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test.c
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test.c
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#include <stdlib.h>
#include <stdio.h>
#include "test.h"
int main(int argc, char *argv[])
{
unsigned int i, j, k;
struct request *requests, *req_head, *current_req;
struct ssd_info *ssd;
u_int64_t latency;
display_title();
ssd=(struct ssd_info*)malloc(sizeof(struct ssd_info));
alloc_assert(ssd,"ssd");
memset(ssd,0, sizeof(struct ssd_info));
ssd=parse_args(ssd, argc, argv);
ssd=initiation(ssd);
ssd=make_aged(ssd);
ssd=pre_process_page(ssd);
display_freepage(ssd);
current_req=req_head=read_request(ssd, requests);
display_simulation_intro(ssd);
while (current_req != NULL) {
latency=process_io(ssd, &req_head, current_req);
printf("Latency for %lld is %lld\n", current_req->time, latency);
current_req = current_req->next_node;
}
statistic_output(ssd);
close_file(ssd);
printf("\nThe simulation is completed! \n");
return 0;
}
/***********************************************************************
* Read trace file, output file, and statistics file from args.
* Assign that file to ssd_info global struct.
***********************************************************************/
struct ssd_info *parse_args(struct ssd_info *ssd, int argc, char *argv[])
{
int i;
char *opt;
if (argc < 2) {
display_help();
printf ("\033[31m ERROR\033[0m: require trace file to start simulation\n");
exit(1);
}
// Assign default value
strncpy(ssd->parameterfilename,"page.parameters",16);
strncpy(ssd->outputfilename,"raw/ex.out",11);
strncpy(ssd->statisticfilename,"raw/statistic10.dat",20);
strncpy(ssd->statisticfilename2,"raw/statistic2.dat",19);
// Read filename from program option parameter
for(i = 1; i < argc; i++) {
if (i == 1) {
strcpy(ssd->tracefilename, argv[i]);
continue;
}
strncpy(opt, argv[i], 3);
if (strcmp(opt, "-p=") == 0) {
strcpy(ssd->parameterfilename, argv[i]+3);
printf("ssd->parameterfilename %s \n", ssd->parameterfilename);
} else if (strcmp(opt, "-o=") == 0) {
strcpy(ssd->outputfilename, argv[i]+3);
} else if (strcmp(opt, "-s=") == 0) {
strcpy(ssd->statisticfilename, argv[i]+3);
}
}
return ssd;
}
/***************************************************************
* Read all request from trace file and insert it to our
* requests queue. We can assume our request queue as another
* "trace file"
**************************************************************/
struct request *read_request(struct ssd_info *ssd, struct request* requests)
{
char buffer[200];
int r_device, r_size;
unsigned int r_lsn = 0, r_operation;
int64_t r_time = 0;
struct request *req, *requests_tail;
requests = NULL;
requests_tail = NULL;
ssd->tracefile=fopen(ssd->tracefilename,"r");
if(ssd->tracefile == NULL ) {
printf("the trace file can't open\n");
exit(1);
}
while(fgets(buffer,200,ssd->tracefile)) {
sscanf(buffer, "%lld %d %d %d %d", &r_time, &r_device, &r_lsn, &r_size, &r_operation);
trace_assert(r_time, r_device, r_lsn, r_size, r_operation);
req = (struct request*)malloc(sizeof(struct request));
alloc_assert(req, "request");
memset(req, 0, sizeof(struct request));
req->time = r_time;
req->lsn = r_lsn;
req->size = r_size;
req->operation = r_operation;
req->begin_time = r_time;
req->response_time = 0;
req->energy_consumption = 0;
req->next_node = NULL;
req->distri_flag = 0;
req->subs = NULL;
req->need_distr_flag = NULL;
req->complete_lsn_count=0;
req->next_node = NULL;
if (requests == NULL) {
requests = req;
requests_tail = req;
} else {
requests_tail->next_node = req;
requests_tail = req;
};
}
return requests;
}
/****************************************************************************************************
* Assumption: all the request in the simulation will finish in fifo order
* process_io() is the main simulation function
* request_head is the current pointer in "trace file", instead of using file, we use queue
* current_req is the request which the latency is returned from this function
****************************************************************************************************/
int64_t process_io(struct ssd_info *ssd, struct request **requests_head, struct request *current_req)
{
unsigned int flag = 0;
struct request *req;
int64_t latency = -1;
// Run simulation until first request (current_request) is done,
// indicated with latency >= 0
while (latency < 0) {
req = *requests_head;
flag = try_insert_request(ssd, req);
if (flag == FLAG_NEW_REQUEST_ADDED) {
*requests_head = (*requests_head)->next_node;
if (ssd->parameter->dram_capacity != 0) {
buffer_management(ssd);
distribute(ssd);
} else {
no_buffer_distribute(ssd);
}
}
process(ssd);
latency=trace_output(ssd);
}
return latency;
}
/***************************************************************
* This function will try to insert new request from
* our request queue (our "trace file") into ssd request queue.
