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Issue metadata

Status: Duplicate
Owner:
Last visit > 30 days ago
Closed: Mar 2017
Components:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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181.3% regression in cheets_SystemRawImageSize/bytes_vendor_raw_img on cros-elm at 30150000930900001:30210000932800000

Project Member Reported by hctsai@chromium.org, Mar 6 2017

Issue description

Performance dashboard identified a 181.3% regression in cheets_SystemRawImageSize/bytes_vendor_raw_img on cros-elm at revision range 30150000930900001:30210000932800000. Graph: https://chromeperf.appspot.com/report?masters=ARC&bots=cros-elm&tests=cheets_SystemRawImageSize%2Fbytes_vendor_raw_img&checked=bytes_vendor_raw_img%2Cbytes_vendor_raw_img_ref%2Cref&rev=30210000932800000

 
The range is wide (9309 to 9328) due to DUT replacement on test lab. Try firing the same job of old versions on cautotest for filling old data first.
'create job' in cautotest seems to be broken. Try download each image files and use mount_gp_image to inspect the vendor image size.
Accidentally clear the log of the bisection process. 
The result shows that the regression is between
R58-9322.0.0 (ARC 3766636)
R58-9323.0.0 (ARC 3768724)

https://android-build-uber.corp.google.com/repo.html?last_bid=3766636&bid=3768724&branch=git_mnc-dr-arc-dev
3766636 and 3768724 in branch: MNC DR ARC Dev

3768724	platform/vendor/unbundled_google/libs/ndk_translation	Y	e978bd3a	Victor Khimenko	Victor Khimenko	Implement [v,]fork/execve syscalls
3768627	platform/vendor/unbundled_google/packages/CloudDpcPrebuilt	Y	5a1c458a	CloudDpc Builder	CloudDpc Builder	CloudDpc for ARC++ MNC release (v42600)
https://mpmbrowse.corp.google.com/packageinfoz?package=mobile%2Fandroid%2Fwork%2Fclouddpc

Looks like the CloudDpc for ARC++ image grows for about 3M bytes or so. Not sure why it could generate such number regression in the vendor raw img. Keep investigating.
Mergedinto: 698495
Status: Duplicate (was: Untriaged)

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