekfull %f\n",
// diskseektime(m, 1, 0, 1),
// diskseektime(m, (d->dm_cyls / 3), 0, 1),
// diskseektime(m, (d->dm_cyls - 1), 0, 1));
if ((m->seekavg < 0.0) || (m->seekfull < 0.0)) {
m->seektype = SEEK_3PT_CURVE;
m->seekfull = tmpfull;
m->seekavg = tmpavg;
}
}
}
static void ssd_interrupt_complete (ioreq_event *curr)
{
switch (curr->cause) {
case RECONNECT:
ssd_reconnect_done(curr);
break;
case DISCONNECT:
ssd_disconnect_done(curr);
break;
case COMPLETION:
ssd_completion_done(curr);
break;
default:
ddbg_assert2(0, "bad event type");
}
}
static void simpledisk_interrupt_complete (ioreq_event *curr)
{
// fprintf (outputfile, "Entered simpledisk_interrupt_complete - cause %d\n", curr->cause);
switch (curr->cause) {
case RECONNECT:
simpledisk_reconnect_done(curr);
break;
case DISCONNECT:
simpledisk_disconnect_done(curr);
break;
case COMPLETION:
simpledisk_completion_done(curr);
break;
default:
ddbg_assert2(0, "bad event type");
}
}
int disksim_loadparams(char *inputfile, int synthgen) {
int rv;
int c;
struct lp_tlt **tlts;
int tlts_len;
// register modules with libparam
for(c = 0; c <= DISKSIM_MAX_MODULE; c++) {
lp_register_module(disksim_mods[c]);
}
// diskmodel modules
for(c = 0; c <= DM_MAX_MODULE; c++) {
lp_register_module(dm_mods[c]);
}
// memsmodel modules
for(c = 0; c <= MEMSMODEL_MAX_MODULE; c++) {
lp_register_module(memsmodel_mods[c]);
}
lp_register_topoloader(disksim_topoloader);
// lp_init_typetbl();
disksim->parfile = fopen(inputfile,"r");
ddbg_assert2(disksim->parfile != NULL,
("Parameter file \"%s\" cannot be opened for read access\n",
inputfile));
lp_init_typetbl();
rv = lp_loadfile(disksim->parfile,
&tlts,
&tlts_len,
inputfile,
disksim->overrides,
disksim->overrides_len);
lp_unparse_tlts(tlts, tlts_len, outputfile, inputfile);
lp_instantiate("Global", "Global");
lp_instantiate("Stats", "Stats");
// instantiate any logorgs, syncsets we find
for(c = 0; c < lp_typetbl_len; c++) {
if(lp_typetbl[c] != 0 && (lp_typetbl[c]->spec != 0)) {
if(!strcmp(lp_lookup_base_type(lp_typetbl[c]->sub, 0), "disksim_logorg")) {
iodriver_load_logorg(lp_typetbl[c]->spec);
}
else if(!strcmp(lp_lookup_base_type(lp_typetbl[c]->sub, 0), "disksim_syncset")) {
disk_load_syncsets(lp_typetbl[c]->spec);
}
}
}
// do this *after* logorgs get instantiated!
