rostests/drivers/memtest/memtest.c

   1 /*
   2  * Memory Manager Information and Test driver
   3  *
   4  * Copyright 2006 Aleksey Bragin <alekset@reactos.org>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Library General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Library General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Library General Public
  17  * License along with this library; see the file COPYING.LIB.
  18  * If not, write to the Free Software Foundation,
  19  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20  */
  21
  22 /* INCLUDES *******************************************************************/
  23
  24 #include <ddk/ntddk.h>
  25 #include "memtest.h"
  26
  27 //#define NDEBUG
  28 #include <debug.h>
  29
  30 HANDLE MonitorThreadHandle;
  31
  32 /* FUNCTIONS ***********************************************************/
  33
  34 static VOID NTAPI
  35 MonitorThread(PVOID Ignored)
  36 {
  37     SYSTEM_PERFORMANCE_INFORMATION PerformanceInfo;
  38     ULONG Length;
  39     LARGE_INTEGER Interval, SystemTime;
  40
  41     /* Main loop */
  42     while (TRUE)
  43     {
  44         Interval.QuadPart = -300 * 10000; // 300 ms
  45
  46         /* Query information */
  47         if (ZwQuerySystemInformation(SystemPerformanceInformation,
  48             (PVOID) &PerformanceInfo,
  49             sizeof(SYSTEM_PERFORMANCE_INFORMATION),
  50             &Length) != STATUS_SUCCESS)
  51         {
  52             break;
  53         }
  54
  55         /* Query current system time */
  56         KeQuerySystemTime(&SystemTime);
  57
  58
  59         DbgPrint("%I64d;%d;%d\n", SystemTime.QuadPart,
  60             PerformanceInfo.CommittedPages, PerformanceInfo.AvailablePages);
  61
  62         /* Wait for a bit. */
  63         KeDelayExecutionThread(KernelMode, FALSE, &Interval);
  64     }
  65
  66     DPRINT("Finishing monitoring thread.\n");
  67
  68     PsTerminateSystemThread(0);
  69 }
  70
  71
  72 VOID
  73 StartMemoryMonitor()
  74 {
  75     NTSTATUS Status;
  76
  77     Status = PsCreateSystemThread(
  78         &MonitorThreadHandle,
  79         THREAD_ALL_ACCESS,
  80         NULL,
  81         NULL,
  82         NULL,
  83         MonitorThread,
  84         NULL);
  85
  86     if (!NT_SUCCESS(Status))
  87     {
  88         DPRINT1("Failed to start a monitoring thread\n");
  89         return;
  90     }
  91 }
  92
  93 /* PUBLIC FUNCTIONS ***********************************************************/
  94
  95 /*
  96  * DriverEntry
  97  */
  98 NTSTATUS
  99 NTAPI
 100 DriverEntry(PDRIVER_OBJECT DriverObject,
 101             PUNICODE_STRING RegistryPath)
 102 {
 103     DbgPrint("\n===============================================\n Memory Manager Information and Test driver\n");
 104     DbgPrint("Time;Memory pages allocated;Memory pages free\n");
 105
 106
 107     StartMemoryMonitor();
 108
 109     return STATUS_SUCCESS;
 110 }