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kernel_liteos_a/kernel/extended/cpup/los_cpup.c

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/*
* Copyright (c) 2013-2019, Huawei Technologies Co., Ltd. All rights reserved.
* Copyright (c) 2020, Huawei Device Co., Ltd. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "los_cpup_pri.h"
#include "los_process_pri.h"
#include "los_base.h"
#include "los_swtmr.h"
#ifdef __cplusplus
#if __cplusplus
extern "C" {
#endif /* __cplusplus */
#endif /* __cplusplus */
#ifdef LOSCFG_KERNEL_CPUP
LITE_OS_SEC_BSS STATIC UINT16 swtmrID;
LITE_OS_SEC_BSS STATIC UINT16 cpupInitFlg = 0;
LITE_OS_SEC_BSS OsCpupCB *g_cpup = NULL;
LITE_OS_SEC_BSS STATIC UINT16 cpupMaxNum;
LITE_OS_SEC_BSS STATIC UINT16 hisPos = 0; /* current Sampling point of historyTime */
LITE_OS_SEC_BSS STATIC UINT64 cpuHistoryTime[OS_CPUP_HISTORY_RECORD_NUM + 1];
LITE_OS_SEC_BSS STATIC UINT64 startCycles = 0;
#ifdef LOSCFG_CPUP_INCLUDE_IRQ
LITE_OS_SEC_BSS STATIC UINT64 timeInIrqPerProcessSwitch[LOSCFG_KERNEL_CORE_NUM];
LITE_OS_SEC_BSS STATIC UINT64 intTimeStart[LOSCFG_KERNEL_CORE_NUM];
#endif
#define OS_CPUP_UNUSED 0x0U
#define OS_CPUP_USED 0x1U
#define HIGH_BITS 32
#define CPUP_PRE_POS(pos) (((pos) == 0) ? (OS_CPUP_HISTORY_RECORD_NUM - 1) : ((pos) - 1))
#define CPUP_POST_POS(pos) (((pos) == (OS_CPUP_HISTORY_RECORD_NUM - 1)) ? 0 : ((pos) + 1))
LITE_OS_SEC_TEXT_INIT VOID OsCpupGuard(VOID)
{
UINT16 prevPos;
UINT16 loop;
UINT32 pid;
UINT32 intSave;
UINT64 curCycle;
SCHEDULER_LOCK(intSave);
curCycle = OsGetCpuCycle();
prevPos = hisPos;
hisPos = CPUP_POST_POS(hisPos);
cpuHistoryTime[prevPos] = curCycle;
for (loop = 0; loop < cpupMaxNum; loop++) {
g_cpup[loop].historyTime[prevPos] = g_cpup[loop].allTime;
}
for (loop = 0; loop < LOSCFG_KERNEL_CORE_NUM; loop++) {
pid = OsCpuProcessIDGetUnsafe(loop);
/* reacquire the cycle to prevent flip */
curCycle = OsGetCpuCycle();
g_cpup[pid].historyTime[prevPos] += curCycle - g_cpup[pid].startTime;
#ifdef LOSCFG_CPUP_INCLUDE_IRQ
g_cpup[pid].historyTime[prevPos] -= timeInIrqPerProcessSwitch[loop];
#endif
}
SCHEDULER_UNLOCK(intSave);
}
LITE_OS_SEC_TEXT_INIT VOID OsCpupGuardCreator(VOID)
{
(VOID)LOS_SwtmrCreate(LOSCFG_BASE_CORE_TICK_PER_SECOND, LOS_SWTMR_MODE_PERIOD,
(SWTMR_PROC_FUNC)OsCpupGuard, &swtmrID, 0);
(VOID)LOS_SwtmrStart(swtmrID);
}
/*
* Description: initialization of CPUP
* Return : LOS_OK or Error Information
*/
LITE_OS_SEC_TEXT_INIT UINT32 OsCpupInit(VOID)
{
UINT32 size;
cpupMaxNum = LOSCFG_BASE_CORE_PROCESS_LIMIT;
#ifdef LOSCFG_CPUP_INCLUDE_IRQ
cpupMaxNum += OS_HWI_MAX_NUM;
#endif
/* every process has only one record, and it won't operated at the same time */
size = cpupMaxNum * sizeof(OsCpupCB);
g_cpup = (OsCpupCB *)LOS_MemAlloc(m_aucSysMem0, size);
if (g_cpup == NULL) {
return LOS_ERRNO_CPUP_NO_MEMORY;
}
(VOID)memset_s(g_cpup, size, 0, size);
cpupInitFlg = 1;
return LOS_OK;
}
LITE_OS_SEC_TEXT VOID OsCpupSet(UINT32 id)
{
g_cpup[id].id = id;
g_cpup[id].status = OS_CPUP_USED;
}
LITE_OS_SEC_TEXT VOID OsCpupClean(UINT32 id)
{
(VOID)memset_s((VOID *)&g_cpup[id], sizeof(OsCpupCB), 0, sizeof(OsCpupCB));
}
LITE_OS_SEC_TEXT_INIT VOID LOS_CpupReset(VOID)
{
UINT32 cpupIndex;
UINT32 maxNum = cpupMaxNum;
UINT16 loop;
UINT64 curCycle;
UINT32 intSave;
if (g_cpup == NULL) {
return;
}
cpupInitFlg = 0;
intSave = LOS_IntLock();
(VOID)LOS_SwtmrStop(swtmrID);
curCycle = OsGetCpuCycle();
