How to compile perf for Android
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I. Set the Android NDK environment
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(a). Use the Android NDK
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1. You need to download and install the Android Native Development Kit (NDK).
Set the NDK variable to point to the path where you installed the NDK:
export NDK=/path/to/android-ndk
2. Set cross-compiling environment variables for NDK toolchain and sysroot.
For arm:
export NDK_TOOLCHAIN=${NDK}/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-
export NDK_SYSROOT=${NDK}/platforms/android-24/arch-arm
For x86:
export NDK_TOOLCHAIN=${NDK}/toolchains/x86-4.9/prebuilt/linux-x86_64/bin/i686-linux-android-
export NDK_SYSROOT=${NDK}/platforms/android-24/arch-x86
This method is only tested for Android NDK versions Revision 11b and later.
perf uses some bionic enhancements that are not included in prior NDK versions.
You can use method (b) described below instead.
(b). Use the Android source tree
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1. Download the master branch of the Android source tree.
Set the environment for the target you want using:
source build/envsetup.sh
lunch
2. Build your own NDK sysroot to contain latest bionic changes and set the
NDK sysroot environment variable.
cd ${ANDROID_BUILD_TOP}/ndk
For arm:
./build/tools/build-ndk-sysroot.sh --abi=arm
export NDK_SYSROOT=${ANDROID_BUILD_TOP}/ndk/build/platforms/android-3/arch-arm
For x86:
./build/tools/build-ndk-sysroot.sh --abi=x86
export NDK_SYSROOT=${ANDROID_BUILD_TOP}/ndk/build/platforms/android-3/arch-x86
3. Set the NDK toolchain environment variable.
For arm:
export NDK_TOOLCHAIN=${ANDROID_TOOLCHAIN}/arm-linux-androideabi-
For x86:
export NDK_TOOLCHAIN=${ANDROID_TOOLCHAIN}/i686-linux-android-
II. Compile perf for Android
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You need to run make with the NDK toolchain and sysroot defined above:
For arm:
make WERROR=0 ARCH=arm CROSS_COMPILE=${NDK_TOOLCHAIN} EXTRA_CFLAGS="-pie --sysroot=${NDK_SYSROOT}"
For x86:
make WERROR=0 ARCH=x86 CROSS_COMPILE=${NDK_TOOLCHAIN} EXTRA_CFLAGS="-pie --sysroot=${NDK_SYSROOT}"
III. Install perf
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You need to connect to your Android device/emulator using adb.
Install perf using:
adb push perf /data/perf
If you also want to use perf-archive you need busybox tools for Android.
For installing perf-archive, you first need to replace #!/bin/bash with #!/system/bin/sh:
sed 's/#!\/bin\/bash/#!\/system\/bin\/sh/g' perf-archive >> /tmp/perf-archive
chmod +x /tmp/perf-archive
adb push /tmp/perf-archive /data/perf-archive
IV. Environment settings for running perf
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Some perf features need environment variables to run properly.
You need to set these before running perf on the target:
adb shell
# PERF_PAGER=cat
IV. Run perf
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Run perf on your device/emulator to which you previously connected using adb:
# ./data/perf
id' value='2b89ed65a6f201a6a4f0450ad289aa4bf491608c'/>
ipv6: Paritially checksum full MTU frames
IPv6 will mark data that is smaller that mtu - headersize as
CHECKSUM_PARTIAL, but if the data will completely fill the mtu,
the packet checksum will be computed in software instead.
Extend the conditional to include the data that fills the mtu
as well.
Signed-off-by: Vladislav Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>