diff --git a/yeeshell.c b/yeeshell.c
index 1dda7c0..1e06d86 100644
--- a/yeeshell.c
+++ b/yeeshell.c
@@ -36,7 +36,10 @@ char *history[CMDLINE_HISTORY_MAX_QUANTITY];
 int cmdline_amount = 0;
 
 struct proc *proc = NULL, *prev_proc = NULL;
+int order = ORDER_CPU;
+int blockedverbose = 0;
 int nr_total = 0;
+int slot = 1;
 unsigned int nr_procs, nr_tasks;
 
 int main()
@@ -462,7 +465,7 @@ void parse_dir()
 	DIR *p_dir;
 	struct dirent *p_ent;
 	pid_t pid;
-	char *end;
+	char *end; //end是指向第一个不可转换的字符位置的指针
 
 	if ((p_dir = opendir("/proc")) == NULL)
 	{
@@ -472,12 +475,10 @@ void parse_dir()
 
 	for (p_ent = readdir(p_dir); p_ent != NULL; p_ent = readdir(p_dir))
 	{
-		pid = strtol(p_ent->d_name, &end, 10);
+		pid = strtol(p_ent->d_name, &end, 10); //long strtol(char *str, char **endptr, int base)将串转换为长整数,base是基数，表示要转换的是几进制的数
 
 		if (!end[0] && pid != 0)
-		{
 			parse_file(pid);
-		}
 	}
 
 	closedir(p_dir);
@@ -486,14 +487,15 @@ void parse_dir()
 void parse_file(pid_t pid)
 {
 	char path[PATH_MAX], name[256], type, state;
-	int version, endpt, effuid;
-	unsigned long cycles_hi, cycles_lo;
+	int version, endpt, effuid;			//版本，端点，有效用户ID
+	unsigned long cycles_hi, cycles_lo; //高周期，低周期
 	FILE *fp;
 	struct proc *p;
-	int slot;
+	//int slot; //插槽?
 	int i;
+	//printf("parse_file\n");
 
-	sprintf(path, "%d/psinfo", pid);
+	sprintf(path, "/proc/%d/psinfo", pid);
 
 	if ((fp = fopen(path, "r")) == NULL)
 		return;
@@ -505,7 +507,7 @@ void parse_file(pid_t pid)
 	}
 
 	if (version != PSINFO_VERSION)
-	{
+	{ //0
 		fputs("procfs version mismatch!\n", stderr);
 		exit(1);
 	}
@@ -516,11 +518,12 @@ void parse_file(pid_t pid)
 		return;
 	}
 
-	slot = SLOT_NR(endpt);
+	slot++;
+	//slot = SLOT_NR(endpt);
 
 	if (slot < 0 || slot >= nr_total)
 	{
-		//fprintf(stderr, "top: unreasonable endpoint number %d\n", endpt);
+		fprintf(stderr, "top: unreasonable endpoint number %d\n", endpt);
 		fclose(fp);
 		return;
 	}
@@ -528,18 +531,16 @@ void parse_file(pid_t pid)
 	p = &proc[slot];
 
 	if (type == TYPE_TASK)
-	{
 		p->p_flags |= IS_TASK;
-	}
 	else if (type == TYPE_SYSTEM)
-	{
 		p->p_flags |= IS_SYSTEM;
-	}
 
 	p->p_endpoint = endpt;
 	p->p_pid = pid;
 
-	if (fscanf(fp, " %255s %c %d %d %lu %*u %lu %lu", name, &state, &p->p_blocked, &p->p_priority, &p->p_user_time, &cycles_hi, &cycles_lo) != 7)
+	if (fscanf(fp, " %255s %c %d %d %lu %*u %lu %lu",
+			   name, &state, &p->p_blocked, &p->p_priority,
+			   &p->p_user_time, &cycles_hi, &cycles_lo) != 7)
 	{
 
 		fclose(fp);
@@ -550,16 +551,15 @@ void parse_file(pid_t pid)
 	p->p_name[sizeof(p->p_name) - 1] = 0;
 
 	if (state != STATE_RUN)
-	{
 		p->p_flags |= BLOCKED;
-	}
 	p->p_cpucycles[0] = make64(cycles_lo, cycles_hi);
 	p->p_memory = 0L;
 
 	if (!(p->p_flags & IS_TASK))
 	{
 		int j;
-		if ((j = fscanf(fp, " %lu %*u %*u %*c %*d %*u %u %*u %d %*c %*d %*u", &p->p_memory, &effuid, &p->p_nice)) != 3)
+		if ((j = fscanf(fp, " %lu %*u %*u %*c %*d %*u %u %*u %d %*c %*d %*u",
+						&p->p_memory, &effuid, &p->p_nice)) != 3)
 		{
 
 			fclose(fp);
@@ -569,13 +569,12 @@ void parse_file(pid_t pid)
 		p->p_effuid = effuid;
 	}
 	else
-	{
 		p->p_effuid = 0;
-	}
 