for (loop = 0; loop < (OS_CPUP_HISTORY_RECORD_NUM + 1); loop++) {
cpuHistoryTime[loop] = curCycle;
}
for (cpupIndex = 0; cpupIndex < maxNum; cpupIndex++) {
g_cpup[cpupIndex].startTime = curCycle;
g_cpup[cpupIndex].allTime = curCycle;
for (loop = 0; loop < (OS_CPUP_HISTORY_RECORD_NUM + 1); loop++) {
g_cpup[cpupIndex].historyTime[loop] = curCycle;
}
}
#ifdef LOSCFG_CPUP_INCLUDE_IRQ
for (loop = 0; loop < LOSCFG_KERNEL_CORE_NUM; loop++) {
timeInIrqPerProcessSwitch[loop] = 0;
}
#endif
(VOID)LOS_SwtmrStart(swtmrID);
LOS_IntRestore(intSave);
cpupInitFlg = 1;
return;
}
LITE_OS_SEC_TEXT_MINOR VOID OsSetCpuCycle(UINT64 cycles)
{
startCycles = cycles;
return;
}
/*
* Description: get current cycles count
* Return : current cycles count
*/
LITE_OS_SEC_TEXT_MINOR UINT64 OsGetCpuCycle(VOID)
{
UINT32 high;
UINT32 low;
UINT64 cycles;
LOS_GetCpuCycle(&high, &low);
cycles = ((UINT64)high << HIGH_BITS) + low;
if (startCycles == 0) {
startCycles = cycles;
}
/*
* The cycles should keep growing, if the checking failed,
* it mean LOS_GetCpuCycle has the problem which should be fixed.
*/
LOS_ASSERT(cycles >= startCycles);
return (cycles - startCycles);
}
#ifdef LOSCFG_CPUP_INCLUDE_IRQ
STATIC VOID OsRemoveInterTimeFromPorcess(UINT32 runPID)
{
UINT16 loop;
UINT32 pid;
for (loop = 0; loop < LOSCFG_KERNEL_CORE_NUM; loop++) {
pid = OsCpuProcessIDGetUnsafe(loop);
if (pid != runPID) {
continue;
}
g_cpup[runPID].allTime -= timeInIrqPerProcessSwitch[loop];
timeInIrqPerProcessSwitch[loop] = 0;
}
}
#endif
/*
* Description: start process to get cycles count in current process begining
*/
LITE_OS_SEC_TEXT_MINOR STATIC VOID OsProcessCycleStart(VOID)
{
UINT32 pid;
if (cpupInitFlg == 0) {
return;
}
pid = LOS_GetCurrProcessID();
g_cpup[pid].id = pid;
g_cpup[pid].startTime = OsGetCpuCycle();
return;
}
/*
* Description: quit process and get cycle count
*/
LITE_OS_SEC_TEXT_MINOR STATIC VOID OsProcessCycleEnd(VOID)
{
UINT16 runTaskCount;
UINT32 runPID;
UINT64 cpuCycle;
LosProcessCB *runProcess = NULL;
if (cpupInitFlg == 0) {
return;
}
runProcess = OsCurrProcessGet();
runPID = runProcess->processID;
if (g_cpup[runPID].startTime == 0) {
return;
}
cpuCycle = OsGetCpuCycle();
runTaskCount = OS_PROCESS_GET_RUNTASK_COUNT(runProcess->processStatus);
g_cpup[runPID].allTime += (cpuCycle - g_cpup[runPID].startTime) * runTaskCount;
#ifdef LOSCFG_CPUP_INCLUDE_IRQ
OsRemoveInterTimeFromPorcess(runPID);
#endif
g_cpup[runPID].startTime = 0;
return;
}
/*
* Description: start process to get cycles count in current process ending
*/
LITE_OS_SEC_TEXT_MINOR VOID OsProcessCycleEndStart(UINT32 newID, UINT16 runTaskCount)
{
UINT32 runPID;
UINT64 cpuCycle;
OsCpupCB *cpup = NULL;
if (cpupInitFlg == 0) {
return;
}
LOS_ASSERT(runTaskCount != 0);
cpuCycle = OsGetCpuCycle();
runPID = LOS_GetCurrProcessID();
cpup = &g_cpup[runPID];
if (cpup->startTime != 0) {
cpup->allTime += (cpuCycle - cpup->startTime) * runTaskCount;
cpup->startTime = cpuCycle;
#ifdef LOSCFG_CPUP_INCLUDE_IRQ
OsRemoveInterTimeFromPorcess(runPID);
#endif
}
cpup = &g_cpup[newID];
cpup->id = newID;
cpup->startTime = cpuCycle;
return;
}
LITE_OS_SEC_TEXT_MINOR STATIC VOID OsCpupGetPos(UINT16 mode, UINT16 *curPosPointer, UINT16 *prePosPointer)
{
UINT16 curPos;
UINT16 tmpPos;
UINT16 prePos;
tmpPos = hisPos;
curPos = CPUP_PRE_POS(tmpPos);
/*
* The current postion has nothing to do with the CPUP modes,
* however, the previous postion differs.
