From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- tools/perf/Documentation/perf-daemon.txt | 208 +++++++++++++++++++++++++++++++ 1 file changed, 208 insertions(+) create mode 100644 tools/perf/Documentation/perf-daemon.txt (limited to 'tools/perf/Documentation/perf-daemon.txt') diff --git a/tools/perf/Documentation/perf-daemon.txt b/tools/perf/Documentation/perf-daemon.txt new file mode 100644 index 000000000..f558f8e4b --- /dev/null +++ b/tools/perf/Documentation/perf-daemon.txt @@ -0,0 +1,208 @@ +perf-daemon(1) +============== + + +NAME +---- +perf-daemon - Run record sessions on background + + +SYNOPSIS +-------- +[verse] +'perf daemon' +'perf daemon' [] +'perf daemon start' [] +'perf daemon stop' [] +'perf daemon signal' [] +'perf daemon ping' [] + + +DESCRIPTION +----------- +This command allows to run simple daemon process that starts and +monitors configured record sessions. + +You can imagine 'perf daemon' of background process with several +'perf record' child tasks, like: + + # ps axjf + ... + 1 916507 ... perf daemon start + 916507 916508 ... \_ perf record --control=fifo:control,ack -m 10M -e cycles --overwrite --switch-output -a + 916507 916509 ... \_ perf record --control=fifo:control,ack -m 20M -e sched:* --overwrite --switch-output -a + +Not every 'perf record' session is suitable for running under daemon. +User need perf session that either produces data on query, like the +flight recorder sessions in above example or session that is configured +to produce data periodically, like with --switch-output configuration +for time and size. + +Each session is started with control setup (with perf record --control +options). + +Sessions are configured through config file, see CONFIG FILE section +with EXAMPLES. + + +OPTIONS +------- +-v:: +--verbose:: + Be more verbose. + +--config=:: + Config file path. If not provided, perf will check system and default + locations (/etc/perfconfig, $HOME/.perfconfig). + +--base=:: + Base directory path. Each daemon instance is running on top + of base directory. Only one instance of server can run on + top of one directory at the time. + +All generic options are available also under commands. + + +START COMMAND +------------- +The start command creates the daemon process. + +-f:: +--foreground:: + Do not put the process in background. + + +STOP COMMAND +------------ +The stop command stops all the session and the daemon process. + + +SIGNAL COMMAND +-------------- +The signal command sends signal to configured sessions. + +--session:: + Send signal to specific session. + + +PING COMMAND +------------ +The ping command sends control ping to configured sessions. + +--session:: + Send ping to specific session. + + +CONFIG FILE +----------- +The daemon is configured within standard perf config file by +following new variables: + +daemon.base: + Base path for daemon data. All sessions data are + stored under this path. + +session-.run: + Defines new record session. The value is record's command + line without the 'record' keyword. + +Each perf record session is run in daemon.base/ directory. + + +EXAMPLES +-------- +Example with 2 record sessions: + + # cat ~/.perfconfig + [daemon] + base=/opt/perfdata + + [session-cycles] + run = -m 10M -e cycles --overwrite --switch-output -a + + [session-sched] + run = -m 20M -e sched:* --overwrite --switch-output -a + + +Starting the daemon: + + # perf daemon start + + +Check sessions: + + # perf daemon + [603349:daemon] base: /opt/perfdata + [603350:cycles] perf record -m 10M -e cycles --overwrite --switch-output -a + [603351:sched] perf record -m 20M -e sched:* --overwrite --switch-output -a + +First line is daemon process info with configured daemon base. + + +Check sessions with more info: + + # perf daemon -v + [603349:daemon] base: /opt/perfdata + output: /opt/perfdata/output + lock: /opt/perfdata/lock + up: 1 minutes + [603350:cycles] perf record -m 10M -e cycles --overwrite --switch-output -a + base: /opt/perfdata/session-cycles + output: /opt/perfdata/session-cycles/output + control: /opt/perfdata/session-cycles/control + ack: /opt/perfdata/session-cycles/ack + up: 1 minutes + [603351:sched] perf record -m 20M -e sched:* --overwrite --switch-output -a + base: /opt/perfdata/session-sched + output: /opt/perfdata/session-sched/output + control: /opt/perfdata/session-sched/control + ack: /opt/perfdata/session-sched/ack + up: 1 minutes + +The 'base' path is daemon/session base. +The 'lock' file is daemon's lock file guarding that no other +daemon is running on top of the base. +The 'output' file is perf record output for specific session. +The 'control' and 'ack' files are perf control files. +The 'up' number shows minutes daemon/session is running. + + +Make sure control session is online: + + # perf daemon ping + OK cycles + OK sched + + +Send USR2 signal to session 'cycles' to generate perf.data file: + + # perf daemon signal --session cycles + signal 12 sent to session 'cycles [603452]' + + # tail -2 /opt/perfdata/session-cycles/output + [ perf record: dump data: Woken up 1 times ] + [ perf record: Dump perf.data.2020123017013149 ] + + +Send USR2 signal to all sessions: + + # perf daemon signal + signal 12 sent to session 'cycles [603452]' + signal 12 sent to session 'sched [603453]' + + # tail -2 /opt/perfdata/session-cycles/output + [ perf record: dump data: Woken up 1 times ] + [ perf record: Dump perf.data.2020123017024689 ] + # tail -2 /opt/perfdata/session-sched/output + [ perf record: dump data: Woken up 1 times ] + [ perf record: Dump perf.data.2020123017024713 ] + + +Stop daemon: + + # perf daemon stop + + +SEE ALSO +-------- +linkperf:perf-record[1], linkperf:perf-config[1] -- cgit v1.2.3