16c00db4bb
Pull AFS fixes from David Howells:
"Here's a set of patches that fix a number of bugs in the in-kernel AFS
client, including:
- Fix directory locking to not use individual page locks for
directory reading/scanning but rather to use a semaphore on the
afs_vnode struct as the directory contents must be read in a single
blob and data from different reads must not be mixed as the entire
contents may be shuffled about between reads.
- Fix address list parsing to handle port specifiers correctly.
- Only give up callback records on a server if we actually talked to
that server (we might not be able to access a server).
- Fix some callback handling bugs, including refcounting,
whole-volume callbacks and when callbacks actually get broken in
response to a CB.CallBack op.
- Fix some server/address rotation bugs, including giving up if we
can't probe a server; giving up if a server says it doesn't have a
volume, but there are more servers to try.
- Fix the decoding of fetched statuses to be OpenAFS compatible.
- Fix the handling of server lookups in Cache Manager ops (such as
CB.InitCallBackState3) to use a UUID if possible and to handle no
server being found.
- Fix a bug in server lookup where not all addresses are compared.
- Fix the non-encryption of calls that prevents some servers from
being accessed (this also requires an AF_RXRPC patch that has
already gone in through the net tree).
There's also a patch that adds tracepoints to log Cache Manager ops
that don't find a matching server, either by UUID or by address"
* tag 'afs-fixes-20180514' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
afs: Fix the non-encryption of calls
afs: Fix CB.CallBack handling
afs: Fix whole-volume callback handling
afs: Fix afs_find_server search loop
afs: Fix the handling of an unfound server in CM operations
afs: Add a tracepoint to record callbacks from unlisted servers
afs: Fix the handling of CB.InitCallBackState3 to find the server by UUID
afs: Fix VNOVOL handling in address rotation
afs: Fix AFSFetchStatus decoder to provide OpenAFS compatibility
afs: Fix server rotation's handling of fileserver probe failure
afs: Fix refcounting in callback registration
afs: Fix giving up callbacks on server destruction
afs: Fix address list parsing
afs: Fix directory page locking
78 lines
3.1 KiB
Text
78 lines
3.1 KiB
Text
How to compile perf for Android
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=========================================
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I. Set the Android NDK environment
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------------------------------------------------
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(a). Use the Android NDK
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------------------------------------------------
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1. You need to download and install the Android Native Development Kit (NDK).
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Set the NDK variable to point to the path where you installed the NDK:
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export NDK=/path/to/android-ndk
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2. Set cross-compiling environment variables for NDK toolchain and sysroot.
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For arm:
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export NDK_TOOLCHAIN=${NDK}/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-
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export NDK_SYSROOT=${NDK}/platforms/android-24/arch-arm
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For x86:
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export NDK_TOOLCHAIN=${NDK}/toolchains/x86-4.9/prebuilt/linux-x86_64/bin/i686-linux-android-
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export NDK_SYSROOT=${NDK}/platforms/android-24/arch-x86
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This method is only tested for Android NDK versions Revision 11b and later.
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perf uses some bionic enhancements that are not included in prior NDK versions.
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You can use method (b) described below instead.
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(b). Use the Android source tree
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-----------------------------------------------
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1. Download the master branch of the Android source tree.
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Set the environment for the target you want using:
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source build/envsetup.sh
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lunch
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2. Build your own NDK sysroot to contain latest bionic changes and set the
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NDK sysroot environment variable.
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cd ${ANDROID_BUILD_TOP}/ndk
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For arm:
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./build/tools/build-ndk-sysroot.sh --abi=arm
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export NDK_SYSROOT=${ANDROID_BUILD_TOP}/ndk/build/platforms/android-3/arch-arm
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For x86:
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./build/tools/build-ndk-sysroot.sh --abi=x86
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export NDK_SYSROOT=${ANDROID_BUILD_TOP}/ndk/build/platforms/android-3/arch-x86
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3. Set the NDK toolchain environment variable.
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For arm:
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export NDK_TOOLCHAIN=${ANDROID_TOOLCHAIN}/arm-linux-androideabi-
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For x86:
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export NDK_TOOLCHAIN=${ANDROID_TOOLCHAIN}/i686-linux-android-
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II. Compile perf for Android
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------------------------------------------------
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You need to run make with the NDK toolchain and sysroot defined above:
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For arm:
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make WERROR=0 ARCH=arm CROSS_COMPILE=${NDK_TOOLCHAIN} EXTRA_CFLAGS="-pie --sysroot=${NDK_SYSROOT}"
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For x86:
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make WERROR=0 ARCH=x86 CROSS_COMPILE=${NDK_TOOLCHAIN} EXTRA_CFLAGS="-pie --sysroot=${NDK_SYSROOT}"
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III. Install perf
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-----------------------------------------------
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You need to connect to your Android device/emulator using adb.
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Install perf using:
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adb push perf /data/perf
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If you also want to use perf-archive you need busybox tools for Android.
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For installing perf-archive, you first need to replace #!/bin/bash with #!/system/bin/sh:
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sed 's/#!\/bin\/bash/#!\/system\/bin\/sh/g' perf-archive >> /tmp/perf-archive
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chmod +x /tmp/perf-archive
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adb push /tmp/perf-archive /data/perf-archive
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IV. Environment settings for running perf
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------------------------------------------------
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Some perf features need environment variables to run properly.
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You need to set these before running perf on the target:
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adb shell
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# PERF_PAGER=cat
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IV. Run perf
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------------------------------------------------
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Run perf on your device/emulator to which you previously connected using adb:
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# ./data/perf
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