I haven't tried any previous Ubuntu or kernel releases. I'm not doing anything special to compile perf myself, i.e., I just run make in tools/perf. Looking at tools/perf/Makefile.config, it seems like auxtrace gets disabled if GCC is detected to not have __get_cpuid, which makes it seems like a bug in the feature detection or an abnormality in the environment where perf is built for linux-tools-common.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1641859 Title: perf compiled without auxtrace Status in linux package in Ubuntu: Triaged Bug description: perf in linux-tools-common_4.8.0-27.29 seems to be compiled without auxtrace support. This prevents perf from using Intel Processor Trace (PT) or Branch Trace Store (BTS). Unfortunately, rather than indicating that auxtrace is missing, perf just records no samples: # grep -c intel_pt /proc/cpuinfo 8 # perf list | grep intel_pt # grep intel_pt /proc/cpuinfo # perf record -e intel_pt// -- ls ... # perf script I am able to successfully to use PT on my machine if I compile perf myself. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641859/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
