1007008 - [Tarako][Performance]Play music and use dialer app simultaneously, music and dialer keypad animation will lag

Status: RESOLVED WONTFIX

(Firefox OS Graveyard :: Performance, defect, P2)

Description

[Mike Lien[:mlien]]

[Device]
  Tarako
---------------------------------------------
[Reproduction build] - 0429pac + PVT v1.3T
  Gaia      746934a1e331b9ce578bd9fbdb4614d950baf765
  Gecko     https://hg.mozilla.org/releases/mozilla-b2g28_v1_3t/rev/771fedd3e904
  BuildID   20140506164003
  Version   28.1
---------------------------------------------
[Reproduce Steps]
  1. Launch Music app -> Play music
  2. Go to homescreen -> Launch Dialer app
  3. Keypad -> Input some number or characters
---------------------------------------------
[Expected Result]
  Music, keypad sound and animation are smooth
---------------------------------------------
[Actual Result]
  1. Music will lag
  2. Keypad animation will lag
  3. Characters will delay to appear
---------------------------------------------
[Reproduce Rate]
  80%

Comment 1

[Joe Cheng [:jcheng] (please needinfo)]

ni? Dkuo for further comments

Comment 2

[Mike Lien[:mlien]]

weird behavior, after I reboot device, this performance issue only can be reproduced while pressing keypad rapidly
suspect due to many high memory pressure action before even processes are all killed
I will try to find a reliable STR

Comment 3

[bhavana bajaj [:bajaj]]

(In reply to Mike Lien[:mlien] from comment #2)
> weird behavior, after I reboot device, this performance issue only can be
> reproduced while pressing keypad rapidly
> suspect due to many high memory pressure action before even processes are
> all killed
> I will try to find a reliable STR

Removing from blocking nom till we find reliable STR, also added qawanted for the same.

Comment 4

[Montoya Clemmons (MClemmons)]

(In reply to bhavana bajaj [:bajaj] from comment #3)
> (In reply to Mike Lien[:mlien] from comment #2)
> > weird behavior, after I reboot device, this performance issue only can be
> > reproduced while pressing keypad rapidly
> > suspect due to many high memory pressure action before even processes are
> > all killed
> > I will try to find a reliable STR
> 
> Removing from blocking nom till we find reliable STR, also added qawanted
> for the same.

Prerequisites:

Have battery at or below 35 percent

STR
1. Take SIM card out of Device and start device
2. Swipe from E.me page to homescreen with Music App and Tap Music
3. Tap Artist 311 to autoplay song 'Down'
4. Let music play 3-6 seconds then Tap homescreen and tap Dialer App
5. Press dialer buttons 

Actual:
Music deteriorates almost immediately as crackling/break-up to the song occurs. Keypad animation is slow and characters selected in a normal pattern display slowly. 

Expected:
Music, keypad sound and animation are smooth

Other notes:
Battery life was 35% during first repro testing. After 3 repros, battery life fell to 17%. Power save was not enabled. After 2 more repros (#4-5) battery life fell to 15%.

Repro Rate: 
6/6 - 100 percent

Device: Tarko 1.3T MOZ
BuildID: 20140507014006
Gaia: 25a17d9d7143977ea9a81ed310098e326609d248
Gecko: 68a2f24960d2
Version: 28.1
Firmware Version: sp6821a-gonk4.0-4-29

Comment 5

[Dominic Kuo [:dkuo]]

If I remembered correctly, dialer started to use Web Audio to play the key tones from 1.3, and that's probably something will cause performance regression because the audio context use a different way to play the sounds, and maybe the nodes are not correctly disconnected after we tapped the keypad rapidly. Also, I guess the cpu loading should be high when this happens, we can find out which process/app occupies the cpu first then dig the root cause in that app.

Comment 6

[Mike Lien[:mlien]]

I found that while lag happening, b2g process and dialer app consume almost remaining CPU time
           PID CPU%     VSS     RSS PCY UID      Name
         Music  51%  69840K  22260K  fg app_1273 /system/b2g/plugin-container
           b2g  36% 137424K  36440K  fg root     /system/b2g/b2g
Communications   4%  66924K  16376K  fg app_1149 /system/b2g/plugin-container

Comment 7

[BMO Automation]

Firefox OS is not being worked on