static void ssd_media_access_request_element (ioreq_event *curr)
{
ssd_t *currdisk = getssd(curr->devno);
int blkno = curr->blkno;
int count = curr->bcount;
/* **** CAREFUL ... HIJACKING tempint2 and tempptr2 fields here **** */
curr->tempint2 = count;
while (count != 0) {
// find the element (package) to direct the request
int elem_num = currdisk->timing_t->choose_element(currdisk->timing_t, blkno);
ssd_element *elem = &currdisk->elements[elem_num];
// create a new sub-request for the element
ioreq_event *tmp = (ioreq_event *)getfromextraq();
tmp->devno = curr->devno;
tmp->busno = curr->busno;
tmp->flags = curr->flags;
tmp->blkno = blkno;
tmp->bcount = ssd_choose_aligned_count(currdisk->params.page_size, blkno, count);
ASSERT(tmp->bcount == currdisk->params.page_size);
tmp->tempptr2 = curr;
blkno += tmp->bcount;
count -= tmp->bcount;
elem->metadata.reqs_waiting ++;
// add the request to the corresponding element's queue
ioqueue_add_new_request(elem->queue, (ioreq_event *)tmp);
ssd_activate_elem(currdisk, elem_num);
}
}
static void ssd_request_arrive (ioreq_event *curr)
{
ssd_t *currdisk;
// fprintf (outputfile, "Entering ssd_request_arrive: %12.6f\n", simtime);
// fprintf (outputfile, "ssd = %d, blkno = %d, bcount = %d, read = %d\n",curr->devno, curr->blkno, curr->bcount, (READ & curr->flags));
currdisk = getssd(curr->devno);
// verify that request is valid.
if ((curr->blkno < 0) || (curr->bcount <= 0) ||
((curr->blkno + curr->bcount) > currdisk->numblocks)) {
fprintf(outputfile3, "Invalid set of blocks requested from ssd - blkno %d, bcount %d, numblocks %d\n", curr->blkno, curr->bcount, currdisk->numblocks);
exit(1);
}
/* create a new request, set it up for initial interrupt */
ioqueue_add_new_request(currdisk->queue, curr);
if (currdisk->channel_activity == NULL) {
curr = ioqueue_get_next_request(currdisk->queue);
currdisk->busowned = ssd_get_busno(curr);
currdisk->channel_activity = curr;
currdisk->reconnect_reason = IO_INTERRUPT_ARRIVE;
if (curr->flags & READ) {
ssd_media_access_request (curr);
ssd_check_channel_activity(currdisk);
} else {
curr->cause = READY_TO_TRANSFER;
curr->type = IO_INTERRUPT_ARRIVE;
ssd_send_event_up_path(curr, currdisk->bus_transaction_latency);
}
}
}
static void ssd_reconnect_done (ioreq_event *curr)
{
ssd_t *currdisk;
// fprintf (outputfile, "Entering ssd_reconnect_done for disk %d: %12.6f\n", curr->devno, simtime);
currdisk = getssd (curr->devno);
ssd_assert_current_activity(currdisk, curr);
if (curr->flags & READ) {
if (currdisk->neverdisconnect) {
/* Just holding on to bus; data transfer will be initiated when */
/* media access is complete. */
addtoextraq((event *) curr);
ssd_check_channel_activity (currdisk);
} else {
/* data transfer: curr->bcount, which is still set to original */
/* requested value, indicates how many blks to transfer. */
curr->type = DEVICE_DATA_TRANSFER_COMPLETE;
ssd_send_event_up_path(curr, (double) 0.0);
}
} else {
if (currdisk->reconnect_reason == DEVICE_ACCESS_COMPLETE) {
ssd_request_complete (curr);
} else {
/* data transfer: curr->bcount, which is still set to original */
/* requested value, indicates how many blks to transfer. */
