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| author | Yafang Shao <laoar.shao@gmail.com> | 2023-03-05 15:46:01 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2023-03-07 20:33:42 +0300 |
| commit | 1746d0555a8795c7ecfeab6a2c3e3c824cf57535 (patch) | |
| tree | ff17fd77e726c5ee6be2eff9895c0c3e104a3963 /kernel/bpf/stackmap.c | |
| parent | 304849a27b341cf22d5c15096144cc8c1b69e0c0 (diff) | |
| download | linux-1746d0555a8795c7ecfeab6a2c3e3c824cf57535.tar.xz | |
bpf: arraymap memory usage
Introduce array_map_mem_usage() to calculate arraymap memory usage. In
this helper, some small memory allocations are ignored, like the
allocation of struct bpf_array_aux in prog_array. The inner_map_meta in
array_of_map is also ignored.
The result as follows,
- before
11: array name count_map flags 0x0
key 4B value 4B max_entries 65536 memlock 524288B
12: percpu_array name count_map flags 0x0
key 4B value 4B max_entries 65536 memlock 8912896B
13: perf_event_array name count_map flags 0x0
key 4B value 4B max_entries 65536 memlock 524288B
14: prog_array name count_map flags 0x0
key 4B value 4B max_entries 65536 memlock 524288B
15: cgroup_array name count_map flags 0x0
key 4B value 4B max_entries 65536 memlock 524288B
- after
11: array name count_map flags 0x0
key 4B value 4B max_entries 65536 memlock 524608B
12: percpu_array name count_map flags 0x0
key 4B value 4B max_entries 65536 memlock 17301824B
13: perf_event_array name count_map flags 0x0
key 4B value 4B max_entries 65536 memlock 524608B
14: prog_array name count_map flags 0x0
key 4B value 4B max_entries 65536 memlock 524608B
15: cgroup_array name count_map flags 0x0
key 4B value 4B max_entries 65536 memlock 524608B
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Link: https://lore.kernel.org/r/20230305124615.12358-5-laoar.shao@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'kernel/bpf/stackmap.c')
0 files changed, 0 insertions, 0 deletions