commit | a2b7660b927e7d0ac63728ac3d4db446face7307 | [log] [tgz] |
---|---|---|
author | vlankhaar <vlankhaar@google.com> | Fri Oct 13 13:44:56 2017 -0700 |
committer | lannadorai <lannadorai@gmail.com> | Mon Oct 16 13:36:55 2017 -0700 |
tree | 9dffc5fbc048460b4ed0ed436f7cd1eb0e664ef2 | |
parent | 5fd34268b55307c8c6e0a707bea0466f5b12a46d [diff] |
Trigger kernel heuristic for execmode=KERNEL not KERNEL+GUEST_USER+HYPERVISOR. A given sample includes a misc field indicating whether the sample happened while executing kernel mode, user mode, guest kernel, or guest user (among other things). A heuristic to point the "main" mmap at the kernel triggered whenever the misc field's lowest bit was set, rather than when it was KERNEL. GUEST_USER == 0b101 and HYPERVISOR=0b011 both have the bit set, but aren't appropriate for the heuristic. PiperOrigin-RevId: 172140214
The perf_to_profile
binary can be used to turn a perf.data file, which is generated by the linux profiler, perf, into a profile.proto file which can be visualized using the tool pprof.
For details on pprof, see https://github.com/google/pprof
THIS IS NOT AN OFFICIAL GOOGLE PRODUCT
To install all dependences and build the binary, run the following commands. These were tested on Debian GNU/Linux 8 (jessie):
sudo apt-get -y install autoconf automake g++ git libelf-dev libssl-dev libtool make pkg-config git clone --recursive https://github.com/google/perf_data_converter.git cd perf_data_converter make perf_to_profile
If you already have protocol buffers and googletest installed on your system, you can compile using your local packages with the following commands:
sudo apt-get -y install autoconf automake g++ git libelf-dev libssl-dev libtool make pkg-config git clone https://github.com/google/perf_data_converter.git cd perf_data_converter make perf_to_profile
Place the perf_to_profile binary in a place accessible from your path (eg /usr/local/bin).
There are a small number of tests that verify the basic functionality. To run these, after successful compilation, run:
make check
Profile a command using perf, for example:
perf record /bin/ls
The example command will generate a profile named perf.data, you should convert this into a profile.proto then visualize it using pprof:
perf_to_profile perf.data profile.pb pprof -web profile.pb
Recent versions of pprof will automatically invoke perf_to_profile
:
pprof -web perf.data