curr->type = DEVICE_DATA_TRANSFER_COMPLETE;
ssd_send_event_up_path(curr, (double) 0.0);
}
}
}
static void ssd_access_complete_element(ioreq_event *curr)
{
ssd_t *currdisk;
int elem_num;
ssd_element *elem;
ioreq_event *x;
currdisk = getssd (curr->devno);
elem_num = currdisk->timing_t->choose_element(currdisk->timing_t, curr->blkno);
ASSERT(elem_num == curr->ssd_elem_num);
elem = &currdisk->elements[elem_num];
if ((x = ioqueue_physical_access_done(elem->queue,curr)) == NULL) {
fprintf(stderr, "ssd_access_complete: ioreq_event not found by ioqueue_physical_access_done call\n");
exit(1);
}
// all the reqs are over
if (ioqueue_get_reqoutstanding(elem->queue) == 0) {
elem->media_busy = FALSE;
}
ssd_complete_parent(curr, currdisk);
addtoextraq((event *) curr);
ssd_activate_elem(currdisk, elem_num);
}
struct device_header *
getdevbyname(char *name,
int *gdevnum, /* global device number */
int *ldevnum, /* type-specific device number */
int *type) /* device type */
{
int c;
for(c = 0; c < disksim->deviceinfo->devs_len; c++) {
if(!disksim->deviceinfo->devicenames[c]) continue;
if(!strcmp(name, disksim->deviceinfo->devicenames[c])) {
if(gdevnum) *gdevnum = c;
if(ldevnum) *ldevnum = devicenos[c];
if(type) *type = devicetypes[c];
switch(devicetypes[c]) {
case DEVICETYPE_DISK:
return (struct device_header *)getdisk(devicenos[c]);
break;
case DEVICETYPE_SIMPLEDISK:
return (struct device_header *)getsimpledisk(devicenos[c]);
break;
case DEVICETYPE_MEMS:
return (struct device_header *)getmems(devicenos[c]);
break;
case DEVICETYPE_SSD: /* SSD: */
return (struct device_header *)getssd(devicenos[c]);
break;
}
}
}
return 0;
}
void ssd_printsetstats (int *set, int setsize, char *sourcestr)
{
int i;
struct ioq * queueset[MAXDEVICES*SSD_MAX_ELEMENTS];
int queuecnt = 0;
int reqcnt = 0;
char prefix[80];
//using more secure functions
sprintf_s4(prefix, 80, "%sssd ", sourcestr);
for (i=0; i<setsize; i++) {
ssd_t *currdisk = getssd (set[i]);
struct ioq *q = currdisk->queue;
queueset[queuecnt] = q;
queuecnt++;
reqcnt += ioqueue_get_number_of_requests(q);
}
if (reqcnt == 0) {
fprintf (outputfile, "\nNo ssd requests for members of this set\n\n");
return;
}
ioqueue_printstats(queueset, queuecnt, prefix);
ssd_acctime_printstats(set, setsize, prefix);
ssd_other_printstats(set, setsize, prefix);
}
void ssd_event_arrive (ioreq_event *curr)
{
ssd_t *currdisk;
// fprintf (outputfile, "Entered ssd_event_arrive: time %f (simtime %f)\n", curr->time, simtime);
// fprintf (outputfile, " - devno %d, blkno %d, type %d, cause %d, read = %d\n", curr->devno, curr->blkno, curr->type, curr->cause, curr->flags & READ);
currdisk = getssd (curr->devno);
switch (curr->type) {
case IO_ACCESS_ARRIVE:
curr->time = simtime + currdisk->overhead;
curr->type = DEVICE_OVERHEAD_COMPLETE;
addtointq((event *) curr);
break;
case DEVICE_OVERHEAD_COMPLETE:
ssd_request_arrive(curr);
break;
case DEVICE_ACCESS_COMPLETE:
ssd_access_complete (curr);
break;
case DEVICE_DATA_TRANSFER_COMPLETE:
ssd_bustransfer_complete(curr);
break;
case IO_INTERRUPT_COMPLETE:
ssd_interrupt_complete(curr);
break;
case IO_QLEN_MAXCHECK:
/* Used only at initialization time to set up queue stuff */
curr->tempint1 = -1;
