Use separate timers for different pass iterations
Use separate timers for different pass iterations

Summary: To distinguish different runs, keep track of how often a pass has run already, and adapt the timer tag.

Reviewed By: minjang

Differential Revision: D23463945

fbshipit-source-id: 7a1fad802b3abc812f7317fd8c9c33d6ad84a5a4

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