* Return value:
* FLAG_NO_REQUEST_ADDED : our new request can not be inserted
* to ssd queue because of some reasons
* FLAG_NEW_REQUEST_ADDED : our new request is successfully
* added to ssd request queue
***************************************************************/
int try_insert_request(struct ssd_info *ssd, struct request *req)
{
int large_lsn;
int64_t nearest_event_time;
struct request *new_req;
if(req == NULL) {
nearest_event_time=find_nearest_event(ssd);
ssd->current_time=nearest_event_time;
return FLAG_NO_REQUEST_ADDED;
}
if(req->lsn < 0 && req->size < 0 && req->operation < 0) {
printf("Error! wrong io request from trace file\n");
exit(1);
}
if(req->lsn < ssd->min_lsn) ssd->min_lsn = req->lsn;
if(req->lsn > ssd->max_lsn) ssd->max_lsn = req->lsn;
large_lsn = (int)((ssd->parameter->subpage_page*ssd->parameter->page_block*ssd->parameter->block_plane*ssd->parameter->plane_die*ssd->parameter->die_chip*ssd->parameter->chip_num)*(1-ssd->parameter->overprovide));
req->lsn = req->lsn % large_lsn;
nearest_event_time = find_nearest_event(ssd);
if (nearest_event_time == MAX_INT64) {
ssd->current_time = req->time;
} else {
if (nearest_event_time < req->time) {
if (ssd->current_time <= nearest_event_time) ssd->current_time = nearest_event_time;
return FLAG_NO_REQUEST_ADDED;
} else {
if (ssd->request_queue_length >= ssd->parameter->queue_length) {
ssd->current_time = nearest_event_time;
return FLAG_NO_REQUEST_ADDED;
} else {
ssd->current_time = req->time;
}
}
}
if (req->time < 0) {
printf("Error! time is less than 0");
exit(1);
}
// Successfully add new request to ssd request queue, malloc new request object, then insert it to request queue
new_req = (struct request*)malloc(sizeof(struct request));
alloc_assert(new_req,"request");
memset(new_req,0, sizeof(struct request));
new_req->time = req->time;
new_req->lsn = req->lsn;
new_req->size = req->size;
new_req->operation = req->operation;
new_req->begin_time = req->time;
new_req->response_time = 0;
new_req->energy_consumption = 0;
new_req->next_node = NULL;
new_req->distri_flag = 0; // indicate whether this request has been distributed already
new_req->subs = NULL;
new_req->need_distr_flag = NULL;
new_req->complete_lsn_count=0; //record the count of lsn served by buffer
if(ssd->request_queue == NULL) {
ssd->request_queue = new_req;
ssd->request_tail = new_req;
ssd->request_queue_length++;
} else {
(ssd->request_tail)->next_node = new_req;
ssd->request_tail = new_req;
ssd->request_queue_length++;
}
// Calculate average read and write request size
if (req->operation == READ)
ssd->ave_read_size=(ssd->ave_read_size*ssd->read_request_count+req->size)/(ssd->read_request_count+1);
else
ssd->ave_write_size=(ssd->ave_write_size*ssd->write_request_count+req->size)/(ssd->write_request_count+1);
if (req->next_node != NULL)
ssd->next_request_time = req->next_node->time;
else
ssd->next_request_time = req->time;
return FLAG_NEW_REQUEST_ADDED;
}
/******************simulate() *********************************************************************
*simulate()是核心处理函数，主要实现的功能包括