curr->tempint2 = ssd_get_maxoutstanding(curr->devno);
curr->bcount = 0;
break;
case SSD_CLEAN_GANG:
ssd_clean_gang_complete(curr);
break;
case SSD_CLEAN_ELEMENT:
ssd_clean_element_complete(curr);
break;
default:
fprintf(stderr, "Unrecognized event type at ssd_event_arrive\n");
exit(1);
}
// fprintf (outputfile, "Exiting ssd_event_arrive\n");
}
int ssd_get_busno (ioreq_event *curr)
{
ssd_t *currdisk;
intchar busno;
int depth;
currdisk = getssd (curr->devno);
busno.value = curr->busno;
depth = currdisk->depth[0];
return(busno.byte[depth]);
}
double ssd_get_blktranstime (ioreq_event *curr)
{
ssd_t *currdisk;
double tmptime;
currdisk = getssd (curr->devno);
tmptime = bus_get_transfer_time(ssd_get_busno(curr), 1, (curr->flags & READ));
if (tmptime < currdisk->blktranstime) {
tmptime = currdisk->blktranstime;
}
return(tmptime);
}
static void ssd_access_complete_element(ioreq_event *curr)
{
ssd_t *currdisk;
int elem_num;
ssd_element *elem;
ioreq_event *x;
int lba;
currdisk = getssd (curr->devno);
elem_num = ssd_choose_element(currdisk->user_params, curr->blkno);
ASSERT(elem_num == curr->ssd_elem_num);
elem = &currdisk->elements[elem_num];
lba = ssd_logical_pageno(curr->blkno, currdisk);
if(curr->flags & READ){
fprintf(outputfile5, "%10.6f %d %d %d\n", simtime, lba, elem_num, curr->blkno);
}
else {
fprintf(outputfile4, "%10.6f %d %d %d\n", simtime, lba, elem_num, curr->blkno);
}
if ((x = ioqueue_physical_access_done(elem->queue,curr)) == NULL) {
fprintf(stderr, "ssd_access_complete: ioreq_event not found by ioqueue_physical_access_done call\n");
exit(1);
}
ssd_dpower(currdisk, 0);
// all the reqs are over
if (ioqueue_get_reqoutstanding(elem->queue) == 0) {
elem->media_busy = FALSE;
}
ssd_complete_parent(curr, currdisk);
addtoextraq((event *) curr);
// added by tiel
// activate request create simtime, type, elem_num
//{
// ioreq_event *temp = (ioreq_event *)getfromextraq();
// temp->type = SSD_ACTIVATE_ELEM;
// temp->time = simtime + (2*currdisk->params.channel_switch_delay);
// //temp->time = simtime;
// temp->ssd_elem_num = elem_num;
// addtointq ((event *)temp);
//}
//printf("time %f \n",simtime);
ssd_activate_elem(currdisk, elem_num);
}
void ssd_activate(ioreq_event *curr)
{
ssd_t *currdisk;
int elem_num;
currdisk = getssd(curr->devno);
elem_num = curr->ssd_elem_num;
// release this event
addtoextraq((event *) curr);
ssd_activate_elem(currdisk, elem_num);
}
void ssd_cleanstats (void)
{
int i, j;
for (i=0; i<MAXDEVICES; i++) {
ssd_t *currdisk = getssd (i);
if (currdisk) {
ioqueue_cleanstats(currdisk->queue);
for (j=0; j<currdisk->params.nelements; j++)
ioqueue_cleanstats(currdisk->elements[j].queue);
}
}
}
static void ssd_acctime_printstats (int *set, int setsize, char *prefix)
{
int i;
statgen * statset[MAXDEVICES];
if (device_printacctimestats) {
for (i=0; i<setsize; i++) {
ssd_t *currdisk = getssd (set[i]);
statset[i] = &currdisk->stat.acctimestats;
}
stat_print_set(statset, setsize, prefix);
}
}
static void ssd_bustransfer_complete (ioreq_event *curr)
{
// fprintf (outputfile, "Entering ssd_bustransfer_complete for disk %d: %12.6f\n", curr->devno, simtime);
if (curr->flags & READ) {
ssd_request_complete (curr);
} else {