if(synthgen) {
lp_instantiate("Proc", "Proc");
lp_instantiate("Synthio", "Synthio");
}
fclose(disksim->parfile);
return rv;
}
static void disksim_topoloader(struct lp_topospec *ts, int len) {
int rv = load_iodriver_topo(ts, len);
ddbg_assert2(rv != 0, "Topospec load failed!");
}
static int layout_g2_loadmap(struct dm_layout_g2 *l)
{
FILE *fd;
char junk[1024];
char countstr[16];
char *mapfile;
int extentguess;
int extents_ct = 0;
struct dm_pbn pbn;
int64_t lbn;
int c,h,s,count;
int lastc, lasth;
int cyls, heads;
int i, j;
// index [cyl][head], number of extents for that track
int **track_ext_counts;
struct dm_layout_g2_node *curr;
struct dm_layout_g2_node *track_extents;
struct dm_pbn *currdefect;
mapfile = lp_search_path(lp_cwd, l->mapfile);
fd = fopen(mapfile, "r");
ddbg_assert3(fd != 0, ("failed to open layout mappings file %s", l->mapfile));
// ignore first 2 lines
fgets(junk, sizeof(junk), fd);
fgets(junk, sizeof(junk), fd);
if(fscanf(fd, "%d cylinders, %*d rot, %d heads\n", &cyls, &heads) != 2) {
ddbg_assert2(0, "*** error: layout_g2_loadmap: need <cyls> ... <heads>\n");
}
// printf("*** layout_g2: %s %s\n", vendor, model);
// printf("*** layout_g2: %d %d\n", cyls, heads);
extentguess = cyls * heads * 2; // 0t tracks
extentguess += extentguess/4; // if there are a lot of defects
l->ltop_map = calloc(extentguess, sizeof(struct dm_layout_g2_node));
curr = &l->ltop_map[0];
l->ptol_map = calloc(cyls, sizeof(struct dm_layout_g2_cyl));
for(i = 0; i < cyls; i++) {
l->ptol_map[i].surfaces = calloc(heads, sizeof(struct dm_layout_g2_surf));
}
track_ext_counts = calloc(cyls, sizeof(int *));
for(i = 0; i < cyls; i++) {
track_ext_counts[i] = calloc(heads, sizeof(int));
}
curr = &l->ltop_map[0];
// ltop map
while(fscanf(fd, "lbn %d --> cyl %d, head %d, sect %d, %s %d\n",
&curr->lbn,
&curr->loc.cyl,
&curr->loc.head,
&curr->loc.sector,
countstr,
&curr->len) == 6)
{
if(!strcmp(countstr, "seqcnt")) {
curr->len++;
}
track_ext_counts[curr->loc.cyl][curr->loc.head]++;
curr++;
extents_ct++;
l->ltop_map_len++;
}
// copy the ltop map and sort it by track
track_extents = calloc(extents_ct, sizeof(struct dm_layout_g2_node));
memcpy(track_extents, l->ltop_map, extents_ct * sizeof(struct dm_layout_g2_node));
qsort(track_extents, extents_ct, sizeof(struct dm_layout_g2_node),
trackcmp);
// ptol map
curr = &track_extents[0];
for(i = 0; i < cyls; i++) {
for(j = 0; j < heads; j++) {
int k;
int extents_len = track_ext_counts[i][j];
l->ptol_map[i].surfaces[j].extents = calloc(extents_len, sizeof(struct dm_layout_g2_node));
l->ptol_map[i].surfaces[j].extents_len = extents_len;
for(k = 0; k < extents_len; k++) {
l->ptol_map[i].surfaces[j].extents[k] = *curr;
curr++;
}
}
}
// free the extra extent list
free(track_extents);
// ddbg_assert2(extents_ct > (cyls * heads), "EOF on layout mappings file??");
// l->extents_len = extents_ct;
// populate the defect list
defects = calloc(extents_ct >> 3, sizeof(struct dm_pbn));
currdefect = &defects[0];
while(fscanf(fd, "Defect at cyl %d, head %d, sect %d\n",
&currdefect->cyl,
&currdefect->head,
&currdefect->sector) == 3)
{
currdefect++;
defects_len++;
}
fclose(fd);
return 0;
}
struct dm_layout_if *
dm_layout_g1_loadparams(struct lp_block *b, struct dm_disk_if *d)
{
struct dm_layout_g1 *result = malloc(sizeof(*result));
memset(result, 0, sizeof(*result));
//#include "modules/dm_layout_g1_param.c"
lp_loadparams(result, b, &dm_layout_g1_mod);
result->disk = d;
result->disk->layout = (struct dm_layout_if *)result;
/* result->hdr = g1_layout_nosparing; */
/* result->hdr = g1_layout_sectpertrackspare; */
/* result->hdr = g1_layout_sectperzonespare; */
/* result->hdr = g1_layout_sectpercylspare; */
/* result->hdr = g1_layout_sectperrangespare; */
switch(result->mapping) {
case LAYOUT_NORMAL:
case LAYOUT_CYLSWITCHONSURF1:
case LAYOUT_CYLSWITCHONSURF2:
if(result->sparescheme == NO_SPARING) {
result->hdr = g1_layout_nosparing;
} else {
if (result->sparescheme == TRACK_SPARING) {
result->hdr = g1_layout_tracksparing;
}
else if (result->sparescheme == SECTPERTRACK_SPARING) {
result->hdr = g1_layout_sectpertrackspare;
}
else if ((issectpercyl(result)) ||
(result->sparescheme == SECTATEND_SPARING))
{
result->hdr = g1_layout_sectpercylspare;
}
else if ((result->sparescheme == SECTSPERZONE_SPARING) ||
(result->sparescheme == SECTSPERZONE_SPARING_SLIPTOEND))
{
result->hdr = g1_layout_sectperzonespare;
}
else if (result->sparescheme == SECTPERRANGE_SPARING) {
result->hdr = g1_layout_sectperrangespare;
}
else {
ddbg_assert2(0, "Unknown sparing scheme");
}
}
break;
default:
ddbg_assert2(0, "Unknown lbn<->pbn scheme");
}
// careful with the order here...
