更新日期: 2022/06/01 来源: https://gitee.com/weharmony/kernel_liteos_a_note
uptime_proc.c 文件参考

浏览源代码.

函数

static int UptimeProcFill (struct SeqBuf *seqBuf, void *v)
 
void ProcUptimeInit (void)
 

变量

static const struct ProcFileOperations UPTIME_PROC_FOPS
 替换了 read 接口的实现 更多...
 

函数说明

◆ ProcUptimeInit()

void ProcUptimeInit ( void  )

在文件 uptime_proc.c77 行定义.

78{
79 struct ProcDirEntry *pde = CreateProcEntry("uptime", 0, NULL);
80 if (pde == NULL) {
81 PRINT_ERR("creat /proc/uptime error!\n");
82 return;
83 }
84
86}
struct ProcDirEntry * CreateProcEntry(const char *name, mode_t mode, struct ProcDirEntry *parent)
create a proc node
Definition: proc_file.c:364
proc 目录/文件项, @notethinking 直接叫 ProcEntry不香吗 ? 操作 /proc的 真正结构体
Definition: proc_fs.h:101
const struct ProcFileOperations * procFileOps
驱动程序,每个 /proc 下目录的驱动程序都不一样
Definition: proc_fs.h:106
static const struct ProcFileOperations UPTIME_PROC_FOPS
替换了 read 接口的实现
Definition: uptime_proc.c:73
函数调用图:
这是这个函数的调用关系图:

◆ UptimeProcFill()

static int UptimeProcFill ( struct SeqBuf seqBuf,
void v 
)
static

在文件 uptime_proc.c41 行定义.

42{
43 struct timespec curtime = {0, 0};
44 int ret;
45#ifdef LOSCFG_KERNEL_CPUP
46 float idleRate;
47 float idleMSec;
48 float usage;
49#endif
50 ret = clock_gettime(CLOCK_MONOTONIC, &curtime);
51 if (ret < 0) {
52 PRINT_ERR("clock_gettime error!\n");
53 return -get_errno();
54 }
55
56#ifdef LOSCFG_KERNEL_CPUP
58 idleRate = LOSCFG_KERNEL_CORE_NUM - usage / LOS_CPUP_PRECISION_MULT / DECIMAL_TO_PERCENT;
59 idleMSec = ((float)curtime.tv_sec * SEC_TO_MSEC + curtime.tv_nsec / MSEC_TO_NSEC) * idleRate;
60
61 (void)LosBufPrintf(seqBuf, "%llu.%03llu %llu.%03llu\n", (unsigned long long)curtime.tv_sec,
62 (unsigned long long)(curtime.tv_nsec / MSEC_TO_NSEC),
63 (unsigned long long)(idleMSec / SEC_TO_MSEC),
64 (unsigned long long)((unsigned long long)idleMSec % SEC_TO_MSEC));
65#else
66 (void)LosBufPrintf(seqBuf, "%llu.%03llu\n", (unsigned long long)curtime.tv_sec,
67 (unsigned long long)(curtime.tv_nsec / MSEC_TO_NSEC));
68
69#endif
70 return 0;
71}
LITE_OS_SEC_TEXT_MINOR UINT32 LOS_HistorySysCpuUsage(UINT16 mode)
获取系统历史CPU占用率 指周期时间内系统的CPU占用率,用于表示系统一段时间内的闲忙程度,也表示CPU的负载情况。系统CPU 占用率的有效表示范围为0~100,其精度(可通过配置调整)为百分比。100...
Definition: los_cpup.c:435
@ CPUP_ALL_TIME
Definition: los_cpup.h:134
int LosBufPrintf(struct SeqBuf *seqBuf, const char *fmt,...)
支持可变参数 写 buf
Definition: los_seq_buf.c:133
ARG_NUM_3 ARG_NUM_1 ARG_NUM_2 ARG_NUM_2 ARG_NUM_3 ARG_NUM_1 ARG_NUM_4 ARG_NUM_2 ARG_NUM_2 ARG_NUM_5 ARG_NUM_2 ARG_NUM_0 ARG_NUM_2 ARG_NUM_1 ARG_NUM_2 ARG_NUM_3 ARG_NUM_7 ARG_NUM_2 ARG_NUM_3 ARG_NUM_2 ARG_NUM_4 ARG_NUM_5 ARG_NUM_6 ARG_NUM_3 ARG_NUM_5 ARG_NUM_7 ARG_NUM_1 ARG_NUM_4 ARG_NUM_5 ARG_NUM_4 ARG_NUM_7 ARG_NUM_2 ARG_NUM_3 ARG_NUM_7 ARG_NUM_7 ARG_NUM_3 ARG_NUM_3 ARG_NUM_3 ARG_NUM_7 ARG_NUM_3 ARG_NUM_2 char ARG_NUM_2 ARG_NUM_1 ARG_NUM_0 ARG_NUM_0 ARG_NUM_3 void ARG_NUM_1 ARG_NUM_0 unsigned ARG_NUM_0 ARG_NUM_2 ARG_NUM_3 ARG_NUM_2 ARG_NUM_5 ARG_NUM_3 ARG_NUM_3 ARG_NUM_4 ARG_NUM_1 ARG_NUM_1 ARG_NUM_3 ARG_NUM_2 ARG_NUM_1 ARG_NUM_4 ARG_NUM_4 ARG_NUM_5 ARG_NUM_3 ARG_NUM_2 void ARG_NUM_6 unsigned ARG_NUM_0 unsigned ARG_NUM_0 ARG_NUM_3 ARG_NUM_3 ARG_NUM_2 ARG_NUM_2 ARG_NUM_1 ARG_NUM_2 ARG_NUM_1 char ARG_NUM_0 ARG_NUM_4 ARG_NUM_1 ARG_NUM_2 ARG_NUM_2 ARG_NUM_4 ARG_NUM_5 ARG_NUM_2 ARG_NUM_3 ARG_NUM_3 ARG_NUM_3 ARG_NUM_3 ARG_NUM_6 ARG_NUM_6 ARG_NUM_5 ARG_NUM_3 void ARG_NUM_3 ARG_NUM_3 ARG_NUM_5 ARG_NUM_1 unsigned ARG_NUM_3 long
ARG_NUM_3 ARG_NUM_1 ARG_NUM_2 ARG_NUM_2 ARG_NUM_3 ARG_NUM_1 ARG_NUM_4 ARG_NUM_2 ARG_NUM_2 ARG_NUM_5 ARG_NUM_2 void
int clock_gettime(clockid_t clockID, struct timespec *tp)
当用户程序进行特定系统调用时(例如clock_gettime(CLOCK_REALTIME_COARSE, &ts)),VDSO代码页会将其拦截;
Definition: time.c:614
函数调用图:

变量说明

◆ UPTIME_PROC_FOPS

const struct ProcFileOperations UPTIME_PROC_FOPS
static
初始值:
= {
.read = UptimeProcFill,
}
static int UptimeProcFill(struct SeqBuf *seqBuf, void *v)
Definition: uptime_proc.c:41

替换了 read 接口的实现

在文件 uptime_proc.c73 行定义.