Dear monks,

Here is my scenario: I have hundreds of plain text files, and they are 1,000 GB totally. My stask is very simple, do a sequential reading by <IN> once, and put some variables in Hash (maybe 20,000,000 records). To determine the bottleneck of my task, I perform two little experiments as below:

  1. simply read a file (500mb) sequentially by <IN> takes around 15 secs. After I add one line such as $hash{$_}=1, it takes me around 20 secs. ---> it's reasonable to think the bottle neck is CPU's computing power.
  2. After promoting my PERL's priority to High, the PERL thread's CPU utilization reduces to 90% only ---> maybe it implies that my system's IO is too slow to feed data to my CPU ?

I'm finding an utility/script/method to examine my real bottle neck IO (hardware) or CPU (perl script) ? It seems that the traditional Benchmark helps little. Any advice would be very very appreciated!

by the way, my system's hardware configuration is: Athlon 64 2800 with 2GB RAM. UDMA 133 IDE harddisk. OS Windows 2003.

20050404 Unconsidered by Corion. Was considered by RazorbladeBidet: Retitle: Determining the performance bottleneck on Windows (edit:45 keep:11 del:0)

In reply to How do I measure my bottle ? by cbrain

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