1 /*
2 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
3 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this list of
9 * conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
12 * of conditions and the following disclaimer in the documentation and/or other materials
13 * provided with the distribution.
14 *
15 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
16 * to endorse or promote products derived from this software without specific prior written
17 * permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include "proc_fs.h"
33 #include "time.h"
34 #include "errno.h"
35 #include "los_cpup.h"
36
37 #define MSEC_TO_NSEC 1000000
38 #define SEC_TO_MSEC 1000
39 #define DECIMAL_TO_PERCENT 100
40
UptimeProcFill(struct SeqBuf * seqBuf,void * v)41 static int UptimeProcFill(struct SeqBuf *seqBuf, void *v)
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
57 usage = (float)LOS_HistorySysCpuUsage(CPUP_ALL_TIME);
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 }
72
73 static const struct ProcFileOperations UPTIME_PROC_FOPS = {
74 .read = UptimeProcFill,
75 };
76
ProcUptimeInit(void)77 void ProcUptimeInit(void)
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
85 pde->procFileOps = &UPTIME_PROC_FOPS;
86 }
87
88