xref: /kernel/uniproton/src/om/cpup/prt_cpup_thread.c (revision 54568cb3) 
1/*
2 * Copyright (c) 2009-2022 Huawei Technologies Co., Ltd. All rights reserved.
3 *
4 * UniProton is licensed under Mulan PSL v2.
5 * You can use this software according to the terms and conditions of the Mulan PSL v2.
6 * You may obtain a copy of Mulan PSL v2 at:
7 *          http://license.coscl.org.cn/MulanPSL2
8 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
9 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
10 * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
11 * See the Mulan PSL v2 for more details.
12 * Create: 2009-12-22
13 * Description: 线程级CPU占用率模块的C文件
14 */
15#include "prt_cpup_thread_internal.h"
16
17/* 当前cpu占用率统计时间窗起始时间 */
18OS_SEC_BSS U64 g_cpuWinStart;
19/* 在计算线程级CPUP时，创建但已删除任务的CPU时间总大小 */
20OS_SEC_BSS U64 g_cpuTimeDelTask;
21OS_SEC_BSS U16 g_cpupDelTask;
22
23/* 硬中断、Tick钩子是否需要计算CPUP标识 */
24OS_SEC_BSS U32 g_cpupFlag;
25
26OS_SEC_L2_TEXT U32 OsCpupGet(void)
27{
28    return (U32)(CPUP_USE_RATE - g_cpup[TSK_GET_INDEX(IDLE_TASK_ID)].usage);
29}
30
31/*
32 * 描述：有tick模式下的cpu占用率采样，在tick中断中被调用,每个tick调用一次，当到达采样间隔时间时计算cpu
33 *       占用率，本函数放在tick处理函数中被调用
34 */
35OS_SEC_L2_TEXT void OsCpupThreadTickTask(void)
36{
37    /* 采样间隔，单位tick */
38    U32 ticksPerSample = g_ticksPerSample;
39
40    /* 每个tick调用一次，当tick数到达采样间隔时计算cpu占用率，全程关中断 */
41    g_tickCount++;
42
43    if (g_tickCount >= ticksPerSample) {
44        OsCpupTickCal();
45
46#if defined(OS_OPTION_CPUP_WARN)
47        /* cpup告警检测 */
48        if (g_cpupWarnCheck != NULL) {
49            g_cpupWarnCheck();
50        }
51#endif
52
53        g_tickCount -= ticksPerSample;
54
55        OsCpupTimeClear();
56    }
57}
58
59/*
60 * 描述：参数检查接口，返回OS_OK成功，其他为错误码
61 */
62OS_SEC_L2_TEXT U32 OsCpupPreCheck(void)
63{
64    if (!OsCpupInitIsDone()) {
65        return OS_ERRNO_CPUP_NOT_INITED;
66    }
67
68    if ((UNI_FLAG & OS_FLG_BGD_ACTIVE) == 0) {
69        return OS_ERRNO_CPUP_OS_NOT_STARTED;
70    }
71
72    return OS_OK;
73}
74