Create_gcov always dump 1600 bytes

I am trying to covert captured perf data to gcc format.But always 1600 bytes are dumped.

Machine where I captured perf data is having LBR support.
perf record -o /tmp//perf.data -b -e cpu/event=0xc4,umask=0x20,name=br_inst_retired_near_taken,period=400009/pp -p 11045 -F 10 -- sleep 900

Then I used following command to create gcov data
create_gcov --binary=<> --profile=perf.data --gcov=perf-prod.afdo --profiler=perf -log_dir=. -gcov_version=1

Binary is unstripped and have debug symbols

In log following
Log file created at: 2019/05/10 12:04:54
Running on machine: a107-2-2-3
Log line format: [IWEF]mmdd hh:mm:ss.uuuuuu threadid file:line] msg
W0510 12:04:54.359030 5412 module_grouper.cc:60] Cannot read compilation info from binary. Please use -frecord-compilation-info-in-elf when building the binary
I0510 12:04:55.822785 5412 perf_reader.cc:798] Number of events stored: 1164694
I0510 12:05:03.224366 5412 perf_parser.cc:256] Parser processed: 1066560 MMAP/MMAP2 events, 405 COMM events, 0 FORK events, 0 EXIT events, 90695 SAMPLE events, 73020 of these were mapped

There is no other information.I tried many combinations but it is not working.What could be the issue?