ssd_t *currdisk = getssd (curr->devno);
ssd_assert_current_activity(currdisk, curr);
ssd_media_access_request (curr);
ssd_check_channel_activity (currdisk);
}
}
static void ssd_other_printstats (int *set, int setsize, char *prefix)
{
int i;
int numbuswaits = 0;
double waitingforbus = 0.0;
for (i=0; i<setsize; i++) {
ssd_t *currdisk = getssd (set[i]);
numbuswaits += currdisk->stat.numbuswaits;
waitingforbus += currdisk->stat.waitingforbus;
}
fprintf(outputfile, "%sTotal bus wait time: %f\n", prefix, waitingforbus);
fprintf(outputfile, "%sNumber of bus waits: %d\n", prefix, numbuswaits);
}
//extern void intialize_device_physical_parameters();
static void ssd_statinit (int devno, int firsttime)
{
ssd_t *currdisk;
currdisk = getssd (devno);
if (firsttime) {
stat_initialize(statdeffile, statdesc_acctimestats, &currdisk->stat.acctimestats);
} else {
stat_reset(&currdisk->stat.acctimestats);
}
currdisk->stat.requestedbus = 0.0;
currdisk->stat.waitingforbus = 0.0;
currdisk->stat.numbuswaits = 0;
}
void ssd_process_event(ioreq_event *curr)
{
ssd_t *currdisk;
currdisk = getssd (curr->devno);
switch (curr->type) {
// disksim IO event
case DEVICE_OVERHEAD_COMPLETE:
ssd_request_arrive(curr);
break;
case DEVICE_ACCESS_COMPLETE:
ssd_access_complete (curr);
break;
case DEVICE_DATA_TRANSFER_COMPLETE:
ssd_bustransfer_complete(curr);
break;
case IO_INTERRUPT_COMPLETE:
ssd_interrupt_complete(curr);
break;
// SSD IO event
//added by tiel
case SSD_ACTIVATE_ELEM:
ssd_activate(curr);
break;
case SSD_CLEAN_GANG:
ssd_clean_gang_complete(curr);
break;
case SSD_CLEAN_ELEMENT:
ssd_clean_element_complete(curr);
break;
case SSD_CLEAN_LOG:
ssd_clean_logblock_complete(curr);
break;
default:
fprintf(outputfile3, "Unrecognized event type!\n");
exit(1);
}
}
void ssd_resetstats (void)
{
int i;
for (i=0; i<MAXDEVICES; i++) {
ssd_t *currdisk = getssd (i);
if (currdisk) {
int j;
ioqueue_resetstats(currdisk->queue);
for (j=0; j<currdisk->params.nelements; j++) {
ioqueue_resetstats(currdisk->elements[j].queue);
}
ssd_statinit(i, 0);
}
}
}
/*
* cleaning in an element is over.
*/
static void ssd_clean_element_complete(ioreq_event *curr)
{
ssd_t *currdisk;
int elem_num;
currdisk = getssd (curr->devno);
elem_num = curr->ssd_elem_num;
ASSERT(currdisk->elements[elem_num].media_busy == TRUE);
// release this event
addtoextraq((event *) curr);
// activate the gang to serve the next set of requests
currdisk->elements[elem_num].media_busy = 0;
ssd_activate_elem(currdisk, elem_num);
}
/* completion disconnect done */
static void ssd_completion_done (ioreq_event *curr)
{
ssd_t *currdisk = getssd (curr->devno);
ssd_assert_current_activity(currdisk, curr);
// fprintf (outputfile, "Entering ssd_completion for disk %d: %12.6f\n", currdisk->devno, simtime);
addtoextraq((event *) curr);
if (currdisk->busowned != -1) {
bus_ownership_release(currdisk->busowned);
currdisk->busowned = -1;
}
ssd_check_channel_activity (currdisk);
}
/*
* ssd_send_event_up_path()
*
* Acquires the bus (if not already acquired), then uses bus_delay to
* send the event up the path.
*
* If the bus is already owned by this device or can be acquired
* immediately (interleaved bus), the event is sent immediately.
