fix(tmo): modify calculation algorithm

[cheney-lin]

What type of PR is this?

Enhancements

What this PR does / why we need it:

Which issue(s) this PR fixes:

Special notes for your reviewer:

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 50 lines in your changes missing coverage. Please review.

Project coverage is 55.90%. Comparing base (3269ac6) to head (e7597fa).

Files with missing lines	Patch %	Lines
pkg/util/cgroup/manager/cgroup.go	0.00%	31 Missing ⚠️
pkg/util/cgroup/manager/v1/fs_linux.go	0.00%	10 Missing ⚠️
pkg/util/cgroup/manager/v2/fs_linux.go	0.00%	8 Missing ⚠️
...ins/memory/dynamicpolicy/policy_advisor_handler.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #700      +/-   ##
==========================================
+ Coverage   55.80%   55.90%   +0.10%     
==========================================
  Files         594      594              
  Lines       67830    67873      +43     
==========================================
+ Hits        37850    37943      +93     
+ Misses      25956    25893      -63     
- Partials     4024     4037      +13     

Flag	Coverage Δ
unittest	55.90% <0.00%> (+0.10%)	⬆️

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