memtest.c File Reference

#include <ddk/ntddk.h>
#include "memtest.h"
#include <debug.h>

Include dependency graph for memtest.c:

Go to the source code of this file.

Functions
static VOID NTAPI	MonitorThread (PVOID Ignored)
VOID	StartMemoryMonitor ()
NTSTATUS NTAPI	DriverEntry (PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath)

Variables
HANDLE	MonitorThreadHandle

Function Documentation

DriverEntry()

NTSTATUS NTAPI DriverEntry	(	PDRIVER_OBJECT	DriverObject,
		PUNICODE_STRING	RegistryPath
	)

Definition at line 100 of file memtest.c.

{
    DbgPrint("\n===============================================\n Memory Manager Information and Test driver\n");
    DbgPrint("Time;Memory pages allocated;Memory pages free\n");
 
 
    StartMemoryMonitor();
 
    return STATUS_SUCCESS;
}

MonitorThread()

static VOID NTAPI MonitorThread ( PVOID  Ignored )

static

Definition at line 35 of file memtest.c.

{
    SYSTEM_PERFORMANCE_INFORMATION PerformanceInfo;
    ULONG Length;
    LARGE_INTEGER Interval, SystemTime;
 
    /* Main loop */
    while (TRUE)
    {
        Interval.QuadPart = -300 * 10000; // 300 ms
 
        /* Query information */
        if (ZwQuerySystemInformation(SystemPerformanceInformation,
            (PVOID) &PerformanceInfo,
            sizeof(SYSTEM_PERFORMANCE_INFORMATION),
            &Length) != STATUS_SUCCESS)
        {
            break;
        }
 
        /* Query current system time */
        KeQuerySystemTime(&SystemTime);
 
 
        DbgPrint("%I64d;%d;%d\n", SystemTime.QuadPart,
            PerformanceInfo.CommittedPages, PerformanceInfo.AvailablePages);
 
        /* Wait for a bit. */
        KeDelayExecutionThread(KernelMode, FALSE, &Interval);
    }
 
    DPRINT("Finishing monitoring thread.\n");
 
    PsTerminateSystemThread(0);
}

Referenced by StartMemoryMonitor().

StartMemoryMonitor()

VOID StartMemoryMonitor

(

)

Definition at line 73 of file memtest.c.

{
    NTSTATUS Status;
 
    Status = PsCreateSystemThread(
        &MonitorThreadHandle,
        THREAD_ALL_ACCESS,
        NULL,
        NULL,
        NULL,
        MonitorThread,
        NULL);
 
    if (!NT_SUCCESS(Status))
    {
        DPRINT1("Failed to start a monitoring thread\n");
        return;
    }
}

Referenced by DriverEntry().

Variable Documentation

MonitorThreadHandle

HANDLE MonitorThreadHandle

Definition at line 30 of file memtest.c.

Referenced by StartMemoryMonitor().