Break every 2 seconds for writing on hard drive of the computer.

Run LV2010 on a machine W7 Pro 64 bit CPU i5-2500 3.3 GHz and 8G of RAM.  The machine is around the age of 6 months.

I have a request I'm reading from a USB device and write to the hard disk.  The USB device does not know when my application writes to the hard drive, so I really doubt that the problem is there anywhere.  My application continuously collect and graph data from the USB device.  The device has a tampon in it and the State of the buffer is sent upward with the data contained in each package.  The State is still weak, because the computer has no trouble to the read buffer faster that the unit can charge upwards.  In other words, unless the PC is writing data to the hard drive.  When this happens, it works perfectly for about 2 seconds, then the buffer fills completely shot and overflows, then he just read more quickly down to zero.  This happens again and again, to repeatable intervals, which are about 2 seconds apart.  The only reason that would cause a buffer overrun, is that the PC is not read it fairly quickly.  On the slower computers of the past, I'd like to see that happen as the buffer would inch its way up slowly, when the PC was just too slow to keep up.  At the time it happened, record HD or not.  In this case, it comes quickly, and back down, as if the PC just took a short coffee break.  I even set the priority to high hoping the BONE would not pause, but alas, it makes no difference.  Does anyone know why a PC would do this during the recording of HD?  Thank you.

Is the code that is written on the hard disk in the same loop that acquires data?  Writing to the hard disk will always be slower than the other processes in the PC.  Your postal code so that we can see what you're doing.  You should use a producer/consumer architecture to transmit data through the queues of the loop for the acquisition of data for the file write loop.

Is it possible that this PC has anti-virus running on it is taken way too long to analyze all the files the PC's hard disk?

Tags: NI Software

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