*/
switch (mode) {
case CPUP_LAST_ONE_SECONDS:
prePos = CPUP_PRE_POS(curPos);
break;
case CPUP_LAST_TEN_SECONDS:
prePos = tmpPos;
break;
case CPUP_ALL_TIME:
/* fall-through */
default:
prePos = OS_CPUP_HISTORY_RECORD_NUM;
break;
}
*curPosPointer = curPos;
*prePosPointer = prePos;
return;
}
LITE_OS_SEC_TEXT_MINOR STATIC INLINE UINT32 OsCpuUsageParaCheck(UINT32 pid)
{
if (cpupInitFlg == 0) {
return LOS_ERRNO_CPUP_NO_INIT;
}
if (OS_PID_CHECK_INVALID(pid)) {
return LOS_ERRNO_CPUP_PID_INVALID;
}
/* weather the process is created */
if (g_cpup[pid].id != pid) {
return LOS_ERRNO_CPUP_PROCESS_NO_CREATED;
}
if (g_cpup[pid].status == OS_CPUP_UNUSED) {
return LOS_ERRNO_CPUP_PROCESS_NO_CREATED;
}
return LOS_OK;
}
LITE_OS_SEC_TEXT UINT32 OsHistorySysCpuUsageUnsafe(UINT16 mode)
{
UINT64 cpuCycleAll;
UINT64 idleCycleAll;
UINT32 cpup = 0;
UINT16 pos;
UINT16 prePos;
UINT32 idlePID;
if (cpupInitFlg == 0) {
return LOS_ERRNO_CPUP_NO_INIT;
}
OsProcessCycleEnd();
OsCpupGetPos(mode, &pos, &prePos);
cpuCycleAll = cpuHistoryTime[pos] - cpuHistoryTime[prePos];
idlePID = OsGetIdleProcessID();
idleCycleAll = g_cpup[idlePID].historyTime[pos] - g_cpup[idlePID].historyTime[prePos];
if (cpuCycleAll) {
cpup = (LOS_CPUP_PRECISION - (UINT32)((LOS_CPUP_SINGLE_CORE_PRECISION * idleCycleAll) / cpuCycleAll));
}
OsProcessCycleStart();
return cpup;
}
LITE_OS_SEC_TEXT_MINOR UINT32 LOS_HistorySysCpuUsage(UINT16 mode)
{
UINT32 cpup;
UINT32 intSave;
/* get end time of current process */
SCHEDULER_LOCK(intSave);
cpup = OsHistorySysCpuUsageUnsafe(mode);
SCHEDULER_UNLOCK(intSave);
return cpup;
}
LITE_OS_SEC_TEXT UINT32 OsHistoryProcessCpuUsageUnsafe(UINT32 pid, UINT16 mode)
{
UINT64 cpuCycleAll;
UINT64 cpuCycleCurProcess;
UINT16 pos;
UINT16 prePos;
UINT32 cpup = 0;
UINT32 ret;
OsCpupCB *processCpup = &g_cpup[pid];
ret = OsCpuUsageParaCheck(pid);
if (ret != LOS_OK) {
return ret;
}
OsProcessCycleEnd();
OsCpupGetPos(mode, &pos, &prePos);
cpuCycleAll = cpuHistoryTime[pos] - cpuHistoryTime[prePos];
cpuCycleCurProcess = processCpup->historyTime[pos] - processCpup->historyTime[prePos];
if (cpuCycleAll) {
cpup = (UINT32)((LOS_CPUP_SINGLE_CORE_PRECISION * cpuCycleCurProcess) / cpuCycleAll);
}
OsProcessCycleStart();
return cpup;
}
LITE_OS_SEC_TEXT_MINOR UINT32 LOS_HistoryProcessCpuUsage(UINT32 pid, UINT16 mode)
{
UINT32 cpup;
UINT32 intSave;
SCHEDULER_LOCK(intSave);
cpup = OsHistoryProcessCpuUsageUnsafe(pid, mode);
