Flame graphs are used to visualize hierarchical data, like call stacks.
Timestamps collected by coreboot can be processed to resemble
profiler-like output, and thus can be feed to flame graph generation
tools.
Generating flame graph using https://github.com/brendangregg/FlameGraph:
cbmem -S > trace.txt
FlameGraph/flamegraph.pl --flamechart trace.txt > output.svg
TEST=Run on coreboot-enabled device and extract timestamps using
-t/-T/-S options
Signed-off-by: Jakub Czapiga <jacz@semihalf.com>
Change-Id: I3a4e20a267e9e0fbc6b3a4d6a2409b32ce8fca33
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62474
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
48f6c2b46f