* Otherwise, ssd_bus_ownership_grant will later send the event.
*/
static void ssd_send_event_up_path (ioreq_event *curr, double delay)
{
ssd_t *currdisk;
int busno;
int slotno;
// fprintf (outputfile, "ssd_send_event_up_path - devno %d, type %d, cause %d, blkno %d\n", curr->devno, curr->type, curr->cause, curr->blkno);
currdisk = getssd (curr->devno);
ssd_assert_current_activity(currdisk, curr);
busno = ssd_get_busno(curr);
slotno = currdisk->slotno[0];
/* Put new request at head of buswait queue */
curr->next = currdisk->buswait;
currdisk->buswait = curr;
curr->tempint1 = busno;
curr->time = delay;
if (currdisk->busowned == -1) {
// fprintf (outputfile, "Must get ownership of the bus first\n");
if (curr->next) {
//fprintf(stderr,"Multiple bus requestors detected in ssd_send_event_up_path\n");
/* This should be ok -- counting on the bus module to sequence 'em */
}
if (bus_ownership_get(busno, slotno, curr) == FALSE) {
/* Remember when we started waiting (only place this is written) */
currdisk->stat.requestedbus = simtime;
} else {
currdisk->busowned = busno;
bus_delay(busno, DEVICE, curr->devno, delay, curr); /* Never for SCSI */
}
} else if (currdisk->busowned == busno) {
//fprintf (outputfile, "Already own bus - so send it on up\n");
bus_delay(busno, DEVICE, curr->devno, delay, curr);
} else {
fprintf(stderr, "Wrong bus owned for transfer desired\n");
exit(1);
}
}
int ssd_set_depth (int devno, int inbusno, int depth, int slotno)
{
ssd_t *currdisk;
int cnt;
currdisk = getssd (devno);
assert(currdisk);
cnt = currdisk->numinbuses;
currdisk->numinbuses++;
if ((cnt + 1) > MAXINBUSES) {
fprintf(stderr, "Too many inbuses specified for ssd %d - %d\n", devno, (cnt+1));
exit(1);
}
currdisk->inbuses[cnt] = inbusno;
currdisk->depth[cnt] = depth;
currdisk->slotno[cnt] = slotno;
return(0);
}
void ssd_get_mapping (int maptype, int devno, int blkno, int *cylptr, int *surfaceptr, int *blkptr)
{
ssd_t *currdisk = getssd (devno);
if ((blkno < 0) || (blkno >= currdisk->numblocks)) {
fprintf(stderr, "Invalid blkno at ssd_get_mapping: %d\n", blkno);
exit(1);
}
if (cylptr) {
*cylptr = blkno;
}
if (surfaceptr) {
*surfaceptr = 0;
}
if (blkptr) {
*blkptr = 0;
}
}
/*
* send completion up the line
*/
static void ssd_request_complete(ioreq_event *curr)
{
ssd_t *currdisk;
ioreq_event *x;
// fprintf (outputfile, "Entering ssd_request_complete: %12.6f\n", simtime);
currdisk = getssd (curr->devno);
ssd_assert_current_activity(currdisk, curr);
if ((x = ioqueue_physical_access_done(currdisk->queue,curr)) == NULL) {
fprintf(stderr, "ssd_request_complete: ioreq_event not found by ioqueue_physical_access_done call\n");
exit(1);
}
/* send completion interrupt */
curr->type = IO_INTERRUPT_ARRIVE;
curr->cause = COMPLETION;
ssd_send_event_up_path(curr, currdisk->bus_transaction_latency);
}
void ssd_bus_delay_complete (int devno, ioreq_event *curr, int sentbusno)
{
ssd_t *currdisk;
intchar slotno;
intchar busno;
int depth;
currdisk = getssd (devno);
ssd_assert_current_activity(currdisk, curr);
// fprintf (outputfile, "Entered ssd_bus_delay_complete\n");
// EPW: I think the buswait logic doesn't do anything, is confusing, and risks
// overusing the "next" field, although an item shouldn't currently be a queue.
