google / google/autofdo

Can't Process Perf File

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Description

I have a perf file that autofdo doesn't seem to be able to do anything with. Is autofdo not able to handle "use_lbr"?

```
$ ~/autofdo/build/create_llvm_prof --profile vmlinux.tcp_rr.not-instrumented.perf --binary ../pkgs/boot/vmlinux-4.15.0-smp-922.38.999.999 --out vmlinux.tcp_rr.not-instrumented.profraw
[INFO:/usr/local/google/home/morbo/autofdo/third_party/perf_data_converter/src/quipper/perf_reader.cc:1058] Number of events stored: 61392
[INFO:/usr/local/google/home/morbo/autofdo/third_party/perf_data_converter/src/quipper/perf_parser.cc:274] Parser processed: 1142 MMAP/MMAP2 events, 3148 COMM events, 3219 FORK events, 305 EXIT events, 52726 SAMPLE events, 52473 of these were mapped, 0 SAMPLE events with a data address, 0 of these were mapped
WARNING: Logging before InitGoogleLogging() is written to STDERR
W20220926 22:25:58.449682 2695262 profile.cc:105] use_lbr was enabled but range_count_map was empty!
W20220926 22:25:58.450127 2695262 profile.cc:105] use_lbr was enabled but range_count_map was empty!
W20220926 22:25:58.450407 2695262 profile.cc:105] use_lbr was enabled but range_count_map was empty!
W20220926 22:25:58.459457 2695262 profile.cc:105] use_lbr was enabled but range_count_map was empty!
W20220926 22:25:58.465374 2695262 profile.cc:105] use_lbr was enabled but range_count_map was empty!
W20220926 22:25:58.472229 2695262 profile.cc:105] use_lbr was enabled but range_count_map was empty!
W20220926 22:25:58.474949 2695262 profile.cc:105] use_lbr was enabled but range_count_map was empty!
W20220926 22:25:58.476979 2695262 profile.cc:105] use_lbr was enabled but range_count_map was empty!
W20220926 22:25:58.477377 2695262 profile.cc:105] use_lbr was enabled but range_count_map was empty!
W20220926 22:25:58.484407 2695262 profile.cc:105] use_lbr was enabled but range_count_map was empty!
W20220926 22:25:58.485718 2695262 profile.cc:105] use_lbr was enabled but range_count_map was empty!
W20220926 22:25:58.487694 2695262 profile.cc:105] use_lbr was enabled but range_count_map was empty!
W20220926 22:25:58.489140 2695262 profile.cc:105] use_lbr was enabled but range_count_map was empty!
W20220926 22:25:58.492909 2695262 profile.cc:105] use_lbr was enabled but range_count_map was empty!
...
```

[vmlinux.tcp_rr.not-instrumented.perf.gz](https://github.com/google/autofdo/files/9650038/vmlinux.tcp_rr.not-instrumented.perf.gz)

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