portstat gives traceback when the counters exceed 10^14

[rraghav-cisco]

Description

When the interface counters exceed 10^14, the portstat utility gives traceback. So the "show interface counter" gives the traceback.

Traceback (most recent call last):
  File "/usr/local/bin/portstat", line 675, in <module>
    main()
  File "/usr/local/bin/portstat", line 635, in main
    cnstat_dict, ratestat_dict = portstat.get_cnstat_dict()
  File "/usr/local/bin/portstat", line 151, in get_cnstat_dict
    self.collect_stat()
  File "/usr/local/lib/python3.9/dist-packages/utilities_common/multi_asic.py", line 157, in wrapped_run_on_all_asics
    func(self,  *args, **kwargs)
  File "/usr/local/bin/portstat", line 161, in collect_stat
    cnstat_dict, ratestat_dict = self.get_cnstat()
  File "/usr/local/bin/portstat", line 215, in get_cnstat
    cnstat_dict[port] = get_counters(port)
  File "/usr/local/bin/portstat", line 182, in get_counters
    fields[pos] = str(int(fields[pos]) + int(fvs[counter_name]))
ValueError: invalid literal for int() with base 10: '1.5530548686308e+14'

root@yy39top-lc4:/home/cisco# 

Steps to reproduce the issue

1. Run trafffic in the DUT interface enough to raise the counter values to above 10^14.
2. Run any command that reads the counters: "show inter counter", "sonic-clear counter", "portstat"
3. All of them give traceback.

Describe the results you received

Pls see the description.

Describe the results you expected

We need the output to show the counter values instead of traceback.

Additional information you deem important (e.g. issue happens only occasionally)

Output of show version

The version of the DUT doesn't seem to matter.