Update boot image and system server profiles
This is a conservative tuning for the last profile update (commit 5b70220f) which regressed a few metrics (b/130553966). The numbers below are quoated relative to the sate before that update. =Perf numbers= The boot image compilation artifacts are 17MiB smaller (art/vdex/oat for arm and arm64). System server .art file is 100KiB smaller. Startup and memory number are within the noise. Startup shows 0.72% improvement. However that's most likely noise. The tests were run with: - atest google/perf/app-startup/hermetic-apps/cold-dropcache-lock-test - atest google/perf/app-startup/non-hermetic-apps/cold-dropcache-lock-test - atest google/perf/memory/memory-test - atest google/perf/app-startup/benchmark-app-hermetic/cold-dropcache-lock-test - atest google/perf/app-startup/third-party-apps/cold-dropcache-stable-test =Profile metrics= Boot: - methods and classes used by at least 9% of the sampled (non unique) applications (see below for more explanations) - 1.13% of hot methods added, 33.77% removed - 0.65% of classes added, 21.61% removed - 29256 hot methods in the profile (vs 43429 in the old one) - 8681 classes in the profile (vs 10985 in the old one) Preloaded clases: - classes used by at least 20% of sampled applications during startup - 1.5% added, 0.3% removed - 7601 classes in the profile (vs 7516 in the old one) System server: - methods and classes used on at least 5% of sampled devices - system server is speed compile and the image classes are the most relevant - 4% classes added, 23% of classes removed - 2819 classes in the profile (vs 3418 in the old one) =Data sample= - 35000+ (non unique) applications contributed to the final profile - these were spread across 4000+ (non unique) devices - 'non unique' means that the same app or the same device (or a combination of both) could have contributed to the final profile multiple times Bug: 122068885 Bug: 130553966 Test: m, build, boot, atest startup-tests (cherry picked from commit 439305ca) Merged-In: Ic61ed2784af034ed4ae4bc8346ed67c6bed04152 Change-Id: I1fc3b301bf80bfc7dda3540c5a204af8321279bf
Loading
Please register or sign in to comment