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Author SHA1 Message Date
Andrea Di Biagio 4269d64b20 [llvm-mca] Initialize each element in vector TimelineView::UsedBuffers to a default invalid buffer descriptor. NFCI 
Also change the default buffer size for UsedBuffer entries to -1 (i.e. "unknown
size"). No functional change intended.

llvm-svn: 340830
 2018-08-28 15:07:11 +00:00
Andrea Di Biagio d17d371c40 [llvm-mca][TimelineView] Force the same number of executions for every entry in the 'wait-times' table. 
This patch also uses colors to highlight problematic wait-time entries.
A problematic entry is an entry with an high wait time that tends to match (or
exceed) the size of the scheduler's buffer.

Color RED is used if an instruction had to wait an average number of cycles
which is bigger than (or equal to) the size of the underlying scheduler's
buffer.
Color YELLOW is used if the time (in cycles) spend waiting for the
operands or pipeline resources is bigger than half the size of the underlying
scheduler's buffer.
Color MAGENTA is used if an instruction does not consume buffer resources
according to the scheduling model.

llvm-svn: 340825
 2018-08-28 14:27:01 +00:00
Matt Davis 10aa09f008 [llvm-mca] Move views and stats into a Views subdir. NFC. 
llvm-svn: 340645
 2018-08-24 20:24:53 +00:00