*1,从trace文件中获取一条请求，挂到ssd->request
*2，根据ssd是否有dram分别处理读出来的请求，把这些请求处理成为读写子请求，挂到ssd->channel或者ssd上
*3，按照事件的先后来处理这些读写子请求。
*4，输出每条请求的子请求都处理完后的相关信息到outputfile文件中
**************************************************************************************************/
struct ssd_info *simulate(struct ssd_info *ssd)
{
int flag=1,flag1=0;
double output_step=0;
unsigned int a=0,b=0;
//errno_t err;
printf("\n");
printf("begin simulating.......................\n");
printf("\n");
printf("\n");
printf(" ^o^ OK, please wait a moment, and enjoy music and coffee ^o^ \n");
ssd->tracefile = fopen(ssd->tracefilename,"r");
if(ssd->tracefile == NULL)
{
printf("the trace file can't open\n");
return NULL;
}
fprintf(ssd->outputfile," arrive lsn size ope begin time response time process time\n");
fflush(ssd->outputfile);
while(flag!=100)
{
// Interface layer
flag=get_requests(ssd);
// Buffer layer
if(flag == 1)
{
//printf("once\n");
if (ssd->parameter->dram_capacity!=0)
{
buffer_management(ssd);
distribute(ssd);
}
else
{
no_buffer_distribute(ssd);
}
}
// FTL+FCL+Flash layer
process(ssd);
trace_output(ssd);
if(flag == 0 && ssd->request_queue == NULL)
flag = 100;
}
fclose(ssd->tracefile);
return ssd;
}
/******** get_request ******************************************************
* 1.get requests that arrived already
* 2.add those request node to ssd->reuqest_queue
* return 0: reach the end of the trace
* -1: no request has been added
* 1: add one request to list
*SSD模拟器有三种驱动方式:时钟驱动(精确，太慢) 事件驱动(本程序采用) trace驱动()，
*两种方式推进事件：channel/chip状态改变、trace文件请求达到。
*channel/chip状态改变和trace文件请求到达是散布在时间轴上的点，每次从当前状态到达
*下一个状态都要到达最近的一个状态，每到达一个点执行一次process
********************************************************************************/
int get_requests(struct ssd_info *ssd)
{
char buffer[200];
unsigned int lsn=0;
int device, size, ope,large_lsn, i = 0,j=0;
struct request *request1;
int flag = 1;
long filepoint;
int64_t time_t = 0;
int64_t nearest_event_time;
#ifdef DEBUG
printf("enter get_requests, current time:%lld\n",ssd->current_time);
#endif
// If not EOF, try to add new request
if(!feof(ssd->tracefile)) {
filepoint = ftell(ssd->tracefile);
fgets(buffer, 200, ssd->tracefile);
sscanf(buffer,"%lld %d %d %d %d",&time_t,&device,&lsn,&size,&ope);
// Else continue to process queue until empty
} else {
nearest_event_time=find_nearest_event(ssd);
ssd->current_time=nearest_event_time;
return 0;
}
if ((device<0)&&(lsn<0)&&(size<0)&&(ope<0)) {
printf("Error! wrong io request from trace file\n");
return 100;
}
if (lsn<ssd->min_lsn)
ssd->min_lsn=lsn;
if (lsn>ssd->max_lsn)
ssd->max_lsn=lsn;
/******************************************************************************************************
*上层文件系统发送给SSD的任何读写命令包括两个部分（LSN，size） LSN是逻辑扇区号，对于文件系统而言，它所看到的存
*储空间是一个线性的连续空间。例如，读请求（260，6）表示的是需要读取从扇区号为260的逻辑扇区开始，总共6个扇区。
*large_lsn: channel下面有多少个subpage，即多少个sector。overprovide系数：SSD中并不是所有的空间都可以给用户使用，
*比如32G的SSD可能有10%的空间保留下来留作他用，所以乘以1-provide
***********************************************************************************************************/
large_lsn=(int)((ssd->parameter->subpage_page*ssd->parameter->page_block*ssd->parameter->block_plane*ssd->parameter->plane_die*ssd->parameter->die_chip*ssd->parameter->chip_num)*(1-ssd->parameter->overprovide));
lsn = lsn%large_lsn;
nearest_event_time=find_nearest_event(ssd);
printf("%ld: nearest event time is %ld\n", ssd->current_time, nearest_event_time);
if (nearest_event_time==MAX_INT64)
{
ssd->current_time=time_t;
}
else
{
if(nearest_event_time<time_t)
{
/*******************************************************************************
*回滚，即如果没有把time_t赋给ssd->current_time，则trace文件已读的一条记录回滚
*filepoint记录了执行fgets之前的文件指针位置，回滚到文件头+filepoint处
*int fseek(FILE *stream, long offset, int fromwhere);函数设置文件指针stream的位置。
*如果执行成功，stream将指向以fromwhere（偏移起始位置：文件头0，当前位置1，文件尾2）为基准，
*偏移offset（指针偏移量）个字节的位置。如果执行失败(比如offset超过文件自身大小)，则不改变stream指向的位置。
*文本文件只能采用文件头0的定位方式，本程序中打开文件方式是"r":以只读方式打开文本文件
**********************************************************************************/
fseek(ssd->tracefile,filepoint,0);
if(ssd->current_time<=nearest_event_time)
ssd->current_time=nearest_event_time;
return -1;
}
else
{
if (ssd->request_queue_length>=ssd->parameter->queue_length)
{
fseek(ssd->tracefile,filepoint,0);
ssd->current_time=nearest_event_time;
return -1;
}
else
{
ssd->current_time=time_t;
}
}
}
if(time_t < 0)
{
printf("error!\n");
while(1){}
}
if(feof(ssd->tracefile))
{
request1=NULL;
return 0;
}
request1 = (struct request*)malloc(sizeof(struct request));
alloc_assert(request1,"request");
memset(request1,0, sizeof(struct request));
request1->time = time_t;
request1->lsn = lsn;
request1->size = size;
request1->operation = ope;
request1->begin_time = time_t;
request1->response_time = 0;
request1->energy_consumption = 0;
request1->next_node = NULL;
request1->distri_flag = 0; // indicate whether this request has been distributed already
request1->subs = NULL;
request1->need_distr_flag = NULL;
request1->complete_lsn_count=0; //record the count of lsn served by buffer
filepoint = ftell(ssd->tracefile); // set the file point
if(ssd->request_queue == NULL) //The queue is empty
{
ssd->request_queue = request1;
ssd->request_tail = request1;
ssd->request_queue_length++;
}
else
{
(ssd->request_tail)->next_node = request1;
ssd->request_tail = request1;
ssd->request_queue_length++;
}
if (request1->operation==1) //计算平均请求大小 1为读 0为写
{
ssd->ave_read_size=(ssd->ave_read_size*ssd->read_request_count+request1->size)/(ssd->read_request_count+1);
}
else
{
ssd->ave_write_size=(ssd->ave_write_size*ssd->write_request_count+request1->size)/(ssd->write_request_count+1);
}
filepoint = ftell(ssd->tracefile);
fgets(buffer, 200, ssd->tracefile); //寻找下一条请求的到达时间
sscanf(buffer,"%lld %d %d %d %d",&time_t,&device,&lsn,&size,&ope);
ssd->next_request_time=time_t;
fseek(ssd->tracefile,filepoint,0);
return 1;
}
/**********************************************************************************************************************************************
*首先buffer是个写buffer，就是为写请求服务的，因为读flash的时间tR为20us，写flash的时间tprog为200us，所以为写服务更能节省时间
* 读操作：如果命中了buffer，从buffer读，不占用channel的I/O总线，没有命中buffer，从flash读，占用channel的I/O总线，但是不进buffer了
* 写操作：首先request分成sub_request子请求，如果是动态分配，sub_request挂到ssd->sub_request上，因为不知道要先挂到哪个channel的sub_request上
* 如果是静态分配则sub_request挂到channel的sub_request链上,同时不管动态分配还是静态分配sub_request都要挂到request的sub_request链上
* 因为每处理完一个request，都要在traceoutput文件中输出关于这个request的信息。处理完一个sub_request,就将其从channel的sub_request链
* 或ssd的sub_request链上摘除，但是在traceoutput文件输出一条后再清空request的sub_request链。
* sub_request命中buffer则在buffer里面写就行了，并且将该sub_page提到buffer链头(LRU)，若没有命中且buffer满，则先将buffer链尾的sub_request
* 写入flash(这会产生一个sub_request写请求，挂到这个请求request的sub_request链上，同时视动态分配还是静态分配挂到channel或ssd的
* sub_request链上),在将要写的sub_page写入buffer链头
* Read operation: If you hit the buffer, read from the buffer, do not occupy the channel I / O bus, do not hit the buffer, read from the flash, occupy the channel I / O bus, but do not enter the buffer
***********************************************************************************************************************************************/
struct ssd_info *buffer_management(struct ssd_info *ssd)
{
unsigned int j,lsn,lpn,last_lpn,first_lpn,index,complete_flag=0, state,full_page;
unsigned int flag=0,need_distb_flag,lsn_flag,flag1=1,active_region_flag=0;
struct request *new_request;
struct buffer_group *buffer_node,key;
unsigned int mask=0,offset1=0,offset2=0;
#ifdef DEBUG
printf("enter buffer_management, current time:%lld\n",ssd->current_time);
#endif
ssd->dram->current_time=ssd->current_time;
full_page=~(0xffffffff<<ssd->parameter->subpage_page);
new_request=ssd->request_tail;
lsn=new_request->lsn;
lpn=new_request->lsn/ssd->parameter->subpage_page;
last_lpn=(new_request->lsn+new_request->size-1)/ssd->parameter->subpage_page;
first_lpn=new_request->lsn/ssd->parameter->subpage_page;
new_request->need_distr_flag=(unsigned int*)malloc(sizeof(unsigned int)*((last_lpn-first_lpn+1)*ssd->parameter->subpage_page/32+1));
alloc_assert(new_request->need_distr_flag,"new_request->need_distr_flag");
memset(new_request->need_distr_flag, 0, sizeof(unsigned int)*((last_lpn-first_lpn+1)*ssd->parameter->subpage_page/32+1));
if(new_request->operation==READ)
{
while(lpn<=last_lpn)
{
/************************************************************************************************
*need_distb_flag表示是否需要执行distribution函数，1表示需要执行，buffer中没有，0表示不需要执行
*即1表示需要分发，0表示不需要分发，对应点初始全部赋为1
*************************************************************************************************/
need_distb_flag=full_page;
key.group=lpn;
buffer_node= (struct buffer_group*)avlTreeFind(ssd->dram->buffer, (TREE_NODE *)&key); // buffer node
while((buffer_node!=NULL)&&(lsn<(lpn+1)*ssd->parameter->subpage_page)&&(lsn<=(new_request->lsn+new_request->size-1)))
{
lsn_flag=full_page;
mask=1 << (lsn%ssd->parameter->subpage_page);
if(mask>255) // 4KB page
{
printf("the subpage number is larger than 8!add some cases");
getchar();
}
else if((buffer_node->stored & mask)==mask)
{
flag=1;
lsn_flag=lsn_flag&(~mask);
}
if(flag==1)
{ //如果该buffer节点不在buffer的队首，需要将这个节点提到队首，实现了LRU算法，这个是一个双向队列。
if(ssd->dram->buffer->buffer_head!=buffer_node)
