Test4Theory@home: Computation errors

Since we added the 64bit theory application, a number of tasks are failing with Computation Error. This is due to three reasons.

• The need for Hardware-assisted virtualization for 64bit
• Additional checks for issues that were not previously detected e.g. idling VMs. A technology change that still requires some hardening for all the issues that we experience when running on random machines around the world.

In the past 24 hours 71.79% of hosts returned a successful task using v2619.31 but 35.38% failed tasks with 7.18% returning both successful and unsuccessful tasks. This suggests that things are working but we still have some improvements to make.

To help the situation, please could everyone periodically (no more than once per day) visit your account page and click on the Task View link in the Computing and credit section to view the results of your tasks. If you do see a computation error, click on the task to see the exit status code and the logging output.

The breakdown of failures by exit code is as follows.

• 35.14% -1073740791
• 27.17% 206
• 18.84% 194
• 6.16% 207
• 4.35% 255
• 3.26% -2135228415
• 2.54% 1
• 2.17% 203
• 2.17% 5
• 1.45% -186
• 0.72% 197
• 0.36% -2147467259 0.36% -185

We will address each one of these in subsequent posts and once we have arrived at a final solution, the issue will either be fixed to stop it occurring or an entry will be added to the FAQ to explain what is going on.

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