Summary:
Computes the struct field access variation based on each field access
count.
Adds a flag to control the report thresholds.
Updates struct-simple.cpp with variance report output.
Reviewers: aizatsky
Subscribers: kubabrecka, zhaoqin, llvm-commits, eugenis, vitalybuka, kcc, bruening
Differential Revision: http://reviews.llvm.org/D20914
llvm-svn: 271734
Summary:
Adds a new option -snapshot_step controlling the frequency distribution for
an 8-level series of samples using each bit of each shadow byte.
Implements accumulation from each level to the next higher level at the
specified frequency.
Adds storage of the 8 series of samples using CircularBuffer instances.
Fixes an error in the circular buffer data structure where a static
object's destructor will be called too early.
Prints the results out at the end in a simple manner to give us something
to start with.
Updates the workingset-samples test to test the new feature.
Reviewers: aizatsky
Subscribers: vitalybuka, zhaoqin, kcc, eugenis, llvm-commits, kubabrecka
Differential Revision: http://reviews.llvm.org/D20833
llvm-svn: 271683
Summary:
Adds support for creating a separate thread for performing "sideline"
actions on a periodic basis via an itimer. A new class SidelineThread
implements this feature, exposing a sampling callback to the caller.
Adds initial usage of sideline sampling to the working set tool. For now
it simply prints the usage at each snapshot at verbosity level 1. Adds a
test of this behavior. Adds a new option -record_snapshots to control
whether we sample and a new option -sample_freq to control the periodicity
of the sampling.
Reviewers: aizatsky
Subscribers: vitalybuka, zhaoqin, kcc, eugenis, llvm-commits, kubabrecka
Differential Revision: http://reviews.llvm.org/D20751
llvm-svn: 271682
Summary:
Adds custom flag support to EfficiencySanitizer's runtime library.
Adds an initial flag cache_line_size which will be used by multiple tools.
Reviewers: aizatsky, vitalybuka
Subscribers: llvm-commits, eugenis, kcc, zhaoqin, aizatsky, kubabrecka
Differential Revision: http://reviews.llvm.org/D20478
llvm-svn: 270256
Qin Zhao