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Boosted priority of main synergy threads to be very high (highest

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realtime priority).  After some testing it appears that anything
less than this can starve synergy in some circumstances, preventing
it from forwarding messages to clients.  This is a rather risky
change since synergy can now virtually take over a system if it
behaves badly.  This change only affects windows systems since
lib/arch of other platforms don't yet attempt to boost priority.
This commit is contained in:
crs 2003-05-03 12:37:03 +00:00
parent 42ea6306f6
commit 8d9134f93a
3 changed files with 44 additions and 27 deletions
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67
lib/arch/CArchMultithreadWindows.cpp
View File

@ -348,35 +348,52 @@ CArchMultithreadWindows::cancelThread(CArchThread thread)
void void
CArchMultithreadWindows::setPriorityOfThread(CArchThread thread, int n) CArchMultithreadWindows::setPriorityOfThread(CArchThread thread, int n)
{ {
struct CPriorityInfo {
public:
DWORD m_class;
int m_level;
};
static const CPriorityInfo s_pClass[] = {
{ IDLE_PRIORITY_CLASS, THREAD_PRIORITY_IDLE },
{ IDLE_PRIORITY_CLASS, THREAD_PRIORITY_LOWEST },
{ IDLE_PRIORITY_CLASS, THREAD_PRIORITY_BELOW_NORMAL },
{ IDLE_PRIORITY_CLASS, THREAD_PRIORITY_NORMAL },
{ IDLE_PRIORITY_CLASS, THREAD_PRIORITY_ABOVE_NORMAL },
{ IDLE_PRIORITY_CLASS, THREAD_PRIORITY_HIGHEST },
{ NORMAL_PRIORITY_CLASS, THREAD_PRIORITY_LOWEST },
{ NORMAL_PRIORITY_CLASS, THREAD_PRIORITY_BELOW_NORMAL },
{ NORMAL_PRIORITY_CLASS, THREAD_PRIORITY_NORMAL },
{ NORMAL_PRIORITY_CLASS, THREAD_PRIORITY_ABOVE_NORMAL },
{ NORMAL_PRIORITY_CLASS, THREAD_PRIORITY_HIGHEST },
{ HIGH_PRIORITY_CLASS, THREAD_PRIORITY_LOWEST },
{ HIGH_PRIORITY_CLASS, THREAD_PRIORITY_BELOW_NORMAL },
{ HIGH_PRIORITY_CLASS, THREAD_PRIORITY_NORMAL },
{ HIGH_PRIORITY_CLASS, THREAD_PRIORITY_ABOVE_NORMAL },
{ HIGH_PRIORITY_CLASS, THREAD_PRIORITY_HIGHEST },
{ REALTIME_PRIORITY_CLASS, THREAD_PRIORITY_IDLE },
{ REALTIME_PRIORITY_CLASS, THREAD_PRIORITY_LOWEST },
{ REALTIME_PRIORITY_CLASS, THREAD_PRIORITY_BELOW_NORMAL },
{ REALTIME_PRIORITY_CLASS, THREAD_PRIORITY_NORMAL },
{ REALTIME_PRIORITY_CLASS, THREAD_PRIORITY_ABOVE_NORMAL },
{ REALTIME_PRIORITY_CLASS, THREAD_PRIORITY_HIGHEST },
{ REALTIME_PRIORITY_CLASS, THREAD_PRIORITY_TIME_CRITICAL}
};
static const size_t s_pMax = sizeof(s_pClass) / sizeof(s_pClass[0]) - 1;
static const size_t s_pBase = 8; // index of normal priority
assert(thread != NULL); assert(thread != NULL);
DWORD pClass = NORMAL_PRIORITY_CLASS; size_t index = s_pBase - n;
if (n < 0) { if (index < 0) {
switch (-n) { // lowest priority
case 1: n = THREAD_PRIORITY_ABOVE_NORMAL; break; index = 0;
case 2: n = THREAD_PRIORITY_HIGHEST; break;
default:
pClass = HIGH_PRIORITY_CLASS;
switch (-n - 3) {
case 0: n = THREAD_PRIORITY_LOWEST; break;
case 1: n = THREAD_PRIORITY_BELOW_NORMAL; break;
case 2: n = THREAD_PRIORITY_NORMAL; break;
case 3: n = THREAD_PRIORITY_ABOVE_NORMAL; break;
default: n = THREAD_PRIORITY_HIGHEST; break;
} }
break; else if (index > s_pMax) {
// highest priority
index = s_pMax;
} }
} SetPriorityClass(thread->m_thread, s_pClass[index].m_class);
else { SetThreadPriority(thread->m_thread, s_pClass[index].m_level);
switch (n) {
case 0: n = THREAD_PRIORITY_NORMAL; break;
case 1: n = THREAD_PRIORITY_BELOW_NORMAL; break;
case 2: n = THREAD_PRIORITY_LOWEST; break;
default: n = THREAD_PRIORITY_IDLE; break;
}
}
SetPriorityClass(thread->m_thread, pClass);
SetThreadPriority(thread->m_thread, n);
} }
void void

2
lib/synergy/CPrimaryScreen.cpp
View File

@ -40,7 +40,7 @@ void
CPrimaryScreen::mainLoop() CPrimaryScreen::mainLoop()
{ {
// change our priority // change our priority
CThread::getCurrentThread().setPriority(-3); CThread::getCurrentThread().setPriority(-13);
// run event loop // run event loop
try { try {

2
lib/synergy/CSecondaryScreen.cpp
View File

@ -38,7 +38,7 @@ void
CSecondaryScreen::mainLoop() CSecondaryScreen::mainLoop()
{ {
// change our priority // change our priority
CThread::getCurrentThread().setPriority(-7); CThread::getCurrentThread().setPriority(-13);
// run event loop // run event loop
try { try {