Perf Counter stats don't track calls to produce()

[Notou]

What happened?

The Performance Counter variables tracking the number of produced items (nproduced, avg_nproduced, and var_nproduced)
only account for the return value of the block's work function.

It doesn't account for situations where produce(port, num) is called inside of that work function.
This means that, in this case, the reported nproduced stat is incorrect.

In the most extreme case, where a block only advertises its produced items through calls to produce(), the perf counter stats stay at 0.

gnuradio/gnuradio-runtime/lib/block_detail.cc

Lines 303 to 306 in 58725d5

	d = nproduced - d_avg_nproduced;
	d_ins_nproduced = nproduced;
	d_avg_nproduced = d_avg_nproduced + d / d_pc_counter;
	d_var_nproduced = d_var_nproduced + d * d;

System Information

OS: Linux Mint 21.3
GR Installation Method: Conda

GNU Radio Version

3.10 (maint-3.10)

Specific Version

3.10.9.2

Steps to Reproduce the Problem

The issue can be seen from even a simple embedded python block.

Just replace the return value in the default work function by consume and produce calls:

def work(self, input_items, output_items):
    """example: multiply with constant"""
    output_items[0][:] = input_items[0] * self.example_param
    self.consume(0, len(output_items[0]))
    self.produce(0, len(output_items[0]))
    return 0

And insert it in whatever flowgraph.
Running gr-ctrlport-monitor, you can see nproduced, avg_nproduced, and var_nproduced at 0 for that block.

Relevant log output

No response