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Issue 843953 link

Starred by 2 users

Issue metadata

Status: Fixed
Owner:
Closed: May 2018
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux , Windows , Mac
Pri: 2
Type: Bug-Regression



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Regression : In 'Performance' section, 'Summary' tab appears blank after stopping the recording within 5 seconds.

Reported by avsha...@etouch.net, May 17 2018

Issue description

Chrome Version : 68.0.3432.3 (Official Build) 5aacd4d4350de37f394edd3095576d2bc7daf56c-refs/branch-heads/3432@{#6} 32/64-bit
OS : Mac(10.12.6, 10.13.1, 10.13.5), Windows(7, 8, 8.1, 10), Linux(14.04 LTS)

What steps will reproduce the problem?
1. Launch chrome, take a fresh profile and open devtools on NTP.
2. Navigate to 'Performance' tab in devtools and click on 'Record' button.
3. Stop the recording within 5 seconds and observe the 'Summary' tab at the bottom.

Actual Result : 'Summary' tab appears black after stopping the recording within 5 seconds. 

Expected Result : 'Summary' tab should show recorded details even when recording stopped in short duration. 

This is a regression issue, broken in M-67 and providing the bisect using Per-Revision script:
Good Build : 67.0.3382.0 (Revision : 546347) 
Bad Build : 67.0.3383.0 (Revision : 546671)

Change Log URL :
https://chromium.googlesource.com/chromium/src/+log/b75c75d3c87c585ca36017b88d39b193a36d9cfc..47a447390a1ce2454b9fd80214a959911c2f541d

Suspect : https://chromium.googlesource.com/chromium/src/+/47a447390a1ce2454b9fd80214a959911c2f541d

@dgozman : Could you please check whether this is caused with respect to your change, if not please help us in assigning it to the right owner.

Note : 
1. Issue is also observed in latest Canary build #68.0.3433.0
 
Actual_Result.mp4
422 KB View Download
Expected_Result.mp4
458 KB View Download
Labels: ReleaseBlock-Stable
marking as RBS, please change if required.
Cc: dgozman@chromium.org
Owner: alph@chromium.org
Alph, mind taking a look?

Comment 3 by gov...@chromium.org, May 17 2018

M67 Stable promotion is coming VERY soon. Your bug is labelled as Beta  ReleaseBlock, pls make sure to land the fix and request a merge into the release branch ASAP.  Thank you.

Comment 4 by alph@chromium.org, May 17 2018

Labels: -Pri-1 -ReleaseBlock-Stable Pri-2
We do not show main track on the flamechart and the details when there's no essential events. We should probably fix it but it's definitely not a stable blocker.
Project Member

Comment 5 by bugdroid1@chromium.org, May 18 2018

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/195775fd3465dedf166e98df68e8639725c8b8a2

commit 195775fd3465dedf166e98df68e8639725c8b8a2
Author: Alexei Filippov <alph@chromium.org>
Date: Fri May 18 19:52:36 2018

DevTools: Always show the main track on Perf panel

...even when there's no events in there.

BUG= 843953 

Change-Id: I9d5789428d58b89b791eb4c43325d1ef3e4b086f
Reviewed-on: https://chromium-review.googlesource.com/1065236
Commit-Queue: Alexei Filippov <alph@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#559999}
[modify] https://crrev.com/195775fd3465dedf166e98df68e8639725c8b8a2/third_party/blink/renderer/devtools/front_end/timeline/TimelineFlameChartDataProvider.js

Comment 6 by alph@chromium.org, May 18 2018

Status: Fixed (was: Assigned)
Summary: Regression : In 'Performance' section, 'Summary' tab appears blank after stopping the recording within 5 seconds. (was: Regression : In 'Performance' section, 'Summary' tab appears black after stopping the recording within 5 seconds.)

Comment 7 by avsha...@etouch.net, May 21 2018

Labels: TE-Verified-68.0.3436.0 TE-Verified-M68
Update : 
Retested above issue in latest Canary build #68.0.3436.0 on Windows(7,8,8.1,10), Mac(10.12.6, 10.13.1, 10.13.5) and Linux(14.04 LTS) OS and the issue is fixed. Now, summary details are shown as expected even after stopping the recording within 5 seconds. Kindly review an attached screen-cast.

Thank you..!
Canary_behaviour.mp4
431 KB View Download

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