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Implement process and thread priority adjustments (#691)

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This commit is contained in:
Cameron Gutman
2023-01-03 21:05:00 -06:00
committed by GitHub
parent 997e8c6e5a
commit cc688c7845
8 changed files with 128 additions and 2 deletions
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52
src/platform/windows/misc.cpp
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@@ -13,9 +13,12 @@
#include <winuser.h>
#include <ws2tcpip.h>
#include <userenv.h>
#include <dwmapi.h>
#include <timeapi.h>
// clang-format on
#include "src/main.h"
#include "src/platform/common.h"
#include "src/utility.h"
namespace bp = boost::process;
@@ -470,4 +473,53 @@ bp::child run_unprivileged(const std::string &cmd, boost::filesystem::path &work
}
}
void adjust_thread_priority(thread_priority_e priority) {
int win32_priority;
switch(priority) {
case thread_priority_e::low:
win32_priority = THREAD_PRIORITY_BELOW_NORMAL;
break;
case thread_priority_e::normal:
win32_priority = THREAD_PRIORITY_NORMAL;
break;
case thread_priority_e::high:
win32_priority = THREAD_PRIORITY_ABOVE_NORMAL;
break;
case thread_priority_e::critical:
win32_priority = THREAD_PRIORITY_HIGHEST;
break;
default:
BOOST_LOG(error) << "Unknown thread priority: "sv << (int)priority;
return;
}
if(!SetThreadPriority(GetCurrentThread(), win32_priority)) {
auto winerr = GetLastError();
BOOST_LOG(warning) << "Unable to set thread priority to "sv << win32_priority << ": "sv << winerr;
}
}
void streaming_will_start() {
// Enable MMCSS scheduling for DWM
DwmEnableMMCSS(true);
// Reduce timer period to 1ms
timeBeginPeriod(1);
// Promote ourselves to high priority class
SetPriorityClass(GetCurrentProcess(), HIGH_PRIORITY_CLASS);
}
void streaming_will_stop() {
// Demote ourselves back to normal priority class
SetPriorityClass(GetCurrentProcess(), NORMAL_PRIORITY_CLASS);
// End our 1ms timer request
timeEndPeriod(1);
// Disable MMCSS scheduling for DWM
DwmEnableMMCSS(false);
}
} // namespace platf