|15:30:39||time with ntpd off||39.001||39.002||-.001|
|15:31;45||start wapps running|
|15:33:0||start snap on wapp4|
|15:35:05||stopped data taking|
|15:38:00||start wapps, no snap running|
|15:42:09||stopped data taking||9.891||9.574||.317||.018|
|16:02:38||dd if=/dev/zero of=/export/wapp41/junk
transfer 6gb of data
|16:08:04||done with xfer||4.897||4.571||.326||.009|
|16:14:00||dd dev/zero to /tmp/junk
| dd dev/zero to /tmp/junk
1.2 gb transferred
Between the actions i measured the time and it remained stable.
The largest jump was when pulsar data taking (p2030 setup) was run with snap on wapp4. This caused a 300 ms jump. Transferring files /tmp (which is a journaled file system) cause a jump of about 55 ms.
When snap and data taking was run, the dual processor cpu was 68% busy on both cpus.
The slowing down must be coming from lost timer interrupts.