 	for (i = 1; i < CPUTIMENAMES; i++)
 	{
-		if (fscanf(fp, " %lu %lu", &cycles_hi, &cycles_lo) == 2)
+		if (fscanf(fp, " %lu %lu",
+				   &cycles_hi, &cycles_lo) == 2)
 		{
 			p->p_cpucycles[i] = make64(cycles_lo, cycles_hi);
 		}
@@ -622,11 +621,14 @@ void getkinfo()
 void print_procs(struct proc *proc1, struct proc *proc2, int cputimemode)
 {
 	int p, nprocs;
+	//u64_t idleticks = 0;
+	//u64_t kernelticks = 0;
 	u64_t systemticks = 0;
 	u64_t userticks = 0;
 	u64_t total_ticks = 0;
 	int blockedseen = 0;
-	static struct tp *tick_procs = NULL;
+	static struct tp *tick_procs = NULL; //tp结构体的数组tick_procs,对所有的进程和任务(即上面读出来的nr_total)计算ticks
+
 	if (tick_procs == NULL)
 	{
 		tick_procs = malloc(nr_total * sizeof(tick_procs[0]));
@@ -642,58 +644,37 @@ void print_procs(struct proc *proc1, struct proc *proc2, int cputimemode)
 	{
 		u64_t uticks;
 		if (!(proc2[p].p_flags & USED))
-		{
 			continue;
-		}
 		tick_procs[nprocs].p = proc2 + p;
 		tick_procs[nprocs].ticks = cputicks(&proc1[p], &proc2[p], cputimemode);
 		uticks = cputicks(&proc1[p], &proc2[p], 1);
 		total_ticks = total_ticks + uticks;
+		//printf("total_ticks:%llu\n",total_ticks);
+		/*if(p-NR_TASKS == IDLE) {
+			idleticks = uticks;
+			continue;
+		}
+		if(p-NR_TASKS == KERNEL) {
+			kernelticks = uticks;
+		}
+		*/
 		if (!(proc2[p].p_flags & IS_TASK))
 		{
 			if (proc2[p].p_flags & IS_SYSTEM)
-			{
 				systemticks = systemticks + tick_procs[nprocs].ticks;
-			}
 			else
-			{
 				userticks = userticks + tick_procs[nprocs].ticks;
-			}
 		}
+
 		nprocs++;
 	}
 
 	if (total_ticks == 0)
-	{
 		return;
-	}
 
 	printf("CPU states: %6.2f%% user, ", 100.0 * userticks / total_ticks);
 	printf("%6.2f%% system", 100.0 * systemticks / total_ticks);
 	printf("%6.2f%% in total\n", 100.0 * (systemticks + userticks) / total_ticks);
-}
-
-u64_t cputicks(struct proc *p1, struct proc *p2, int timemode)
-{
-	int i;
-	u64_t t = 0;
-	for (i = 0; i < CPUTIMENAMES; i++)
-	{
-		if (!CPUTIME(timemode, i))
-		{
-			continue;
-		}
-		if (p1->p_endpoint == p2->p_endpoint)
-		{
-			{
-				t = t + p2->p_cpucycles[i] - p1->p_cpucycles[i];
-			}
-		}
-		else
-		{
-			t = t + p2->p_cpucycles[i];
-		}
-	}
-
-	return t;
+	//printf("%6.2f%% kernel, ", 100.0 * kernelticks/ total_ticks);
+	//printf("%6.2f%% idle", 100.0 * idleticks / total_ticks);
 }
\ No newline at end of file
diff --git a/yeeshell.h b/yeeshell.h
index 91140d9..ba54bdd 100644
--- a/yeeshell.h
+++ b/yeeshell.h
@@ -15,28 +15,33 @@
 #define REDIRECT_OUT 1 /* redirect output */
 #define REDIRECT_IN 2  /* redirect input */
 
-typedef int endpoint_t;
-typedef uint64_t u64_t;
-typedef long unsigned int vir_bytes;
+#define _PATH_PROC "/proc/"
+#define PSINFO_VERSION 0
+#define TYPE_TASK 'T'
+#define TYPE_SYSTEM 'S'
+#define TYPE_USER 'U'
+#define STATE_RUN 'R'
+#define TIMECYCLEKEY 't'
+#define ORDERKEY 'o'
+
 #define USED 0x1
 #define IS_TASK 0x2
 #define IS_SYSTEM 0x4
 #define BLOCKED 0x8
-#define TYPE_TASK 'T'
-#define TYPE_SYSTEM 'S'
-#define STATE_RUN 'R'
-#define MAX_NR_TASKS 1023
-#define SELF ((endpoint_t)0x8ace)
-#define _MAX_MAGIC_PROC (SELF)
-#define _ENDPOINT_GENERATION_SIZE (MAX_NR_TASKS + _MAX_MAGIC_PROC + 1)
-#define _ENDPOINT_P(e) \
-    ((((e) + MAX_NR_TASKS) % _ENDPOINT_GENERATION_SIZE) - MAX_NR_TASKS)
-#define SLOT_NR(e) (_ENDPOINT_P(e) + 5)
-#define _PATH_PROC "/proc"
-#define CPUTIME(m, i) (m & (1L << (i)))
+
+#define ORDER_CPU 0
+#define ORDER_MEMORY 1
+#define ORDER_HIGHEST ORDER_MEMORY
+
+#define TC_BUFFER 1024 /* Size of termcap(3) buffer    */
+#define TC_STRINGS 200 /* Enough room for cm,cl,so,se  */
+
+/* name of cpu cycle types, in the order they appear in /psinfo. */
 const char *cputimenames[] = {"user", "ipc", "kernelcall"};
 #define CPUTIMENAMES (sizeof(cputimenames) / sizeof(cputimenames[0]))
 
+#define CPUTIME(m, i) (m & (1L << (i)))
+
 struct proc
 {
     int p_flags;
@@ -95,5 +100,4 @@ void get_procs();
 void parse_dir();
 void parse_file(pid_t pid);
 void getkinfo();
-void print_procs(struct proc *proc1, struct proc *proc2, int cputimemode);
-u64_t cputicks(struct proc *p1, struct proc *p2, int timemode);
\ No newline at end of file
+void print_procs(struct proc *proc1, struct proc *proc2, int cputimemode);
\ No newline at end of file