Part VI Tuning for Performance and Scalability in Visual Studio .NET

Painting PDF417 in Visual Studio .NET Part VI Tuning for Performance and Scalability
Part VI Tuning for Performance and Scalability
PDF417 Reader In VS .NET
Using Barcode Control SDK for .NET framework Control to generate, create, read, scan barcode image in Visual Studio .NET applications.
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: mdma0 mdma1 *mdma2 udma0 udma1 udma2 udma3 udma4
Encode PDF-417 2d Barcode In .NET
Using Barcode maker for .NET framework Control to generate, create PDF 417 image in Visual Studio .NET applications.
Here the command reports the model, configuration, drive geometry (cylinders, heads, sectors), track size, sector size, buffer size, supported DMA mode, PIO mode, and so on Now lets test the disk sub-system using the following command:
Scanning PDF 417 In .NET Framework
Using Barcode decoder for .NET framework Control to read, scan read, scan image in .NET framework applications.
/usr/local/sbin/hdparm -Tt /dev/hda
Encoding Bar Code In .NET Framework
Using Barcode encoder for Visual Studio .NET Control to generate, create barcode image in VS .NET applications.
You will see results similar to this:
Barcode Scanner In .NET Framework
Using Barcode decoder for .NET framework Control to read, scan read, scan image in .NET applications.
/dev/hda: Timing buffer-cache reads: Timing buffered disk reads: 128 MB in 101 seconds = 12673 MB/sec 64 MB in 1727 seconds = 371 MB/sec
PDF 417 Generator In C#
Using Barcode generation for .NET framework Control to generate, create PDF 417 image in Visual Studio .NET applications.
Of course, your numbers will vary based on your drive and controller subsystem However, this is the untuned state of your drive subsystem The -T option tells hdparam to test the cache subsystem (that is, the memory, CPU, and buffer cache) The -t tells hdparam to report stats on the drive (/dev/hda) by reading data not in the cache Run this command a few times and taken an average of the MB/sec reported for your drive This is roughly the performance state of your drive subsystem In this example the 371 MB/sec is the read performance, which is quite low
Drawing PDF417 In .NET Framework
Using Barcode maker for ASP.NET Control to generate, create PDF 417 image in ASP.NET applications.
Tuning multiple sector mode for your hard disk
Generate PDF 417 In Visual Basic .NET
Using Barcode drawer for .NET Control to generate, create PDF-417 2d barcode image in .NET framework applications.
Review the hdparam -i /dev/hda command output and look for MaxMultSect value In this example, it is 16 Recall that the hdparam /dev/hda command showed that multcount value to be 0 (off) This means that multiple sector mode (that is IDE block mode) is turned off
Print Bar Code In .NET Framework
Using Barcode printer for VS .NET Control to generate, create barcode image in .NET framework applications.
Note
Print Code 128C In Visual Studio .NET
Using Barcode creation for Visual Studio .NET Control to generate, create Code 128B image in VS .NET applications.
Multiple sector mode is a feature of most modern IDE hard drives It allows the drive to transfer multiple drive sectors per I/O interrupt By default it is turned off However, most modern drives can perform 2, 4, 8, or 16 sector transfers per I/O interrupt So, if you set this mode to the maximum possible value for your drive, which is shown by the MaxMultiSect value, you should see throughput increase of anywhere from 5 percent to 50 percent or more Also, you will reduce the operating system overhead by 30 to 50 percent
Create Bar Code In Visual Studio .NET
Using Barcode generator for Visual Studio .NET Control to generate, create bar code image in Visual Studio .NET applications.
In this example the MaxMultiSect value is 16 so we can use the -m option of hdparam tool to set this and see how performance increases Run the following command:
Generate Code 93 Extended In Visual Studio .NET
Using Barcode generator for .NET Control to generate, create Code 9/3 image in Visual Studio .NET applications.
/usr/local/sbin/hdparm -m16 /dev/hda
Paint GTIN - 12 In Java
Using Barcode drawer for Java Control to generate, create UPC Code image in Java applications.
22 Speeding Up Apache
Drawing Barcode In Visual C#
Using Barcode printer for VS .NET Control to generate, create bar code image in VS .NET applications.
Running the performance test by using the hdparam -tT /dev/hda command displays the change For the example system, the change is as follows:
ANSI/AIM Code 39 Creation In VB.NET
Using Barcode creation for Visual Studio .NET Control to generate, create Code 39 image in VS .NET applications.
/dev/hda: Timing buffer-cache reads: Timing buffered disk reads: 128 MB in 101 seconds = 12673 MB/sec 64 MB in 1653 seconds = 387 MB/sec
Draw GS1 - 13 In VS .NET
Using Barcode generation for ASP.NET Control to generate, create European Article Number 13 image in ASP.NET applications.
The performance of the drive has gone up from 371 MB/sec to 387 MB/sec Not much but not bad Perhaps you will see a change similar to this as well Chances are you can do lot better than that with your drive if your drive and controller are fairly new You can probably achieve 20 to 30MB/second! Be forewarned, however, that when poking around with hdparam you might damage your data, so, as mentioned before, back up your data before playing with the drive hardwarespecific options discussed below If hdparam reported that the I/O support setting is 16-bit for your system and you have a fairly new (one or two years old) drive subsystem, you should try 32-bit I/O support You can set this using the -c option for hdparam This option has three values: 0 Enables default 16-bit I/O support 1 Enables 32-bit support 3 Enables 32-bit support with a special synchronization sequence required by many IDE/EIDE chipset It is also the value that works well with most systems Set the options as follows:
Bar Code Generator In Java
Using Barcode generation for Java Control to generate, create barcode image in Java applications.
/usr/local/sbin/hdparm -m16 -c3 /dev/hda
Print DataMatrix In C#.NET
Using Barcode creator for Visual Studio .NET Control to generate, create Data Matrix image in .NET framework applications.
Notice the -m16 option from earlier was used and that -c3 to enable 32-bit I/O support was added Running the program with -t option shows the following results:
Barcode Recognizer In .NET Framework
Using Barcode reader for Visual Studio .NET Control to read, scan read, scan image in Visual Studio .NET applications.
GS1 - 12 Creator In Visual C#.NET
Using Barcode encoder for Visual Studio .NET Control to generate, create GS1 - 12 image in VS .NET applications.