reactos/rostests/drivers/memtest/memtest.c

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/*
* Memory Manager Information and Test driver
*
* Copyright 2006 Aleksey Bragin <alekset@reactos.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; see the file COPYING.LIB.
* If not, write to the Free Software Foundation,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* INCLUDES *******************************************************************/
#include <ddk/ntddk.h>
#include "memtest.h"
//#define NDEBUG
#include <debug.h>
HANDLE MonitorThreadHandle;
/* FUNCTIONS ***********************************************************/
static VOID NTAPI
MonitorThread(PVOID Ignored)
{
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);
}
VOID
StartMemoryMonitor()
{
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;
}
}
/* PUBLIC FUNCTIONS ***********************************************************/
/*
* DriverEntry
*/
NTSTATUS
NTAPI
DriverEntry(PDRIVER_OBJECT DriverObject,
PUNICODE_STRING RegistryPath)
{
DbgPrint("\n===============================================\n Memory Manager Information and Test driver\n");
DbgPrint("Time;Memory pages allocated;Memory pages free\n");
StartMemoryMonitor();
return STATUS_SUCCESS;
}