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| author | crupest <crupest@outlook.com> | 2021-03-19 14:27:01 +0800 |
|---|---|---|
| committer | crupest <crupest@outlook.com> | 2021-03-19 14:27:01 +0800 |
| commit | ac32eebb6cad203e7a45834d3dc90b639e3d6ed3 (patch) | |
| tree | f2af5189ae5555d128d8952220357d9230ac83d0 /works/life/operating-system-challenge/2 | |
| parent | ec72d12002c6d3b707a014645c0da1b397dc7ee4 (diff) | |
| download | crupest-ac32eebb6cad203e7a45834d3dc90b639e3d6ed3.tar.gz crupest-ac32eebb6cad203e7a45834d3dc90b639e3d6ed3.tar.bz2 crupest-ac32eebb6cad203e7a45834d3dc90b639e3d6ed3.zip | |
import(life): Finish OS challenge 2.
Diffstat (limited to 'works/life/operating-system-challenge/2')
| -rw-r--r-- | works/life/operating-system-challenge/2/README.md | 5 | ||||
| -rw-r--r-- | works/life/operating-system-challenge/2/effect.png | bin | 0 -> 179599 bytes | |||
| -rw-r--r-- | works/life/operating-system-challenge/2/main.cpp | 73 |
3 files changed, 78 insertions, 0 deletions
diff --git a/works/life/operating-system-challenge/2/README.md b/works/life/operating-system-challenge/2/README.md index e8316ad..86672f5 100644 --- a/works/life/operating-system-challenge/2/README.md +++ b/works/life/operating-system-challenge/2/README.md @@ -3,3 +3,8 @@ > 
Translation: Write a program and make each core of your CPU get a different but regular usage rate graph.
+
+Code is in `main.cpp`. Remember to not compile it with O2 optimization, or my loop will be eliminated.
+
+Final effect:
+
diff --git a/works/life/operating-system-challenge/2/effect.png b/works/life/operating-system-challenge/2/effect.png Binary files differnew file mode 100644 index 0000000..984a3da --- /dev/null +++ b/works/life/operating-system-challenge/2/effect.png diff --git a/works/life/operating-system-challenge/2/main.cpp b/works/life/operating-system-challenge/2/main.cpp new file mode 100644 index 0000000..a497442 --- /dev/null +++ b/works/life/operating-system-challenge/2/main.cpp @@ -0,0 +1,73 @@ +#include <Windows.h>
+#include <cmath>
+
+DWORD WINAPI Thread1(_In_ LPVOID lpParameter) {
+ int i;
+ while (true) {
+ i++;
+ }
+ return 0;
+}
+
+DWORD WINAPI Thread2(_In_ LPVOID lpParameter) {
+ while (true) {
+ for (long long i = 0; i < 5000000000; i++)
+ ;
+ Sleep(10000);
+ }
+
+ return 0;
+}
+
+DWORD WINAPI Thread3(_In_ LPVOID lpParameter) {
+ while (true) {
+ for (int i = 0; i < 4000000; i++)
+ ;
+ Sleep(10);
+ }
+
+ return 0;
+}
+
+DWORD WINAPI Thread4(_In_ LPVOID lpParameter) {
+ LARGE_INTEGER frequency;
+ QueryPerformanceFrequency(&frequency);
+
+ LARGE_INTEGER count;
+ QueryPerformanceCounter(&count);
+
+ double current_y = 0;
+
+ while (true) {
+ for (int i = 0; i < 3000000.0 * (1.0 + current_y); i++)
+ ;
+ Sleep(10 * (1 - current_y));
+
+ LARGE_INTEGER new_count;
+ QueryPerformanceCounter(&new_count);
+
+ auto s = (new_count.QuadPart - count.QuadPart) / frequency.QuadPart;
+ current_y = std::sin(s / 30.0 * 2 * 3.1415926535) * 0.6;
+ }
+
+ return 0;
+}
+
+int main() {
+ HANDLE thread1 = CreateThread(NULL, 0, Thread1, NULL, 0, NULL);
+ HANDLE thread2 = CreateThread(NULL, 0, Thread2, NULL, 0, NULL);
+ HANDLE thread3 = CreateThread(NULL, 0, Thread3, NULL, 0, NULL);
+ HANDLE thread4 = CreateThread(NULL, 0, Thread4, NULL, 0, NULL);
+
+ SetThreadAffinityMask(thread1, 1);
+ SetThreadAffinityMask(thread2, 1 << 1);
+ SetThreadAffinityMask(thread3, 1 << 2);
+ SetThreadAffinityMask(thread4, 1 << 3);
+
+ WaitForSingleObject(thread1, INFINITE);
+ WaitForSingleObject(thread2, INFINITE);
+ WaitForSingleObject(thread3, INFINITE);
+ WaitForSingleObject(thread4, INFINITE);
+
+ return 0;
+}
|
