A few tips for achieving optimum client performance:
On all operating systems:
On non-unix platforms:
- Disable fancy screen savers.
On Windows, the OpenGL screen savers are particularly CPU intensive.
If you can't do without a "cool" screen saver on Windows, use the
screen saver multiplexor included with the client which forces the
screen saver of your choice to run at a lower priority.
- Try comparing all cores ('dnetc -bench' from the command line) and
ensure that the client is really auto-selecting the fastest core.
(If its not, please send a message to firstname.lastname@example.org to that
- For contests like RC5-64, request larger work units. Smaller work
units require the client to spend more time saving completed work
and fetching new work, both to disk (when a single work unit is
finished) and to the network (when the buffer is filled)
- Don't configure the client to fetch and flush after every work unit.
- If your machine frequently crashes or is powered down without warning,
consider using the checkpoint feature. Though the checkpoint takes
time away from crunching, it preserves the work already completed.
- Consider using a (personal) web proxy that blocks animated advertising
on web pages.
- Don't use the machine for anything else. };8)
- close unused applications, because some (including MS-Word 8)
might eat a significant amount of CPU power.
On Windows (95, 98, ME, NT, 2000)
- Disable "processor cycling" in the advanced settings of the "Energy
Saver" control panel (if this option exists on your machine). This
option slows down the processor when the machine is left idle.
Disabling it has doubled the key rate on a G4.
- When the machine is not in use, make the client the frontmost
application, which gets the most CPU share.
For GPU Clients
- Disable "Power saving" features in the control panel
- Disable animations (sliding and fading menus, Active Desktop,
icon animators, mouse-tracking animations)
- Minimize the client window. When minimized, the client does not
need to update its window, and can run more efficiently.
- Watch out for applications that steal an inordinate amount of CPU
time. Some applications written using a Windows Timer event can
consume all available CPU, but at a higher priority than dnetc.
Other applications can get into a "spin loop" retrying a dropped
network connection or other unavailable resource.
- Increase the client priority setting (Main Menu Option 3->Option 4).
- Use larger packets. The client is setup by default to prefer larger packets for GPU clients, you can increase it somewhat more if desired. However if you are connecting to a personal proxy, you may need to change it's configuration to request larger packets.