This commit addds a tool to find the bottleneck virtio device by
analyzing the output of trace-cmd. This tool analyzes what processes
crosvm's vcpu process waited for, for how long time. For example, if the
vcpu processes are mostly waiting for vitio-blk process, the bottleneck
is likely to be the blk. If the vcpu processes are mostly waiting for
other vcpu processes or often preempted by other processes, the
bottleneck is likely to be the processor.
See README.md for the details.
BUG=b:302240202
TEST=cargo test
Change-Id: I98cff9e1158cf7980d522e549edef002630763b4
Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/4891880
Reviewed-by: Keiichi Watanabe <keiichiw@chromium.org>
Commit-Queue: Takaya Saeki <takayas@chromium.org>
87f08e43c8