2015/4/13
Gem 5 - activate
SoC CAD
張力升
電機系, Department of Electrical Engineering
國立成功大學, National Cheng Kung University
Tainan, Taiwan, R.O.C
1
NCKU
SoC CAD

template <class Impl>
FullO3CPU<Impl>::ActivateThreadEvent::ActivateThreadEvent():
Event(CPU_Switch_Pri){
}


ActivateThreadEvent - construct
負責將CPU_Switch_Pri的值assign到Event裡
CpuEvent Definition:
CpuEvent::replaceThreadContext(ThreadContext *oldTc, ThreadContext
*newTc){
CpuEventList::iterator I
for (i = cpuEventList.begin(); i != cpuEventList.end(); i++) {
if ((*i)->tc == oldTc)
(*i)->tc = newTc;
}
}
// 把舊的thread更新為新者
Li-Sheng Chang, 張力升
SoC & ASIC Lab K- 2
NCKU
SoC CAD

ActivateThreadEvent繼承圖
ActivateThreadEvent 繼承之diagram
FullO3CPU<Impl>
ActivateThreadEvent
init
Li-Sheng Chang, 張力升
process
description
SoC & ASIC Lab
3
NCKU
SoC CAD

Member function - init (1/3)
template <class Impl>
void
FullO3CPU<Impl>::ActivateThreadEvent::init(int thread_num,
FullO3CPU<Impl> *thread_cpu)
{
tid = thread_num;
cpu = thread_cpu;
}
 負責初始化Event
Li-Sheng Chang, 張力升
SoC & ASIC Lab K- 4
NCKU
SoC CAD

Member function - process(2/3)
template <class Impl>
void
FullO3CPU<Impl>::ActivateThreadEvent::process()
{
cpu->activateThread(tid);
}

負責處理Event，並將activateThread(tid) 的值傳到Cpu
Li-Sheng Chang, 張力升
SoC & ASIC Lab K- 5
NCKU
SoC CAD

Member function (3/3)
template <class Impl>
const char *
FullO3CPU<Impl>::ActivateThreadEvent:: description() const
{
return "FullO3CPU \"Activate Thread\"";
}

將“FullO3CPU \”Activate Thread\“” 之值傳送回去
Li-Sheng Chang, 張力升
SoC & ASIC Lab K- 6
NCKU
SoC CAD

ThreadID active_threads
Definition:
if (FullSystem) {
active_threads = 1; }
else {
active_threads = params->workload.size();
}
/*反之則params寫
入active_threads*/
if (active_threads > Impl::MaxThreads) {
panic("Workload Size too large. Increase the 'MaxThreads' "
"constant in your O3CPU impl. file (e.g. o3/alpha/impl.hh) "
"or edit your workload size.");
}
Li-Sheng Chang, 張力升
SoC & ASIC Lab K- 7
NCKU
SoC CAD

ThreadID tid 繼承圖
ThreadID tid繼承之diagram
FullO3CPU<Impl>
activateThread
Li-Sheng Chang, 張力升
deactivateThread
SoC & ASIC Lab
8
NCKU
SoC CAD

ThreadID activate_threads
Definition:
template <class Impl>
void
FullO3CPU<Impl>::activateThread(ThreadID tid)
{
if (isActive == activeThreads.end()) {
DPRINTF(O3CPU, "[tid:%i]: Adding to active threads list\n",
tid);
activeThreads.push_back(tid);
}
}

將tid的值回傳
Li-Sheng Chang, 張力升
SoC & ASIC Lab K- 9
NCKU
SoC CAD
ThreadID deactivateThread
Definition:
template <class Impl>
void
FullO3CPU<Impl>::activateThread(ThreadID tid){
if (thread_it != activeThreads.end()) {
DPRINTF(O3CPU,"[tid:%i]: Removing from active threads list\n",
tid);
activeThreads.erase(thread_it);
}
}
 將thread_it的值刪去

