> Just in time for the holidays I have completed an implementation of the JFR > functionality for AIX. As a side note, this is my first submission to OpenJDK > 👋 > > ### Implementation notes and alternatives considered > > After modifying the build system to allow the --enable-jvm-feature-jfr to > work on AIX, my task was to implement the interfaces from os_perf.hpp. The > os_perf_aix.cpp implementation that existed was, I believe, a copy of the > Linux implementation. A review of the code in that file showed that > NetworkInterface, CPUPerformanceInterface, and SystemProcessInterface would > require modification to work on AIX. Using the Linux implementation as a > guide, I initially expected to use files from the aix procfs like > /proc/<pid>/psinfo, and /proc/<pid>/status in a manner similar to the Linux > implementation. However, I ended up using libperfstat for all functionality > required by the interfaces. > > ### Testing > > Testing for JFR seems to be quite light in the repo both before and after > this change. In addition to performing manual testing, I have added some > basic sanity checks that ensure events can be created and committed (using > jtreg), and performs some basic checks on the results of the interface member > functions (using gtest). > > ### More notes > > I've sent an email to the JFR group about a TOC overflow warning I > encountered while building (for the release server target). I believe the fix > is to pass -qpic=large when using the xlc toolchain, but my modifications to > flags-cflags.m4 have not been successful in removing this warning.
Tyler Steele has updated the pull request incrementally with one additional commit since the last revision: Addresses issues from review and other sm fixes - Adds commenting in regards to memory handling by SystemProcess & NetworkInterface classes - Replaces explicit initialization and copy of structs with memcpy and memset as appropriate - Renames internal struct definitions in os_perf_aix - Other minor fixes ------------- Changes: - all: https://git.openjdk.java.net/jdk/pull/6885/files - new: https://git.openjdk.java.net/jdk/pull/6885/files/08837098..3618a77d Webrevs: - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6885&range=16 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6885&range=15-16 Stats: 108 lines in 2 files changed: 19 ins; 56 del; 33 mod Patch: https://git.openjdk.java.net/jdk/pull/6885.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/6885/head:pull/6885 PR: https://git.openjdk.java.net/jdk/pull/6885
