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Increase calculation speed of LottoSync

Topic closed. 6 replies. Last post 12 years ago by Todd.

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MillionsWanted's avatar - 24Qa6LT

Norway
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December 10, 2004
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Posted: January 4, 2005, 1:56 pm - IP Logged

Here's an interesting link for for users of LottoSync who think it takes to long to calculate:

Level2 cache



This trick might help. Shouldn't hurt to try.

    Todd's avatar - Cylon 2.gif
    Chief Bottle Washer
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    Posted: January 4, 2005, 2:20 pm - IP Logged

    I think that's bogus information.  Windows XP doesn't touch the processor's internal cache.  Processors do indeed have an internal cache, and if anything, it would be manipulated through BIOS settings, not through the operating system.

     

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      Todd's avatar - Cylon 2.gif
      Chief Bottle Washer
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      Posted: January 4, 2005, 2:22 pm - IP Logged

      By the way, that's no cut on you MillionsWanted, I just want to be sure people don't go messing with their operating system's registry unnecessarily, because it is dangerous unless you know what you're doing.

       

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        MillionsWanted's avatar - 24Qa6LT

        Norway
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        Posted: January 4, 2005, 2:40 pm - IP Logged
        Quote: Originally posted by Todd on January 4, 2005

        I think that's bogus information.  Windows XP doesn't touch the processor's internal cache.  Processors do indeed have an internal cache, and if anything, it would be manipulated through BIOS settings, not through the operating system.






        I found several places that describes this feature.

        There's some exceptions. Sometimes WinXP finds the L2 cache value during installations, other times it doesn't.

        This link Adjust level 2 cache setting gives a better description.

        People need to check the CPU's L2 cache first(available on manufacturers site) and compare to what is registered in the Register. If the value of their CPU's L2 cache is 512 kbyte and the Register value is 256 kbyte they will earn something by changing to the correct value.
          hosni's avatar - hosni
          Escondido, CA
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          Posted: January 4, 2005, 4:53 pm - IP Logged
          Quote: Originally posted by MillionsWanted on January 4, 2005


          Here's an interesting link for for users of LottoSync who think it takes to long to calculate:
          Level2 cache This trick might help. Shouldn't hurt to try.



          Thanks for the input MW. Sure enough, my L2 Cache was sitting at 256 KB.......0. Changed L2 to 512.......200 and voila, noticable speed increase.

                Platinum John, hosni@lotterypost.com

          Retired Grumman Aerospace Corporation F-14 Tomcat AVIONICS Field Engineer Extraordinaire

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            Canada
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            Posted: January 5, 2005, 4:17 am - IP Logged

            This seems to apply to only MUCH older processors [not the new processors of the last 2 to 3 years]. After doing a quick google search that's what people are saying.:

            "According to the notes on regedit.com:
            "Note: This tweak is only useful for older processors with the cache located
            external to the CPU. ""

            'So it seems the best course of action is to leave it alone!'

            This from microsoft for win 2000 which probably applies to XP

            http://www.microsoft.com/resources/documentation/Windows/2000/server/reskit/en-us/Default.asp?url=/resources/documentation/windows/2000/server/reskit/en-us/core/fnec_evl_FHCJ.asp

            "Do not change the SecondLevelDataCache entry

            Some third-party sources have erroneously reported that modifying the SecondLevelDataCache registry entry in HKEY_LOCAL_MACHINE\System\CurrentControlSet
            \Control\Session Manager\Memory Management
            can enhance system performance. The second level (L2) cache is recognized by the operating system and is fully utilized regardless of the setting of this parameter."

            Also this from microsoft:

            "WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

            SecondLevelDataCache records the size of the processor cache, also known as the secondary or L2 cache. If the value of this entry is 0, the system attempts to retrieve the L2 cache size from the Hardware Abstraction Layer (HAL) for the platform. If it fails, it uses a default L2 cache size of 256 KB. If the value of this entry is not 0, it uses this value as the L2 cache size. This entry is designed as a secondary source of cache size information for computers on which the HAL cannot detect the L2 cache.

            This is not related to the hardware; it is only useful for computers with direct-mapped L2 caches. Pentium II and later processors do not have direct- mapped L2 caches. SecondLevelDataCache can increase performance by approximately 2 percent in certain cases for older computers with ample memory (more than 64 MB) by scattering physical pages better in the address space so there are not so many L2 cache collisions. Setting SecondLevelDataCache to 256 KB rather than 2 MB (when the computer has a 2 MB L2 cache) would probably have about a 0.4 percent performance penalty."

            http://support.microsoft.com/default.aspx?scid=kb;EN-US;q183063

            Lottosynch NEEDS RAW CPU MUSCLE POWER to speed things up.

              Todd's avatar - Cylon 2.gif
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              Posted: January 5, 2005, 7:31 am - IP Logged

              Vick,  Thanks very much for digging up all that info; that's exactly what I was trying to describe.  People should really take heed of that warning, because they can really screw up their PC if they change the wrong thing in the registry editor.

               

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