Li-Sheng Chang, 張力升
SoC & ASIC Lab K- 10
NCKU
SoC CAD

activateContext
template <class Impl>
void
FullO3CPU<Impl>::activateContext(ThreadID tid, Cycles delay){
assert(!switchedOut());
//在此須先設定每個stage的運作
if (delay){
DPRINTF(O3CPU, “[tid:%i]: Scheduling thread context to activate ”
“on cycle %d\n”, tid, clockEdge(delay));
scheduleActivateThreadEvent(tid, delay);
} else { activateThread(tid); }
if (getDrainState() == Drainable::Drained)
return;
//不希望當cpu drained時把他喚醒，故僅標記及排程
if (lastActivatedCycle == 0 || lastActivatedCycle < curTick()) {
scheduleTickEvent(delay); /*假如time=0或最後的activation time is in the past，
進入下一個tick並喚醒擷取單位*/
activityRec.activity();
fetch.wakeFromQuiesce();
//記得要標記cpu尚未deschedule 的activity
Cycles cycles(curCycle() - lastRunningCycle);
if (cycles != 0) --cycles;
quiesceCycles += cycles;
lastActivatedCycle = curTick();
_status = Running; }}
Li-Sheng Chang, 張力升
SoC & ASIC Lab K- 11
NCKU
SoC CAD

activateContext - Drained
template <class Impl>
unsigned int
FullO3CPU<Impl>::drain(DrainManager *drain_manager){
// If the CPU isn‘t doing anything, then return immediately.
if (switchedOut()) {setDrainState(Drainable::Drained);
return 0; }
DPRINTF(Drain, “Draining...\n”);
setDrainState(Drainable::Draining) ;
if (!isDrained()) {
drainManager = drain_manager;
wakeCPU();
activityRec.activity();
DPRINTF(Drain, “CPU not drained\n”);
return 1;}
……….
}
Li-Sheng Chang, 張力升
SoC & ASIC Lab K- 12
NCKU
SoC CAD

activateContext - wakeup
template <class Impl>
void
FullO3CPU<Impl>::wakeup()
{
if (this->thread[0]->status() != ThreadContext::Suspended)
return;
this->wakeCPU();
}
DPRINTF(Quiesce, "Suspended Processor woken\n");
this->threadContexts[0]->activate();
Li-Sheng Chang, 張力升
SoC & ASIC Lab K- 13
NCKU
SoC CAD
activateContext - tick
template <class Impl>
void
FullO3CPU<Impl>::tick(){
DPRINTF(O3CPU, "\n\nFullO3CPU: Ticking main, FullO3CPU.\n");
assert(!switchedOut());
assert(getDrainState() != Drainable::Drained);
++numCycles;
fetch.tick();
decode.tick();
rename.tick();
iew.tick();
commit.tick(); //Tick each of the stages
……….
 FullO3CPU class, has each of the stages (fetch through commit) within it, as well as all of
the time buffers between stages.


The tick () function for the CPU is defined here

template <class Impl>
void
FullO3CPU<Impl>::TickEvent::process(){
cpu->tick();
}
Li-Sheng Chang, 張力升
SoC & ASIC Lab K- 14
2015/4/13
Gem 5 - python
SoC CAD
張力升
電機系, Department of Electrical Engineering
國立成功大學, National Cheng Kung University
Tainan, Taiwan, R.O.C
15
NCKU
SoC CAD

物件導向、直譯式電腦程式語言，具有近二十年的發展歷史，
成熟且穩定


python
語法簡捷和清晰，盡量使用無異義的英語單詞，與其它數程式設計語言
使用大括弧不一樣，它使用縮進來定義語句塊。
與Ruby、Perl等動態語言大多一樣，Python具備Garbage Collection
功能，能夠自動管理記憶體使用。
Python虛擬機本身幾乎可以在所有的OS中運行。
 使用一些諸如py2exe、PyPy、Pylnstaller之類的工具可以將Python原始碼轉
換成可以脫離Python解釋器執行的程式。

Li-Sheng Chang, 張力升
SoC & ASIC Lab
16
SoC CAD

NCKU
Python – alarm example
from Tkinter import *
class Alarm(Frame):
def repeater(self):
self.bell()
self.after(self.msecs, self.repeater)
def __init__(self):
Frame.__init__(self)
self.msecs = 1000
self.pack()
stopper = Button(self, text='Stop the beeps!', command=self.quit)
stopper.pack()
stopper.config(bg='navy', fg='white', bd=8)
self.stopper = stopper
self.repeater()
if __name__ == '__main__':
Alarm().mainloop()
Li-Sheng Chang, 張力升
SoC & ASIC Lab
17