iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
linux/kernel/bpf
History
Alexei Starovoitov 0fd7c5d433 bpf: Optimize call_rcu in non-preallocated hash map. 
Doing call_rcu() million times a second becomes a bottle neck.
Convert non-preallocated hash map from call_rcu to SLAB_TYPESAFE_BY_RCU.
The rcu critical section is no longer observed for one htab element
which makes non-preallocated hash map behave just like preallocated hash map.
The map elements are released back to kernel memory after observing
rcu critical section.
This improves 'map_perf_test 4' performance from 100k events per second
to 250k events per second.

bpf_mem_alloc + percpu_counter + typesafe_by_rcu provide 10x performance
boost to non-preallocated hash map and make it within few % of preallocated map
while consuming fraction of memory.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220902211058.60789-8-alexei.starovoitov@gmail.com
2022-09-05 15:33:06 +02:00
..
preload
bpf: iterators: Build and use lightweight bootstrap version of bpftool
2022-07-15 12:01:30 -07:00
arraymap.c
bpf: Acquire map uref in .init_seq_private for array map iterator
2022-08-10 10:12:47 -07:00
bloom_filter.c
bpf: Compute map_btf_id during build time
2022-04-26 11:35:21 -07:00
bpf_inode_storage.c
bpf: Compute map_btf_id during build time
2022-04-26 11:35:21 -07:00
bpf_iter.c
bpf: Initialize the bpf_run_ctx in bpf_iter_run_prog()
2022-08-18 17:06:13 -07:00
bpf_local_storage.c
bpf: Use this_cpu_{inc|dec|inc_return} for bpf_task_storage_busy
2022-09-01 12:16:12 -07:00
bpf_lru_list.c
bpf_lru_list: Read double-checked variable once without lock
2021-02-10 15:54:26 -08:00
bpf_lru_list.h
printk: stop including cache.h from printk.h
2022-05-13 07:20:07 -07:00
bpf_lsm.c
bpf: Only add BTF IDs for socket security hooks when CONFIG_SECURITY_NETWORK is on
2022-09-01 16:21:14 -07:00
bpf_struct_ops_types.h
bpf: Add dummy BPF STRUCT_OPS for test purpose
2021-11-01 14:10:00 -07:00
bpf_struct_ops.c
bpf: Remove is_valid_bpf_tramp_flags()
2022-07-11 21:04:58 +02:00
bpf_task_storage.c
bpf: Use this_cpu_{inc|dec|inc_return} for bpf_task_storage_busy
2022-09-01 12:16:12 -07:00
btf.c
bpf: Always return corresponding btf_type in __get_type_size()
2022-08-09 10:30:45 -07:00
cgroup_iter.c
bpf: Remove useless else if
2022-09-01 14:04:07 -07:00
cgroup.c
bpf: expose bpf_strtol and bpf_strtoul to all program types
2022-08-23 16:08:21 -07:00
core.c
bpf: Add BPF-helper for accessing CLOCK_TAI
2022-08-09 09:47:13 -07:00
cpumap.c
bpf: Use bpf_map_area_alloc consistently on bpf map creation
2022-08-10 11:50:43 -07:00
devmap.c
bpf: Use bpf_map_area_alloc consistently on bpf map creation
2022-08-10 11:50:43 -07:00
disasm.c
bpf: Relicense disassembler as GPL-2.0-only OR BSD-2-Clause
2021-09-02 14:49:23 +02:00
disasm.h
bpf: Relicense disassembler as GPL-2.0-only OR BSD-2-Clause
2021-09-02 14:49:23 +02:00
dispatcher.c
bpf: Remove bpf_image tree
2020-03-13 12:49:52 -07:00
hashtab.c
bpf: Optimize call_rcu in non-preallocated hash map.
2022-09-05 15:33:06 +02:00
helpers.c
bpf: Move bpf_loop and bpf_for_each_map_elem under CAP_BPF
2022-08-23 16:21:59 -07:00
inode.c
bpf: Convert bpf_preload.ko to use light skeleton.
2022-02-10 23:31:51 +01:00
Kconfig
rcu: Make the TASKS_RCU Kconfig option be selected
2022-04-20 16:52:58 -07:00
link_iter.c
bpf: Add bpf_link iterator
2022-05-10 11:20:45 -07:00
local_storage.c
bpf: Use bpf_map_area_alloc consistently on bpf map creation
2022-08-10 11:50:43 -07:00
lpm_trie.c
bpf: Use bpf_map_area_alloc consistently on bpf map creation
2022-08-10 11:50:43 -07:00
Makefile
bpf: Introduce any context BPF specific memory allocator.
2022-09-05 15:33:05 +02:00
map_in_map.c
bpf: Allow storing unreferenced kptr in map
2022-04-25 17:31:35 -07:00
map_in_map.h
bpf: Add map_meta_equal map ops
2020-08-28 15:41:30 +02:00
map_iter.c
bpf: Introduce MEM_RDONLY flag
2021-12-18 13:27:41 -08:00
memalloc.c
bpf: Optimize call_rcu in non-preallocated hash map.
2022-09-05 15:33:06 +02:00
mmap_unlock_work.h
bpf: Introduce helper bpf_find_vma
2021-11-07 11:54:51 -08:00
net_namespace.c
net: Add includes masked by netdevice.h including uapi/bpf.h
2021-12-29 20:03:05 -08:00
offload.c
bpf: Use bpf_map_area_alloc consistently on bpf map creation
2022-08-10 11:50:43 -07:00
percpu_freelist.c
bpf: avoid grabbing spin_locks of all cpus when no free elems
2022-06-11 14:25:35 -07:00
percpu_freelist.h
bpf: Use raw_spin_trylock() for pcpu_freelist_push/pop in NMI
2020-10-06 00:04:11 +02:00
prog_iter.c
bpf: Refactor bpf_iter_reg to have separate seq_info member
2020-07-25 20:16:32 -07:00
queue_stack_maps.c
bpf: Remove unneeded memset in queue_stack_map creation
2022-08-10 11:48:22 -07:00
reuseport_array.c
net: refactor bpf_sk_reuseport_detach()
2022-08-10 21:48:04 -07:00
ringbuf.c
bpf: Use bpf_map_area_alloc consistently on bpf map creation
2022-08-10 11:50:43 -07:00
stackmap.c
bpf: Compute map_btf_id during build time
2022-04-26 11:35:21 -07:00
syscall.c
bpf: prepare for more bpf syscall to be used from kernel and user space.
2022-08-25 18:52:05 -07:00
sysfs_btf.c
bpf: Load and verify kernel module BTFs
2020-11-10 15:25:53 -08:00
task_iter.c
bpf: Remove redundant assignment to meta.seq in __task_seq_show()
2022-04-11 21:14:34 +02:00
tnum.c
bpf, tnums: Provably sound, faster, and more precise algorithm for tnum_mul
2021-06-01 13:34:15 +02:00
trampoline.c
bpf: Use this_cpu_{inc_return|dec} for prog->active
2022-09-01 12:16:18 -07:00
verifier.c
bpf: Relax the requirement to use preallocated hash maps in tracing progs.
2022-09-05 15:33:05 +02:00