(small error) wrong time measurement?

[weikengchen]

In FlexSC/test/oram/TestCircuitOramRec.java, after each write,

Flag.sw.startTotal();
client.write(client.baseOram.lib.toSignals(element), scData);
double t = Flag.sw.stopTotal();
Flag.sw.addCounter();

We increase the counter.

In FlexSC/src/util/StopWatch.java, the default value of the counter is:

long counter = 1;

flush() also makes it back to 1.

However, to print the result:

System.out.println(elapsedTimeTotal / 1000000000.0 / counter + "\t"

So, if we do experiments for 128 writes, the result is the total divided by 129.

I am doing experiments for 10 writes (for very big input), the result is divided by 11 (kind of problematic).

It seems that Flag StopWatch with a counter is only used to measure the Circuit ORAM.
So I think I can submit a PR to reduce 1 counter increasement.

This also affects the ObliVMGC library because the code is the same. (maybe no need to fix that one)
https://github.com/oblivm/ObliVMGC/tree/master/java/com/oblivm/backend

[weikengchen]

It has been merged. Closed.