[PATCH bpf-next v7 0/2] Add benchmark for bpf memory allocator

[Hou Tao <houtao@xxxxxxxxxxxxxxx>]

From: Hou Tao <houtao1@xxxxxxxxxx>

Hi,

Beside adding a simple prepare patch, v7 mainly addresses suggestions
from Alexei. As ususal, comments and suggestions are always welcome.

Change Log:
v7:
 * Rename name of producer threads to avoid confusion
 * Make the comments in producer threads more clear
 * Remove unnecessary check of ctx->from in bpf program
 * Split add_del_on_diff bpf program to two bpf program for clarity

v6: https://lore.kernel.org/bpf/20230613080921.1623219-1-houtao@xxxxxxxxxxxxxxx/
  * add fix patches for benchmark framework
  * updates for htab-mem benchmark (Most of updates are suggested by Alexei)
    * remove --full and --max-entries and use a fixed 8k size for htab
    * remove op_factor and increase op_cnt correctly
    * use -a instead of --prod-affinity in run_bench_htab_mem.sh
    * use $RUN_BENCH in run_bench_htab_mem.sh
    * call cleanup_cgroup_environment() at the end of htab_mem_report_final()

v5: https://lore.kernel.org/bpf/ff4b2396-48aa-28f1-c91b-7c8a4b9510bb@xxxxxxxxxxxxxxx/
 * send the benchmark patch alone (suggested by Alexei)
 * limit the max number of touched elements per-bpf-program call to 64 (from Alexei)
 * show per-producer performance (from Alexei)
 * handle the return value of read() (from BPF CI)
 * do cleanup_cgroup_environment() in htab_mem_report_final()

v4: https://lore.kernel.org/bpf/20230606035310.4026145-1-houtao@xxxxxxxxxxxxxxx/

Hou Tao (2):
  selftests/bpf: Add min() and max() macros in bpf_util.h
  selftests/bpf: Add benchmark for bpf memory allocator

 tools/testing/selftests/bpf/Makefile          |   3 +
 tools/testing/selftests/bpf/bench.c           |   4 +
 .../selftests/bpf/benchs/bench_htab_mem.c     | 345 ++++++++++++++++++
 .../bpf/benchs/run_bench_htab_mem.sh          |  40 ++
 tools/testing/selftests/bpf/bpf_util.h        |   7 +
 .../selftests/bpf/progs/htab_mem_bench.c      | 105 ++++++
 6 files changed, 504 insertions(+)
 create mode 100644 tools/testing/selftests/bpf/benchs/bench_htab_mem.c
 create mode 100755 tools/testing/selftests/bpf/benchs/run_bench_htab_mem.sh
 create mode 100644 tools/testing/selftests/bpf/progs/htab_mem_bench.c

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2.29.2