initialize_bands(result->disk);
dm_layout_g1_initialize(d);
checknumblocks(result);
setup_band_blknos(result);
return (struct dm_layout_if *)result;
}
static void *
cachedev_disk_access_complete (struct cache_if *c,
ioreq_event *curr)
{
struct cache_dev *cache = (struct cache_dev *)c;
struct cache_dev_event *rwdesc = (struct cache_dev_event *)curr->buf;
struct cache_dev_event *tmp = NULL;
#ifdef DEBUG_CACHEDEV
fprintf (outputfile, "*** %f: Entered cachedev::cache_disk_access_complete: cacheDevEventType %d, buf %p, type %d, devno %d, blkno %d, bcount %d, flags 0x%x\n", simtime, rwdesc->type, curr->buf, curr->type, curr->devno, curr->blkno, curr->bcount, curr->flags);
#endif
switch(rwdesc->type) {
case CACHE_EVENT_READ:
/* Consider writing same buffer to cache_devno, in order to populate it.*/
/* Not clear whether it is more appropriate to do it from here or from */
/* "free_block_clean" -- do it here for now to get more overlap. */
if (curr->devno == cache->real_devno) {
ioreq_event *flushreq = ioreq_copy(rwdesc->req);
flushreq->type = IO_ACCESS_ARRIVE;
flushreq->buf = rwdesc;
flushreq->flags = WRITE;
flushreq->devno = cache->cache_devno;
rwdesc->type = CACHE_EVENT_POPULATE_ALSO;
#ifdef DEBUG_CACHEDEV
fprintf (outputfile, "*** %f: Entered cachedev::cache_disk_access_complete - flushing memory cache to disk: type %d, devno %d, blkno %d, bcount %d, flags 0x%x, buf %p\n", simtime, flushreq->type, flushreq->devno, flushreq->blkno, flushreq->bcount, flushreq->flags, flushreq->buf);
#endif
(*cache->issuefunc)(cache->issueparam, flushreq);
cache->stat.popwrites++;
cache->stat.popwriteblocks += rwdesc->req->bcount;
}
/* Ongoing read request can now proceed, so call donefunc from get_block*/
(*rwdesc->donefunc)(rwdesc->doneparam,rwdesc->req);
break;
case CACHE_EVENT_WRITE:
/* finished writing to cache-device */
if (curr->devno == cache->cache_devno) {
cachedev_setbits (cache->validmap, curr);
cachedev_setbits (cache->dirtymap, curr);
if (cache->writescheme == CACHE_WRITE_THRU) {
ioreq_event *flushreq = ioreq_copy(rwdesc->req);
flushreq->type = IO_ACCESS_ARRIVE;
flushreq->buf = rwdesc;
flushreq->flags = WRITE;
flushreq->devno = cache->real_devno;
rwdesc->type = CACHE_EVENT_FLUSH;
(*cache->issuefunc)(cache->issueparam, flushreq);
cache->stat.destagewrites++;
cache->stat.destagewriteblocks += rwdesc->req->bcount;
}
}
(*rwdesc->donefunc)(rwdesc->doneparam,rwdesc->req);
if (rwdesc->type != CACHE_EVENT_FLUSH) {
cachedev_remove_ongoing_request (cache, rwdesc);
addtoextraq ((event *) rwdesc);
cache->bufferspace -= curr->bcount;
}
break;
case CACHE_EVENT_POPULATE_ONLY:
cachedev_setbits (cache->validmap, curr);
cachedev_remove_ongoing_request (cache, rwdesc);
addtoextraq ((event *) rwdesc);
cache->bufferspace -= curr->bcount;