if (curr == currdisk->buswait) {
currdisk->buswait = curr->next;
} else {
ioreq_event *tmp = currdisk->buswait;
while ((tmp->next != NULL) && (tmp->next != curr)) {
tmp = tmp->next;
}
if (tmp->next != curr) {
// fixed a warning here
//fprintf(stderr, "Bus delay complete for unknown ssd request - devno %d, busno %d\n", devno, busno.value);
fprintf(stderr, "Bus delay complete for unknown ssd request - devno %d, busno %d\n", devno, curr->busno);
exit(1);
}
tmp->next = curr->next;
}
busno.value = curr->busno;
slotno.value = curr->slotno;
depth = currdisk->depth[0];
slotno.byte[depth] = slotno.byte[depth] >> 4;
curr->time = 0.0;
if (depth == 0) {
intr_request ((event *)curr);
} else {
bus_deliver_event(busno.byte[depth], slotno.byte[depth], curr);
}
}
/*
* ssd_bus_ownership_grant
* Calls bus_delay to handle the event that the disk has been granted the bus. I believe
* this is always initiated by a call to ssd_send_even_up_path.
*/
void ssd_bus_ownership_grant (int devno, ioreq_event *curr, int busno, double arbdelay)
{
ssd_t *currdisk;
ioreq_event *tmp;
currdisk = getssd (devno);
ssd_assert_current_activity(currdisk, curr);
tmp = currdisk->buswait;
while ((tmp != NULL) && (tmp != curr)) {
tmp = tmp->next;
}
if (tmp == NULL) {
fprintf(stderr, "Bus ownership granted to unknown ssd request - devno %d, busno %d\n", devno, busno);
exit(1);
}
currdisk->busowned = busno;
currdisk->stat.waitingforbus += arbdelay;
//ASSERT (arbdelay == (simtime - currdisk->stat.requestedbus));
currdisk->stat.numbuswaits++;
bus_delay(busno, DEVICE, devno, tmp->time, tmp);
}
static void ssd_bustransfer_complete (ioreq_event *curr)
{
// fprintf (outputfile, "Entering ssd_bustransfer_complete for disk %d: %12.6f\n", curr->devno, simtime);
if (curr->flags & READ) {
ssd_request_complete (curr);
} else {
ssd_t *currdisk = getssd (curr->devno);
ssd_assert_current_activity(currdisk, curr);
if (currdisk->neverdisconnect == FALSE) {
/* disconnect from bus */
ioreq_event *tmp = ioreq_copy (curr);
tmp->type = IO_INTERRUPT_ARRIVE;
tmp->cause = DISCONNECT;
ssd_send_event_up_path (tmp, currdisk->bus_transaction_latency);
ssd_media_access_request (curr);
} else {
ssd_media_access_request (curr);
ssd_check_channel_activity (currdisk);
}
}
}
static void ssd_access_complete(ioreq_event *curr)
{
ssd_t *currdisk = getssd (curr->devno);;
switch(currdisk->params.alloc_pool_logic) {
case SSD_ALLOC_POOL_PLANE:
case SSD_ALLOC_POOL_CHIP:
ssd_access_complete_element(curr);
break;
case SSD_ALLOC_POOL_GANG:
#if SYNC_GANG
ssd_access_complete_gang_sync(curr);
#else
ssd_access_complete_gang(curr);
#endif
break;
default:
printf("Unknown alloc pool logic %d\n", currdisk->params.alloc_pool_logic);
ASSERT(0);
}
}
static void ssd_access_complete_element(ioreq_event *curr)
{
ssd_t *currdisk;
int elem_num;
ssd_element *elem;
ioreq_event *x;
int lba;
currdisk = getssd (curr->devno);
elem_num = ssd_choose_element(currdisk->user_params, curr->blkno);
ASSERT(elem_num == curr->ssd_elem_num);
elem = &currdisk->elements[elem_num];
lba = ssd_logical_blockno(curr->blkno, currdisk);
if(curr->flags & READ){
fprintf(outputfile5, "%10.6f %d %d %d\n", simtime, lba, elem_num, curr->blkno);
}
else {
fprintf(outputfile4, "%10.6f %d %d %d\n", simtime, lba, elem_num, curr->blkno);
}
if ((x = ioqueue_physical_access_done(elem->queue,curr)) == NULL) {
fprintf(stderr, "ssd_access_complete: ioreq_event not found by ioqueue_physical_access_done call\n");
exit(1);
}
ssd_dpower(currdisk, 0);
// all the reqs are over
if (ioqueue_get_reqoutstanding(elem->queue) == 0) {
elem->media_busy = FALSE;
}
ssd_complete_parent(curr, currdisk);
addtoextraq((event *) curr);
ssd_activate_elem(currdisk, elem_num);
}
void ssd_initialize (void)
{
int i, j;
if (disksim->ssdinfo == NULL) {
ssd_initialize_diskinfo ();
}
initialize_device_physical_parameters(); //Initliaze the physical parameters of the device.