{
if(ssd->dram->buffer->buffer_tail==buffer_node)
{
buffer_node->LRU_link_pre->LRU_link_next=NULL;
ssd->dram->buffer->buffer_tail=buffer_node->LRU_link_pre;
}
else
{
buffer_node->LRU_link_pre->LRU_link_next=buffer_node->LRU_link_next;
buffer_node->LRU_link_next->LRU_link_pre=buffer_node->LRU_link_pre;
}
buffer_node->LRU_link_next=ssd->dram->buffer->buffer_head;
ssd->dram->buffer->buffer_head->LRU_link_pre=buffer_node;
buffer_node->LRU_link_pre=NULL;
ssd->dram->buffer->buffer_head=buffer_node;
}
ssd->dram->buffer->read_hit++;
new_request->complete_lsn_count++;
}
else if(flag==0)
{
ssd->dram->buffer->read_miss_hit++;
}
need_distb_flag=need_distb_flag&lsn_flag;
flag=0;
lsn++;
}
index=(lpn-first_lpn)/(32/ssd->parameter->subpage_page);
new_request->need_distr_flag[index]=new_request->need_distr_flag[index]|(need_distb_flag<<(((lpn-first_lpn)%(32/ssd->parameter->subpage_page))*ssd->parameter->subpage_page)); lpn++;
}
}
else if(new_request->operation==WRITE)
{
while(lpn<=last_lpn)
{
need_distb_flag=full_page;
mask=~(0xffffffff<<(ssd->parameter->subpage_page));
state=mask;
if(lpn==first_lpn)
{
offset1=ssd->parameter->subpage_page-((lpn+1)*ssd->parameter->subpage_page-new_request->lsn);
state=state&(0xffffffff<<offset1);
}
if(lpn==last_lpn)
{
offset2=ssd->parameter->subpage_page-((lpn+1)*ssd->parameter->subpage_page-(new_request->lsn+new_request->size));
state=state&(~(0xffffffff<<offset2));
}
ssd=insert2buffer(ssd, lpn, state,NULL,new_request);
lpn++;
}
}
complete_flag = 1;
for(j=0;j<=(last_lpn-first_lpn+1)*ssd->parameter->subpage_page/32;j++)
{
if(new_request->need_distr_flag[j] != 0)
{
complete_flag = 0;
}
}
/*************************************************************
*如果请求已经被全部由buffer服务，该请求可以被直接响应，输出结果
*这里假设dram的服务时间为1000ns
*If the request has been served entirely by the buffer, the request can be directly responded to the output.
*This assumes that the service time of the dram is 1000ns.
**************************************************************/
if((complete_flag == 1)&&(new_request->subs==NULL))
{
new_request->begin_time=ssd->current_time;
new_request->response_time=ssd->current_time+1000;
}
return ssd;
}
/*****************************
*lpn向ppn的转换
******************************/
unsigned int lpn2ppn(struct ssd_info *ssd,unsigned int lsn)
{
int lpn, ppn;
struct entry *p_map = ssd->dram->map->map_entry;
#ifdef DEBUG
printf("enter lpn2ppn, current time:%lld\n",ssd->current_time);
#endif
lpn = lsn/ssd->parameter->subpage_page; //lpn
ppn = (p_map[lpn]).pn;
return ppn;
}
/**********************************************************************************
*读请求分配子请求函数，这里只处理读请求，写请求已经在buffer_management()函数中处理了
*根据请求队列和buffer命中的检查，将每个请求分解成子请求，将子请求队列挂在channel上，
*不同的channel有自己的子请求队列
*The read request allocates the sub-request function. Here only the read request is processed. The write request has been processed in the buffer_management() function.
*According to the check of the request queue and the buffer hit, each request is decomposed into sub-requests, and the sub-request queue is hung on the channel.
