130 lines
2.7 KiB
C
130 lines
2.7 KiB
C
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#include <windows.h>
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#include <stdio.h>
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#include <conio.h>
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#include <stdlib.h>
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#define TOTAL_COUNT (100000000)
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//
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// DON'T UNCOMMENT THIS LINE UNTIL YOU'RE READY
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// TO RUN THE WHOLE TEST. YOU WON'T BE ABLE TO
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// BREAK IN UNTIL THE TEST ENDS!!!
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//
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#define GO_FOREVER (1)
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#define MAX_MEMORY (256)
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DWORD
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MyWorkerThread(
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PVOID ThreadParameter
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)
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/*++
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Pretend to be busy.
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--*/
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{
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ULONG i;
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PVOID TmpPtr = NULL;
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ULONG MemorySize;
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#ifdef GO_FOREVER
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while( 1 ) {
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#else
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for( i = 0; i < TOTAL_COUNT; i++ ) {
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#endif
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MemorySize = rand() % MAX_MEMORY;
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}
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return 0;
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}
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int
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__cdecl
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main( int argc, char *argv[])
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{
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ULONG i;
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DWORD ThreadId;
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SYSTEM_INFO SystemInfo;
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HANDLE MyHandle;
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HANDLE *HandlePtr = NULL;
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printf( "This program is for testing purposes only.\n" );
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printf( "It is designed to consume all available CPU cycles.\n" );
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printf( "\n" );
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printf( "IT WILL RENDER YOUR SYSTEM UNRESPONSIVE!\n" );
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printf( "\n" );
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printf( "Press the '+' key to continue, or any other key to exit.\n" );
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if( _getch() != '+' ) {
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printf( "Exiting...\n" );
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return;
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}
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printf( "working..." );
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//
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// Figure out how many CPUs we have. We'll want to create a thread
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// for each one so that there is no available resources.
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//
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GetSystemInfo( &SystemInfo );
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//
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// Allocate an array of handles for each one of the processors.
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//
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HandlePtr = (HANDLE *)malloc( sizeof(HANDLE) * SystemInfo.dwNumberOfProcessors );
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if( HandlePtr == NULL ) {
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printf( "We failed to allocate any memory.\n" );
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return;
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}
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//
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// Let this guy get lots of CPU time.
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//
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if (!SetPriorityClass(GetCurrentProcess(),REALTIME_PRIORITY_CLASS)) {
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printf("Failed to raise to realtime priority\n");
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}
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//
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// Now go create a bunch of threads so that we tie up all available time
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// on all CPUs.
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//
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for( i = 0; i < SystemInfo.dwNumberOfProcessors; i++ ) {
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HandlePtr[i] = CreateThread( NULL,
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0,
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MyWorkerThread,
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UIntToPtr( i ),
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CREATE_SUSPENDED,
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&ThreadId );
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if( HandlePtr[i] != NULL ) {
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SetThreadPriority( HandlePtr[i],
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THREAD_PRIORITY_TIME_CRITICAL );
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ResumeThread( HandlePtr[i] );
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}
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}
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//
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// Now wait for them to finish.
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//
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WaitForMultipleObjects( SystemInfo.dwNumberOfProcessors,
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HandlePtr,
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TRUE,
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INFINITE );
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}
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