Problem #1
I have a dtrace script which counts 2 aggregates - one aggregates the number of read bytes (@rb), the other, the number of write bytes (@wb).
I want to print the output: "
Simply outputting an aggregate by itself is easy, but I can't find any guide on printing the value of aggregate A / aggregate B, or placing the current value of the aggregates in variables, to allow integer arithmetic.
How can I calculate and output @rb / @wb in my script?
Problem #2
Similar issue - I want to show equivalent data per second. But data is sampled over the length of a call, which is typically << 1ms.
With integer arithmetic, I need to do the equivalent of
I have a dtrace script which counts 2 aggregates - one aggregates the number of read bytes (@rb), the other, the number of write bytes (@wb).
I want to print the output: "
@rb, @wb, (100 * @rb) / @wb (ratio as percentage)"Simply outputting an aggregate by itself is easy, but I can't find any guide on printing the value of aggregate A / aggregate B, or placing the current value of the aggregates in variables, to allow integer arithmetic.
How can I calculate and output @rb / @wb in my script?
Problem #2
Similar issue - I want to show equivalent data per second. But data is sampled over the length of a call, which is typically << 1ms.
With integer arithmetic, I need to do the equivalent of
normalize(@value * 1000000,self->microsecs) and not normalize(@value,self->microsecs/1000000) which won't work with integer maths (the latter value will be set to zero seconds). But how do I do this?