*Different channels have their own subrequest queues
**********************************************************************************/
struct ssd_info *distribute(struct ssd_info *ssd)
{
unsigned int start, end, first_lsn,last_lsn,lpn,flag=0,flag_attached=0,full_page;
unsigned int j, k, sub_size;
int i=0;
struct request *req;
struct sub_request *sub;
int* complt;
#ifdef DEBUG
printf("enter distribute, current time:%lld\n",ssd->current_time);
#endif
full_page=~(0xffffffff<<ssd->parameter->subpage_page);
req = ssd->request_tail;
if(req->response_time != 0){
return ssd;
}
if (req->operation==WRITE)
{
return ssd;
}
if(req != NULL)
{
if(req->distri_flag == 0)
{
//如果还有一些读请求需要处理 | If there are still some read requests that need to be processed
if(req->complete_lsn_count != ssd->request_tail->size)
{
first_lsn = req->lsn;
last_lsn = first_lsn + req->size;
complt = req->need_distr_flag;
start = first_lsn - first_lsn % ssd->parameter->subpage_page;
end = (last_lsn/ssd->parameter->subpage_page + 1) * ssd->parameter->subpage_page;
i = (end - start)/32;
while(i >= 0)
{
/*************************************************************************************
*一个32位的整型数据的每一位代表一个子页，32/ssd->parameter->subpage_page就表示有多少页，
*这里的每一页的状态都存放在了 req->need_distr_flag中，也就是complt中，通过比较complt的
*每一项与full_page，就可以知道，这一页是否处理完成。如果没处理完成则通过creat_sub_request
函数创建子请求。
*************************************************************************************/
for(j=0; j<32/ssd->parameter->subpage_page; j++)
{
k = (complt[((end-start)/32-i)] >>(ssd->parameter->subpage_page*j)) & full_page;
if (k !=0)
{
lpn = start/ssd->parameter->subpage_page+ ((end-start)/32-i)*32/ssd->parameter->subpage_page + j;
sub_size=transfer_size(ssd,k,lpn,req);
if (sub_size==0)
{
continue;
}
else
{
sub=creat_sub_request(ssd,lpn,sub_size,0,req,req->operation);
}
}
}
i = i-1;
}
}
else
{
req->begin_time=ssd->current_time;
req->response_time=ssd->current_time+1000;
}
}
}
return ssd;
}
/**********************************************************************
*trace_output()函数是在每一条请求的所有子请求经过process()函数处理完后，
*打印输出相关的运行结果到outputfile文件中，这里的结果主要是运行的时间
*====================================================================
*The trace_output() function is executed after all sub-requests of each request have been processed by the process() function.
*Print out the relevant running results to the outputfile, the result here is mainly the running time
**********************************************************************/
int64_t trace_output(struct ssd_info* ssd){
int flag = 1;
int64_t start_time, end_time, latency = -1;
struct request *req, *pre_node;
struct sub_request *sub, *tmp;
#ifdef DEBUG
printf("enter trace_output, current time:%lld\n",ssd->current_time);
#endif
pre_node=NULL;
req = ssd->request_queue;
start_time = 0;
end_time = 0;
if(req == NULL)
return 0;
while(req != NULL)
{
sub = req->subs;
flag = 1;
start_time = 0;
end_time = 0;
if(req->response_time != 0)
{
latency = req->response_time-req->time;
fprintf(ssd->outputfile,"%16lld %10d %6d %2d %16lld %16lld %10lld\n",req->time,req->lsn, req->size, req->operation, req->begin_time, req->response_time, latency);
fflush(ssd->outputfile);
if(req->response_time-req->begin_time==0)
{
printf("the response time is 0?? \n");
getchar();
}
if (req->operation==READ)
{
ssd->read_request_count++;
ssd->read_avg=ssd->read_avg+(req->response_time-req->time);
}
else
{
ssd->write_request_count++;
ssd->write_avg=ssd->write_avg+(req->response_time-req->time);
}
if(pre_node == NULL)
{
if(req->next_node == NULL)
{
free(req->need_distr_flag);
req->need_distr_flag=NULL;
free(req);
req = NULL;
ssd->request_queue = NULL;
ssd->request_tail = NULL;
ssd->request_queue_length--;
}
else
{
ssd->request_queue = req->next_node;
pre_node = req;
req = req->next_node;
free(pre_node->need_distr_flag);
pre_node->need_distr_flag=NULL;
