Slow and Jerky tuning after installing 1.2

Tim,
I am a prospect customer thus have no practical experience with Flex but I have some experience tuning systems.  Try some of these tips out which may help.

1.  I see your using an Nvidia video card.  Make sure your your at default settings by restoring to default.  Turn off vertical sync - this is a culprit that affects input lag.  Some applications are very picky on many of these settings in the Nvidia console.  ATI and Nvidia cards will have different affect with different video card settings.. even though those applications utilize DirectX

2.  If your using Windows 7 or Windows 8 change your power options profile to High Performance.
This will unpark your cores.  When the OS detects minimal usage it will park cores (not use them). This is great for energy savings but has a detrimental impact on applications that are sensitive to latency.  Audio and video applications are most affected.  Windows 7 does NOT manage this well via the High Performance Profile and have found that you need to use 3rd party utilities to force the OS to unpark the cores... Another way is to turn off energy saving routines in the bios like C0, C1, etc. stepping.

3.  Go into your bios and select Sync All Cores rather than auto.   They key benefit to doing this is syncing all clock ratios to the same ratio.   Many high performance motherboards make this default setting but other motherboards do not sync the cores to save on power.  This has a significant affect with some applications - again those that are latency sensitive. 

4.  No matter how much memory you have make sure you have a page file set to an appropriate size.  I will not get into the complexities as to why but you will introduce unneeded page faults when dealing with any high i/o application.  Move the page file to a secondary drive OR SSD if you have one.  This will translate into latency.

5.  Make sure you NIC card is forcing full duplex and the correct port speed.  Many NIC cards / routers do not properly detect a proper port duplex or speed.  It will typically default to 1/2 duplex when this occurs and will increase latency under load.  This will translate into latency in the UI.

6.  If your using Gigabit, make sure you definitely force the duplex and correct port speed.  Low quality cabling that can not sustain a Gigabit connection will attempt to bump the speed down and again cause latency when the reduction in speed occurs.  This will translate into latency in the UI.

7.  Exclude the Flex application from any software firewalls your using on the PC.  Flex application is a bit streaming application.  Like any bit streamed application packets dropped or delayed translate into latency (as part of error correction)  --- same reason for the other NIC changes.  I would also suggest excluding the Flex binaries from any anti virus.

All the above will improve performance but may not solve your issue... Hopefully it helps...


 It also does not preclude the need for the application to be optimized to default / common settings which the above I realize are not..