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Questions tagged [systrace]

The systrace tool helps analyze the performance of an Android application.

The systrace tool helps analyze the performance of your application by capturing and displaying execution times of your applications processes and other Android system processes.

The tool combines data from the Android kernel such as the CPU scheduler, disk activity and application threads to generate an HTML report that shows an overall picture of an Android device’s system processes for a given period of time.

More info at the android developers help page.

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Unable to view HTML trace report generated by Systrace tool in Android SDK

I am trying to generate trace reports with Systrace tool in the Android SDK, but I cant view the report in the browser. It is blank and does not contain any information. I read in some forums that I need to open the report in Chrome browser, I…
Zohaib Hassan
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Android DDMS v22.0.1 unable to generate a systrace using Droid Razor 4.1.2

I've selected several of the trace tags and when I run the trace (from DDMS) I get the following output: Unexpected error while collecting system trace. Unable to find trace start marker 'TRACE:': error opening…
jchristof
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What does VerifyClass inside Systrace mean?

I´m looking at the systrace generated by my app and I have identified a frame that is taking too long. This is caused by a RecyclerView's onCreateViewHolder when inflating my item view. The item view is as flat as posible with ConstraintLayout. But…
Oscar Méndez
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Error running systrace tool in ADB using a Jelly Bean 4.1 emulator on Windows 7

How can I run systrace to show its html output? After watching the Google I/O 2012 talk "For Butter or Worse" I am having trouble getting systrace to work on Windows 7 using the emulator running Jelly Bean 4.1. I did the following: Installed Python…
Ryan R
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systrace: Invalid trace result format for HTML output

When I run python systrace.py --time=10 -o mynewtrace.html gfx The following error occurs Starting tracing (10 seconds) Tracing completed. Collecting output...
Exception in thread Thread-11: Traceback (most recent call last): File…
Virendra Kumar
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Determining and preventing Android Scheduling delay

I am currently trying to improve the fluidity of my app's animation. I ran Android systrace and found several scheduling delay alerts which according to systrace contributes to jank. Unfortunately I am unable to comprehend the other data presented…
coapp
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Cause of performTraversals recursion, long egl buffer swap times

I am measuring the performance of my app with systrace on a non-rooted Nexus 4 on Android 4.2.2. I'm seeing a few things in the reports that don't make sense to me and I'm wondering if they might be systrace bugs or if anyone might know of any…
peterb_sm
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React Native profiling. Systrace not showing JS and Native Modules Thread

I have followed the guide for Profiling Android UI Performance I run the following cmd: /usr/local/Cellar/android-sdk/24.4.1_1/platform-tools/systrace/systrace.py --time=10 -o trace.html shred gfx view -a com.navigation. I am able to get a trace…
René Madsen
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Android Systrace: Unexpected error (Conversion = ';')

I have been learning how to use Systrace following instructions on how to use Systrace (from the Android Developers website). I've tried using both the GUI and the Terminal (command line). Using the GUI: I received an error after the trace had…
Farbod Salamat-Zadeh
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Systrace '/sys/kernel/debug/tracing/tracing_on' does not exist

I'm trying to use the systrace tool on the command line on my non-rooted Nexus 4 device running Lollipop 5.1.1. It appears that when I try to run commands such as: systrace.py --time=4 -o testtrace.html sched app freq idle load I get the following…
lumt
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Android triple buffering - expected behavior?

I'm investigating the performance of my app since I noticed it dropping some frames while scrolling. I ran systrace (on a Nexus 4 running 4.3) and noticed an interesting section in the output. Everything is fine at first. Zooming in on the left…
peterb_sm
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"Total frames" and "Janky frames" in dumpsys gfxinfo report

I am calculating my Application performance using dumpsys gfxinfo command. After making performance improvement changes in my App code, I observed that Total number of frames and Janky frames count got drastically reduced. What does decrease in…
Shanker
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React-native Android Systrace HTML is blank in Ubuntu 14.04

I collected a trace of my React-Native based Android app using systrace.py util from Android SDK into an html file. When I open this html trace file in either Chrome 50.0.2661.86 (64 bit), or Firefox 45.0.2, I see blank screen and a few JavaScript…
user1817498
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Performance drop of Android animation when device stays still but is touched

My app changes the properties of some really simple views (rotation, translation) per frame. I used systrace, as advised by Android performance articles, to check if I was dropping frames. Something really unexpected came up. When the device was…
Petrakeas
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Getting 'Permission denied (13)' when trying to use systrace on Moto X with KitKat

I'm following http://developer.android.com/tools/debugging/systrace.html but can't run systrace on my Moto X (KitKat). Any ideas? $ python systrace.py --time=10 -o mynewtrace.html gfx view wm error opening…
Foxichu
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