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Speedup boot up sequence by defragmenting all key boot files.
7 April 2007

Open Registry by going to START-RUN and typing REGEDIT. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Dfrg\BootOptimizeFunction. In right hand panel look for Enable. Right click on it and set it 'Y' for enable. This is the way I have it set on my computer. This will help speedup boot time.

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posted by s я ϊ я α м . at 4:11 pm | Permalink 2 comments
Correctly set your level 2 cache and improve performance !!

Open Registry by going to START-RUN and typing REGEDIT. Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\SecondLevelDataCache. Based on the kind of CPU you have, this value should change. Here are some of the defaults. Intel Celeron - 128 , AMD Duron - 64. PII and Athalon: 512. Cyrix and AMD K6-3 256. Pentium IV-1024. Figure out what your CPU type is and what L2 cache it supports and set it accordingly. It is important to know what critics have to say about this tweak. Opinions vary and I have put following three articles that have been brought to my attention which may help you understand why it may not be effective in some situations:

Do not change the SecondLevelDataCache entry (from Microsoft technet article)
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.

(from Microsoft knowledge base item Q183063)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.

(From an arstechnica article) One of the most infamous NT tweaks since the introduction of NT4 has got to be the "L2 cache" tweak, a lone registry entry which stipulates the amount of L2 cache (or secondary cache) that the OS will make use of. Well, as with many things in life, the effects of this tweak are not so black and white. If you're using a processor that implements a direct-mapped L2 cache design (like Pentium I's), then this registry adjustment is indeed for you. However, if you own any Intel processor post-PI, or any modern AMD processor (K6-2 and newer), then your processor is using a set-associative L2 cache design, and thus you need not specify your L2 cache size. Let me explain.
If you choose not to futz with the registry key in question, the OS will call on the HAL (Hardware Abstraction Layer) for retrieval of the L2 cache size when you boot your computer. If this happens to fail, a default value of 256KB is used for all logon sessions on that boot session. This is where the myth that NT can only use 256KB of L2 cache comes from. But it's false. See, the HAL is able to retrieve the processor (L2) cache from any processor using the set-associative cache design, it's only the relatively few processors out there with direct-mapped L2 caches that the HAL won't chat it up with. Thus, this tweak only applies to a select number of people anymore (like people with Pentium I procs between 166-233MHz, as lower rated procs had only 256KB cache).


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posted by s я ϊ я α м . at 4:10 pm | Permalink 0 comments
Boost XP speed by changing real time clock priority.

Open Registry by going to START-RUN and typing REGEDIT. Navigate to [HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\PriorityControl]. If you see an entry by the name IRQ8Priority set it to a value "IRQ8Priority"=dword:00000001 if you don't then click on the right pane and add a new dword entry with given name.. IRQ8 is typically reserved for real time clock in most of the computers. Make sure thats the case (by going to device manager -> system devices -> system COMS/realtime clock -> properties -> resources tab , if it is set to another number try adding an entry with that number N as IRQNPriority) . Generally realtime clock priority boosting helps most but you are free to try others as well.

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posted by s я ϊ я α м . at 4:09 pm | Permalink 1 comments
Fine tune internet browsing speed : DNS resolution

Internet browsing is such an exciting and easy experience now a days that we have almost forgotten the amount of work that goes behind the scene to make this all happen. We only feel bad if we can't find something easily or have to wait for a long time (I have heard many people saying WWW stands for world wide wait not too long ago!!!) Well with changes in technology and falling prices we have far better hardware and software to do this job but fruits of fine tuning have always been great and would continue to remain so. One of the things that should happen before Internet connection would go through is DNS resolution.DNS stands for Domain Name Service. Even though XP does a fine job of handling DNS resolution, you may still gain by increase the DNS Cache size. To do this you would have to add following entries in registry. Save what is written below in say "dnstuning.reg" file and import it in REGISTRY but opening registry editor and going to IMPORT option from top menu.
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Dnscache\Parameters]
"CacheHashTableBucketSize"=dword:00000001
"CacheHashTableSize"=dword:00000180
"MaxCacheEntryTtlLimit"=dword:0000fa00
"MaxSOACacheEntryTtlLimit"=dword:0000012d

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posted by s я ϊ я α м . at 4:06 pm | Permalink 0 comments