天道酬勤,学无止境

systrace

Android Systrace No such file or directory

Here's the error message D:\Programming\Tools\ADT_bundle\sdk\platform-tools\systrace>python systrace.py Traceback (most recent call last): File "systrace.py", line 315, in <module> main() File "systrace.py", line 64, in main os.execv(legacy_script, sys.argv) OSError: [Errno 2] No such file or directory I look into systrace.py, it seems that the legacy_script "systrace-legacy.py" is missing on the file system. I have read several related posts on stackoverflow, and I've already put directory containing adb in the %PATH%. The problem still exists. I'm writting to ask if any way to solve this

2022-03-15 16:00:35    分类:问答    android   python   systrace

How do I use async_start and async_stop in systrace/atrace for Android

I want to capture Systrace report on my Android phone while doing automated testing. It is unknown how long the testing will take, so I can't specify the --time period for the Systrace. Digging deeper in to the systrace.py, I found out that systrace is using atrace to get the kernel logs. I used adb shell atrace --help and got the following output: usage: atrace [options] [categories...] options include: -a appname enable app-level tracing for a comma separated list of cmdlines -b N use a trace buffer size of N KB -c trace into a circular buffer -k fname,... trace the listed kernel functions

2022-02-10 21:28:37    分类:问答    android   linux-kernel   trace   systrace   ftrace

Systrace |Android 4.1.1(Galaxy S3 I747UCDLK3) 上没有 /sys/kernel/debug/tracing 目录(Systrace |No /sys/kernel/debug/tracing directory on Android 4.1.1(Galaxy S3 I747UCDLK3))

问题 我正在尝试将 Android systrace 工具与我的 Galaxy S3 一起使用,但我遇到了一些问题,似乎是内核问题。 我已经按照这篇文章中描述的步骤进行操作:Failed to use systrace in Jelly Bean 我能够“mount -t debugfs nodev /sys/kernel/debug”,这是“mount”命令的结果: 255|root@android:/ # mount rootfs / rootfs ro,relatime 0 0 tmpfs /dev tmpfs rw,nosuid,relatime,mode=755 0 0 devpts /dev/pts devpts rw,relatime,mode=600 0 0 proc /proc proc rw,relatime 0 0 sysfs /sys sysfs rw,relatime 0 0 none /acct cgroup rw,relatime,cpuacct 0 0 tmpfs /mnt/asec tmpfs rw,relatime,mode=755,gid=1000 0 0 tmpfs /mnt/obb tmpfs rw,relatime,mode=755,gid=1000 0 0 none /dev/cpuctl cgroup rw,relatime,cpu

2022-01-12 20:05:49    分类:技术分享    android   performance   linux-kernel   systrace

Systrace |No /sys/kernel/debug/tracing directory on Android 4.1.1(Galaxy S3 I747UCDLK3)

I'm trying to use Android systrace tool with my galaxy S3 and I meet some problem seems to be the kernel problem. I have follow the steps described in this post: Failed to use systrace in Jelly Bean I'm able to "mount -t debugfs nodev /sys/kernel/debug", and here's the result of "mount" command: 255|root@android:/ # mount rootfs / rootfs ro,relatime 0 0 tmpfs /dev tmpfs rw,nosuid,relatime,mode=755 0 0 devpts /dev/pts devpts rw,relatime,mode=600 0 0 proc /proc proc rw,relatime 0 0 sysfs /sys sysfs rw,relatime 0 0 none /acct cgroup rw,relatime,cpuacct 0 0 tmpfs /mnt/asec tmpfs rw,relatime,mode

2022-01-12 09:29:48    分类:问答    android   performance   linux-kernel   systrace

React-native Android Systrace HTML 在 Ubuntu 14.04 中为空白(React-native Android Systrace HTML is blank in Ubuntu 14.04)

问题 我使用 systrace.py util 从 Android SDK 中收集了我的基于 React-Native 的 Android 应用程序的痕迹到一个 html 文件中。 当我在 Chrome 50.0.2661.86(64 位)或 Firefox 45.0.2 中打开此 html 跟踪文件时,我在开发人员控制台中看到空白屏幕和一些 JavaScript 错误。 操作系统 Ubuntu 14.04 64 位操作系统。 然而,在我的 Windows 机器上,html 跟踪在 Chrome 49.0.2623.112 中正确呈现而没有错误。 谁能帮我解决这个问题? 回答1 作为临时解决方法,您可以使用以下方法: 将 .html 转储文件保存到磁盘在 chrome chrome://tracing打开标签在跟踪控制台中加载文件 回答2 在 Chrome 49 中,有一个关于 Object.observe 被弃用的警告。 https://developers.google.com/web/updates/2016/02/chrome-49-deprecations?hl=en#objectobserve-is-deprecated 在 Chrome 50 中,他们终于将其删除。 https://www.chromestatus.com/features

2021-11-30 07:09:22    分类:技术分享    android   google-chrome   ubuntu   react-native   systrace

是否可以在没有 JNI 的情况下直接从本机代码记录 Android systrace 事件?(Is logging Android systrace events directly from native code possible, without JNI?)

问题 Android systrace 日志系统非常棒,但它只能通过Trace.beginSection()和Trace.endSection()在代码的 Java 部分工作。 在代码的 C/C++ NDK(本机)部分中,它只能通过 JNI 使用,这在没有 Java 环境的线程中很慢或不可用...... 有什么方法可以将事件添加到主 systrace 跟踪缓冲区,甚至从本机 C 代码生成单独的日志? 这个较旧的问题提到 atrace/ftrace 是 Android 的 systrace 使用的内部系统。 这可以(轻松)利用吗? 额外奖励:由于跟踪调用通常位于性能关键部分,因此理想情况下应该可以在实际事件时间之后运行调用。 即我更愿意能够指定记录的时间,而不是轮询它本身的调用。 但这只是锦上添花。 回答1 根据 fadden 的指示,发布带有一些代码的后续答案。 请先阅读他/她的回答以了解概述。 所需要的只是将格式正确的字符串写入/sys/kernel/debug/tracing/trace_marker ,它可以/sys/kernel/debug/tracing/trace_marker地打开。 下面是一些基于 cutils 头文件和 C 文件的非常少的代码。 我更喜欢重新实现它而不是引入任何依赖项,因此如果您非常关心正确性,请检查那里的严格实现,和

2021-11-29 01:50:01    分类:技术分享    android   c   android-ndk   trace   systrace

Is logging Android systrace events directly from native code possible, without JNI?

The Android systrace logging system is fantastic, but it only works in the Java portion of the code, through Trace.beginSection() and Trace.endSection(). In a C/C++ NDK (native) portion of the code it can only be used through JNI, which is slow or unavailable in threads without a Java environment... Is there any way of either adding events to the main systrace trace buffer, or even generating a separate log, from native C code? This older question mentions atrace/ftrace as being the internal system Android's systrace uses. Can this be tapped into (easily)? BONUS TWIST: Since tracing calls

2021-11-23 03:40:40    分类:问答    android   c   android-ndk   trace   systrace

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 errors in Developer console. OS Ubuntu 14.04 64 bit OS. However on my Windows machine a html trace is rendered correctly without errors in Chrome 49.0.2623.112. Can anyone help me sort out this issue?

2021-11-19 05:56:28    分类:问答    android   google-chrome   ubuntu   react-native   systrace