Test log:
bins/dbg/bm_chttp2_transport --benchmark_filter=BM_TransportStreamSend/134217728$ GRPC_POLL_STRATEGY=poll

D0805 16:26:48.958285370 25878 ev_posix.cc:174] Using polling engine: poll
D0805 16:26:48.958459186 25878 dns_resolver_ares.cc:485] Using ares dns resolver
2019-08-05 16:26:48
Running bins/dbg/bm_chttp2_transport
Run on (32 X 2300 MHz CPU s)
CPU Caches:
L1 Data 32K (x16)
L1 Instruction 32K (x16)
L2 Unified 256K (x16)
L3 Unified 46080K (x1)
WARNING Library was built as DEBUG. Timings may be affected.
Command terminated by signal 11
real 0.93
user 0.17
sys 0.29