On 12/21/2023 10:14 PM, Hou Tao wrote: > From: Hou Tao <houtao1@xxxxxxxxxx> > > Hi, > > The patch set aims to add a benchmark for bpf memory allocator to test > both its alloc/free ratio and the memory usage. > > Patch #1 is a preparatory patch which moves bench specific metrics into > union of structs, so newly-added benchmark can add metrics which doesn't > fit with the existing one easily. Patch #2 is the benchmark patch. It > tests the performance through the following steps: > 1) find the inner array by using the cpu number as key > 2) allocate at most 64 128-bytes-sized objects through bpf_obj_new() > 3) stash these objectes into the inner array through bpf_kptr_xchg() > 4) account the time used in step 1)~3) > 5) calculate the performance in M/s: alloc_cnt * 1000 / alloc_tim_ns > 6) calculate the memory usage by reading slub field in memory.stat file > and get the final value after subtracting the base value. > > Please see individual patches for more details. And comments are always > welcome. Ping? It seems the patch set has been removed from PR queue of kernel-patches/bpf, but I want to get some feedback before posting a v2 (need to update the benchmark result due to the merge of "bpf: Reduce memory usage for bpf_global_percpu_ma" patch set). > > Hou Tao (2): > selftests/bpf: Move bench specific metrics into union of structs > selftests/bpf: Add benchmark for bpf memory allocator > > tools/testing/selftests/bpf/Makefile | 2 + > tools/testing/selftests/bpf/bench.c | 13 +- > tools/testing/selftests/bpf/bench.h | 22 +- > .../selftests/bpf/benchs/bench_bpf_ma.c | 273 ++++++++++++++++++ > .../selftests/bpf/benchs/bench_htab_mem.c | 10 +- > .../bench_local_storage_rcu_tasks_trace.c | 10 +- > .../selftests/bpf/progs/bench_bpf_ma.c | 222 ++++++++++++++ > 7 files changed, 535 insertions(+), 17 deletions(-) > create mode 100644 tools/testing/selftests/bpf/benchs/bench_bpf_ma.c > create mode 100644 tools/testing/selftests/bpf/progs/bench_bpf_ma.c >