SCHEDULER_UNLOCK(intSave);
return cpup;
}
LITE_OS_SEC_TEXT UINT32 OsAllCpuUsageUnsafe(UINT16 maxNum, CPUP_INFO_S *cpupInfo, UINT16 mode, UINT16 flag)
{
UINT16 loop;
UINT16 index;
UINT16 pos;
UINT16 prePos;
UINT64 cpuCycleAll;
UINT64 cpuCycleCurProcess;
UINT16 numTmpMax = maxNum;
UINT16 numTmpMin = 0;
UINT16 numMax = g_processMaxNum;
if (cpupInitFlg == 0) {
return LOS_ERRNO_CPUP_NO_INIT;
}
if (cpupInfo == NULL) {
return LOS_ERRNO_CPUP_PROCESS_PTR_NULL;
}
if (maxNum == 0) {
return LOS_ERRNO_CPUP_MAXNUM_INVALID;
}
#ifdef LOSCFG_CPUP_INCLUDE_IRQ
if (flag == 0) {
numTmpMax += g_processMaxNum;
numTmpMin += g_processMaxNum;
numMax = cpupMaxNum;
}
#endif
if (numTmpMax > numMax) {
numTmpMax = numMax;
}
OsProcessCycleEnd();
OsCpupGetPos(mode, &pos, &prePos);
cpuCycleAll = cpuHistoryTime[pos] - cpuHistoryTime[prePos];
for (loop = numTmpMin; loop < numTmpMax; loop++) {
if (g_cpup[loop].status == OS_CPUP_UNUSED) {
continue;
}
index = loop - numTmpMin;
cpuCycleCurProcess = g_cpup[loop].historyTime[pos] - g_cpup[loop].historyTime[prePos];
cpupInfo[index].usStatus = g_cpup[loop].status;
if (cpuCycleAll) {
cpupInfo[index].uwUsage = (UINT32)((LOS_CPUP_SINGLE_CORE_PRECISION * cpuCycleCurProcess) / cpuCycleAll);
}
}
OsProcessCycleStart();
return LOS_OK;
}
LITE_OS_SEC_TEXT_MINOR UINT32 LOS_AllCpuUsage(UINT16 maxNum, CPUP_INFO_S *cpupInfo, UINT16 mode, UINT16 flag)
{
UINT32 intSave;
UINT32 ret;
SCHEDULER_LOCK(intSave);
ret = OsAllCpuUsageUnsafe(maxNum, cpupInfo, mode, flag);
SCHEDULER_UNLOCK(intSave);
return ret;
}
#ifdef LOSCFG_CPUP_INCLUDE_IRQ
LITE_OS_SEC_TEXT_MINOR VOID OsCpupIrqStart(VOID)
{
UINT32 high;
UINT32 low;
LOS_GetCpuCycle(&high, &low);
intTimeStart[ArchCurrCpuid()] = ((UINT64)high << HIGH_BITS) + low;
return;
}
LITE_OS_SEC_TEXT_MINOR VOID OsCpupIrqEnd(UINT32 intNum)
{
UINT32 high;
UINT32 low;
UINT64 intTimeEnd;
UINT32 cpuID = ArchCurrCpuid();
LOS_GetCpuCycle(&high, &low);
intTimeEnd = ((UINT64)high << HIGH_BITS) + low;
g_cpup[g_processMaxNum + intNum].id = intNum;
g_cpup[g_processMaxNum + intNum].status = OS_CPUP_USED;
timeInIrqPerProcessSwitch[cpuID] += (intTimeEnd - intTimeStart[cpuID]);
g_cpup[g_processMaxNum + intNum].allTime += (intTimeEnd - intTimeStart[cpuID]);
return;
}
#endif
#endif /* LOSCFG_KERNEL_CPUP */
#ifdef __cplusplus
#if __cplusplus
}
#endif /* __cplusplus */
#endif /* __cplusplus */
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