Public bug reported:
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.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Description changed:
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
+ # grep -c intel_pt /proc/cpuinfo
8
# grep intel_pt /proc/cpuinfo
# perf record -e intel_pt// -- ls
...
# perf script
#
- I am able to successfully to using PT on my machine if I compile perf
+ I am able to successfully to use PT on my machine if I compile perf
myself.
** Description changed:
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.
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https://bugs.launchpad.net/bugs/1641859
Title:
perf compiled without auxtrace
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