free((void *)pre_node);
pre_node = NULL;
ssd->request_queue_length--;
}
}
else
{
if(req->next_node == NULL)
{
pre_node->next_node = NULL;
free(req->need_distr_flag);
req->need_distr_flag=NULL;
free(req);
req = NULL;
ssd->request_tail = pre_node;
ssd->request_queue_length--;
}
else
{
pre_node->next_node = req->next_node;
free(req->need_distr_flag);
req->need_distr_flag=NULL;
free((void *)req);
req = pre_node->next_node;
ssd->request_queue_length--;
}
}
}
else
{
flag=1;
while(sub != NULL)
{
if(start_time == 0)
start_time = sub->begin_time;
if(start_time > sub->begin_time)
start_time = sub->begin_time;
if(end_time < sub->complete_time)
end_time = sub->complete_time;
if((sub->current_state == SR_COMPLETE)||((sub->next_state==SR_COMPLETE)&&(sub->next_state_predict_time<=ssd->current_time))) // if any sub-request is not completed, the request is not completed
{
sub = sub->next_subs;
}
else
{
flag=0;
break;
}
}
if (flag == 1)
{
latency = end_time-req->time;
fprintf(ssd->outputfile,"%16lld %10d %6d %2d %16lld %16lld %10lld\n",req->time,req->lsn, req->size, req->operation, start_time, end_time, latency);
fflush(ssd->outputfile);
if(end_time-start_time==0)
{
printf("the response time is 0?? \n");
getchar();
}
if (req->operation==READ)
{
ssd->read_request_count++;
ssd->read_avg=ssd->read_avg+(end_time-req->time);
}
else
{
ssd->write_request_count++;
ssd->write_avg=ssd->write_avg+(end_time-req->time);
}
while(req->subs!=NULL)
{
tmp = req->subs;
req->subs = tmp->next_subs;
if (tmp->update!=NULL)
{
free(tmp->update->location);
tmp->update->location=NULL;
free(tmp->update);
tmp->update=NULL;
}
free(tmp->location);
tmp->location=NULL;
free(tmp);
tmp=NULL;
}
if(pre_node == NULL)
{
if(req->next_node == NULL)
{
free(req->need_distr_flag);
req->need_distr_flag=NULL;
free(req);
req = NULL;
ssd->request_queue = NULL;
ssd->request_tail = NULL;
ssd->request_queue_length--;
}
else
{
ssd->request_queue = req->next_node;
pre_node = req;
req = req->next_node;
free(pre_node->need_distr_flag);
pre_node->need_distr_flag=NULL;
free(pre_node);
pre_node = NULL;
ssd->request_queue_length--;
}
}
else
{
if(req->next_node == NULL)
{
pre_node->next_node = NULL;
free(req->need_distr_flag);
req->need_distr_flag=NULL;
free(req);
req = NULL;
ssd->request_tail = pre_node;
ssd->request_queue_length--;
}
else
{
pre_node->next_node = req->next_node;
free(req->need_distr_flag);
req->need_distr_flag=NULL;
free(req);
req = pre_node->next_node;
ssd->request_queue_length--;
}
}
}
else
{
pre_node = req;
req = req->next_node;
}
}
}
return latency;
}
/*******************************************************************************
*statistic_output()函数主要是输出处理完一条请求后的相关处理信息。
*1，计算出每个plane的擦除次数即plane_erase和总的擦除次数即erase
*2，打印min_lsn，max_lsn，read_count，program_count等统计信息到文件outputfile中。
*3，打印相同的信息到文件statisticfile中
*******************************************************************************/
void statistic_output(struct ssd_info *ssd)
{
unsigned int lpn_count=0,i,j,k,m,erase=0,plane_erase=0;
double gc_energy=0.0;
#ifdef DEBUG
printf("enter statistic_output, current time:%lld\n",ssd->current_time);
#endif
for(i=0;i<ssd->parameter->channel_number;i++)
{
for(j=0;j<ssd->parameter->die_chip;j++)
{
for(k=0;k<ssd->parameter->plane_die;k++)
{
plane_erase=0;
for(m=0;m<ssd->parameter->block_plane;m++)
{
if(ssd->channel_head[i].chip_head[0].die_head[j].plane_head[k].blk_head[m].erase_count>0)
{
erase=erase+ssd->channel_head[i].chip_head[0].die_head[j].plane_head[k].blk_head[m].erase_count;
plane_erase+=ssd->channel_head[i].chip_head[0].die_head[j].plane_head[k].blk_head[m].erase_count;
}
}
fprintf(ssd->outputfile,"the %d channel, %d chip, %d die, %d plane has : %13d erase operations\n",i,j,k,m,plane_erase);
fprintf(ssd->statisticfile,"the %d channel, %d chip, %d die, %d plane has : %13d erase operations\n",i,j,k,m,plane_erase);