ssd_setcallbacks();
// fprintf(stdout, "MAXDEVICES = %d, numssds %d\n", MAXDEVICES, numssds);
// vp - changing the MAXDEVICES in the below 'for' loop to numssds
for (i=0; i<numssds; i++) {
int exp_size;
ssd_t *currdisk = getssd (i);
if (!currdisk) continue;
ssd_alloc_queues(currdisk); //also allocates the refresh queue
currdisk->params.refresh_interval*=1000; //in ms.
currdisk->next_refresh_time = currdisk->params.refresh_interval;
currdisk->params.refresh_service_time = currdisk->params.block_erase_latency +
( (currdisk->params.page_write_latency +
currdisk->params.page_read_latency) *
currdisk->params.pages_per_block);
if (currdisk->params.checkpoint_time == 0)
currdisk->params.checkpoint_time = 0.5;
currdisk->params.checkpoint_time *= (60* 60 *1000);//hours to milli seconds.
//vp - some verifications:
ssd_verify_parameters(currdisk);
//vp - this was not initialized and caused so many bugs
currdisk->devno = i;
currdisk->numblocks = currdisk->params.nelements *
currdisk->params.blocks_per_element *
currdisk->params.pages_per_block *
currdisk->params.page_size;
currdisk->reconnect_reason = -1;
addlisttoextraq ((event **) &currdisk->buswait);
currdisk->busowned = -1;
currdisk->completion_queue = NULL;
/* hack to init queue structure */
ioqueue_initialize (currdisk->queue, i);
ssd_statinit(i, TRUE);
currdisk->timing_t = ssd_new_timing_t(&currdisk->params);
// initialize the gang
exp_size = ssd_elem_export_size(currdisk);
for (j = 0; j < SSD_NUM_GANG(currdisk); j ++) {
int tot_pages = exp_size * currdisk->params.elements_per_gang;
currdisk->gang_meta[j].busy = 0;
currdisk->gang_meta[j].cleaning = 0;
currdisk->gang_meta[j].reqs_waiting = 0;
currdisk->gang_meta[j].oldest = 0;
currdisk->gang_meta[j].pg2elem = (ssd_elem_number*)malloc(sizeof(ssd_elem_number) * tot_pages);
memset(currdisk->gang_meta[j].pg2elem, 0, sizeof(ssd_elem_number) * tot_pages);
ioqueue_initialize (currdisk->gang_meta[j].queue, i);
}
for (j=0; j<currdisk->params.nelements; j++) {
ssd_element *elem = &currdisk->elements[j];
ioqueue_initialize (elem->queue, i);
/* hack to init queue structure */
elem->media_busy = FALSE;
// vp - pins are also free
elem->pin_busy = FALSE;
// vp - initialize the planes in the element
ssd_plane_init(elem, currdisk, i);
// vp - initialize the ssd element metadata
// FIXME: where to free these data?
if (currdisk->params.write_policy == DISKSIM_SSD_WRITE_POLICY_OSR) {
ssd_element_metadata_init(j, &(elem->metadata), currdisk);
}
//vp - initialize the stat structure
memset(&elem->stat, 0, sizeof(ssd_element_stat));
}
}
fprintf(stderr,"Finished loading state from snapshot\n");
}