break;
case CACHE_EVENT_POPULATE_ALSO:
cachedev_setbits (cache->validmap, curr);
rwdesc->type = CACHE_EVENT_READ;
break;
case CACHE_EVENT_FLUSH:
cachedev_clearbits (cache->dirtymap, curr);
cachedev_remove_ongoing_request (cache, rwdesc);
addtoextraq ((event *) rwdesc);
cache->bufferspace -= curr->bcount;
break;
case CACHE_EVENT_IDLEFLUSH_READ:
{
ioreq_event *flushreq = ioreq_copy (curr);
flushreq->type = IO_ACCESS_ARRIVE;
flushreq->flags = WRITE;
flushreq->devno = cache->real_devno;
rwdesc->type = CACHE_EVENT_IDLEFLUSH_FLUSH;
(*cache->issuefunc)(cache->issueparam, flushreq);
cache->stat.destagewrites++;
cache->stat.destagewriteblocks += curr->bcount;
} break;
case CACHE_EVENT_IDLEFLUSH_FLUSH:
cachedev_clearbits (cache->dirtymap, curr);
cachedev_remove_ongoing_request (cache, rwdesc);
addtoextraq ((event *) rwdesc);
cachedev_idlework_callback (cache, curr->devno);
cache->bufferspace -= curr->bcount;
break;
default:
ddbg_assert2(0, "Unknown cachedev event type");
break;
}
addtoextraq((event *) curr);
/* returned cacheevent will get forwarded to cachedev_wakeup_continue... */
return(tmp);
}
/* dummy */
void disksim_device_loadparams(void) {
ddbg_assert2(0, "this is a dummy that isn't supposed to be called");
}
int disksim_iomap_loadparams(struct lp_block *b) {
ddbg_assert2(0, "this is a dummy and isn't supposed to be called");
return 0;
}
void
dm_mech_g1_read_extracted_seek_curve (char *filename,
int *cntptr,
int **distsptr,
dm_time_t **timesptr)
{
int rv, mat;
int lineflag = 1;
int count = 0, buflen = 128;
int *dists;
dm_time_t *times;
FILE *seekfile = NULL;
char linebuf[1024];
char *pathname = lp_search_path(lp_cwd, filename);
if(pathname) {
seekfile = fopen(pathname, "r");
}
else {
ddbg_assert2(0, "Seek file not found in path!");
}
ddbg_assert3(seekfile != 0, ("fopen seekfile (%s) failed: %s",
filename,
strerror(errno)));
rv = (fgets(linebuf, sizeof(linebuf), seekfile) != 0);
mat = sscanf(linebuf, "Seek distances measured: %d\n", &count);
if(mat == 1) {
buflen = count;
lineflag = 0;
}
dists = calloc(buflen, sizeof(*dists));
times = calloc(buflen, sizeof(*times));
do {
double time, stdev;
int dist;
if(!lineflag) {
rv = (fgets(linebuf, sizeof(linebuf), seekfile) != 0);
}
else {
lineflag = 0;
}
if(rv) {
mat = sscanf(linebuf, "%d, %lf, %lf\n", &dist, &time, &stdev);
if(mat == 2 || mat == 3) {
if(count >= buflen-1) {
buflen *= 2;
dists = realloc(dists, buflen * sizeof(*dists));
times = realloc(times, buflen * sizeof(*times));
}
dists[count] = dist;
times[count] = dm_time_dtoi(time);
count++;
}
else {
fprintf(stderr, "*** bogus line in seek curve (%s:%d): %s\n",
__FILE__, __LINE__, linebuf);
}
}
} while(rv);
fclose(seekfile);
*cntptr = count;
*distsptr = dists;
*timesptr = times;
}