Intel® Trace Analyzer 9.1 Update 2 User and Reference Guide
A mesh pattern indicates tagged items in the Quantitative Timeline.
This is what the Quantitative Timeline for the poisson_icomm.single.stf trace file with the tagged MPI_Finalize function looks like:
Filtering in the Quantitative Timeline works the same way as in any other Chart. The result for filtering MPI_Finalize looks like: