On Mon, 16 Sep 2019, Pengfei Li wrote: > KMALLOC_NORMAL is the most frequently accessed, and kmalloc_caches[] > is initialized by different types of the same size. > > So modifying kmalloc_caches[type][idx] to kmalloc_caches[idx][type] > will benefit performance. > > $ ./scripts/bloat-o-meter vmlinux.patch_1-6 vmlinux.patch_1-7 > add/remove: 0/0 grow/shrink: 2/57 up/down: 8/-457 (-449) > Function old new delta > tg3_self_test 4255 4259 +4 > nf_queue 666 670 +4 > kmalloc_slab 97 93 -4 > i915_sw_fence_await_dma_fence 441 437 -4 > __igmp_group_dropped 619 615 -4 > gss_import_sec_context 176 170 -6 > xhci_alloc_command 212 205 -7 > create_kmalloc_caches 155 148 -7 > xprt_switch_alloc 136 128 -8 > xhci_segment_alloc 297 289 -8 > xhci_ring_alloc 369 361 -8 > xhci_mem_init 3664 3656 -8 > xhci_alloc_virt_device 496 488 -8 > xhci_alloc_tt_info 346 338 -8 > xhci_alloc_stream_info 718 710 -8 > xhci_alloc_container_ctx 215 207 -8 > xfrm_policy_alloc 271 263 -8 > tcp_sendmsg_locked 3120 3112 -8 > tcp_md5_do_add 774 766 -8 > tcp_fastopen_defer_connect 270 262 -8 > sr_read_tochdr.isra 251 243 -8 > sr_read_tocentry.isra 328 320 -8 > sr_is_xa 376 368 -8 > sr_get_mcn 260 252 -8 > selinux_sk_alloc_security 113 105 -8 > sdev_evt_send_simple 118 110 -8 > sdev_evt_alloc 79 71 -8 > scsi_probe_and_add_lun 2938 2930 -8 > sbitmap_queue_init_node 418 410 -8 > ring_buffer_read_prepare 94 86 -8 > request_firmware_nowait 396 388 -8 > regulatory_hint_found_beacon 394 386 -8 > ohci_urb_enqueue 3176 3168 -8 > nla_strdup 142 134 -8 > nfs_alloc_seqid 87 79 -8 > nfs4_get_state_owner 1040 1032 -8 > nfs4_do_close 578 570 -8 > nf_ct_tmpl_alloc 85 77 -8 > mempool_create_node 164 156 -8 > ip_setup_cork 362 354 -8 > ip6_setup_cork 1021 1013 -8 > gss_create_cred 140 132 -8 > drm_flip_work_allocate_task 70 62 -8 > dma_pool_alloc 410 402 -8 > devres_open_group 214 206 -8 > cfg80211_stop_iface 260 252 -8 > cfg80211_sinfo_alloc_tid_stats 77 69 -8 > cfg80211_port_authorized 212 204 -8 > cfg80211_parse_mbssid_data 2397 2389 -8 > cfg80211_ibss_joined 335 327 -8 > call_usermodehelper_setup 149 141 -8 > bpf_prog_alloc_no_stats 182 174 -8 > blk_alloc_flush_queue 191 183 -8 > bdi_alloc_node 195 187 -8 > audit_log_d_path 196 188 -8 > _netlbl_catmap_getnode 247 239 -8 > ____ip_mc_inc_group 475 467 -8 > __i915_sw_fence_await_sw_fence 417 405 -12 > ida_alloc_range 955 934 -21 > Total: Before=14874316, After=14873867, chg -0.00% > > Signed-off-by: Pengfei Li <lpf.vector@xxxxxxxxx> This also seems more intuitive. Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
