├── .github └── workflows │ └── ci.yml ├── .gitignore ├── Cargo.lock ├── Cargo.toml ├── LICENSE ├── README.md ├── src └── main.rs └── tests ├── proc-net-softnet_stat-2_6_32 ├── proc-net-softnet_stat-2_6_36 ├── proc-net-softnet_stat-3_11 ├── proc-net-softnet_stat-5_10_47 └── proc-net-softnet_stat-6_4_7 /.github/workflows/ci.yml: -------------------------------------------------------------------------------- 1 | name: Cargo Build & Test 2 | 3 | on: 4 | push: 5 | pull_request: 6 | 7 | env: 8 | CARGO_TERM_COLOR: always 9 | 10 | jobs: 11 | build_and_test: 12 | runs-on: ubuntu-latest 13 | 14 | steps: 15 | - uses: actions/checkout@v3 16 | - name: Build 17 | run: cargo build --verbose 18 | - name: Test 19 | run: cargo test --verbose 20 | 21 | 22 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | target 2 | -------------------------------------------------------------------------------- /Cargo.lock: -------------------------------------------------------------------------------- 1 | # 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Radtke III "] 7 | description = "Parse the `/proc/net/softnet_stat` file into something more readable." 8 | documentation = "https://github.com/hjr3/softnet-stat" 9 | homepage = "https://github.com/hjr3/softnet-stat" 10 | repository = "https://github.com/hjr3/softnet-stat" 11 | readme = "README.md" 12 | keywords = ["network", "monitor", "softnet"] 13 | license = "GPL-3.0" 14 | 15 | [dependencies] 16 | nom = "^7.1.0" 17 | getopts = "^0.2.14" 18 | serde = "^1.0.0" 19 | serde_derive = "^1.0.0" 20 | serde_json = "^1.0.0" 21 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # softnet-stat 2 | 3 | ![Build Status](https://github.com/hjr3/softnet-stat/actions/workflows/ci.yml/badge.svg) 4 | 5 | Parse the `/proc/net/softnet_stat` file into something more readable. For more information about `/proc/net/softnet_stat`, I suggest reading [Monitoring and Tuning the Linux Networking Stack: Receiving Data](http://blog.packagecloud.io/eng/2016/06/22/monitoring-tuning-linux-networking-stack-receiving-data/#help-with-linux-networking-or-other-systems). 6 | 7 | ## Compatible Systems 8 | 9 | This parser should work on all Linux kernels since `v2.6.32`. In later versions of the kernel, more fields were added. Currently, the parser will default these fields to a value of `0` if they are not found in the file. 10 | 11 | ## Distribution 12 | 13 | The `softnet-stat` binary is distributed via the [hjr3/softnet-stat](https://packagecloud.io/hjr3/softnet-stat) repository on packagecloud.io 14 | 15 | ## Build 16 | 17 | This software was built Rust using `v1.56.0`. All dependencies are listed in `Cargo.toml`. To build: `$ cargo build`. 18 | 19 | The `v1.x.x` releases were built using Rust `v1.10.0`. 20 | 21 | ### Static Binary 22 | 23 | To build a completely static binary for production use, the binary can use musl as a target. 24 | 25 | For Linux: 26 | 27 | ```shell 28 | $ cargo build --target=x86_64-unknown-linux-musl 29 | ``` 30 | 31 | For macOS: 32 | 33 | ```shell 34 | docker run --rm -it -v "$(pwd)":/home/rust/src ekidd/rust-musl-builder cargo build --release 35 | ``` 36 | 37 | ## Release 38 | 39 | To create a new rpm, do the following: 40 | 41 | ``` 42 | $ mkdir target/x86_64-unknown-linux-musl/release/$VERSION 43 | $ docker run --rm -v $(pwd):/data skandyla/fpm -s dir -t rpm -n "softnet_stat" -v $VERSION -p /data -C /data/target/x86_64-unknown-linux-musl/release ./ 44 | ``` 45 | 46 | This will put something like `softnet_stat-1.2.0-1.x86_64.rpm` in the current directory. 47 | 48 | ## Tests 49 | 50 | This program has been tested against `/proc/net/softnet_stat` files from these Linux versions: 51 | 52 | * `v2.6.32` 53 | * `v2.6.36` 54 | * `v3.11.x` 55 | * `v5.10.47` 56 | * `v6.4.x` 57 | 58 | To exercise these tests: `$ cargo test`. 59 | 60 | ## Examples 61 | 62 | ### Formatted 63 | 64 | ```shell 65 | ./softnet-stat 66 | 67 | Cpu Processed Dropped Time Squeezed Cpu Collision Received RPS Flow Limit Count 68 | 0 1842008611 0 1 0 0 0 69 | 1 1863193957 0 2 0 0 0 70 | 2 1711764716 0 3 0 0 0 71 | 3 1640600369 0 0 0 0 0 72 | 4 1737798067 0 5 0 0 0 73 | 5 1686686610 0 1 0 0 0 74 | ``` 75 | 76 | ### Json 77 | 78 | ```shell 79 | ./softnet-stat --json 80 | [{"processed":1842008611,"dropped":0,"time_squeeze":1,"cpu_collision":0,"received_rps":null,"flow_limit_count":null},{"processed":1863193957,"dropped":0,"time_squeeze":2,"cpu_collision":0,"received_rps":null,"flow_limit_count":null},{"processed":1711764716,"dropped":0,"time_squeeze":3,"cpu_collision":0,"received_rps":null,"flow_limit_count":null},{"processed":1640600369,"dropped":0,"time_squeeze":0,"cpu_collision":0,"received_rps":null,"flow_limit_count":null},{"processed":1737798067,"dropped":0,"time_squeeze":5,"cpu_collision":0,"received_rps":null,"flow_limit_count":null},{"processed":1686686610,"dropped":0,"time_squeeze":1,"cpu_collision":0,"received_rps":null,"flow_limit_count":null}] 81 | ``` 82 | 83 | ### Read From Stdin 84 | 85 | ``` 86 | $ cat /path/to/file | ./target/debug/softnet-stat -s 87 | Cpu Processed Dropped Time Squeezed Cpu Collision Received RPS Flow Limit Count 88 | 0 1842008611 0 1 0 0 0 89 | 1 1863193957 0 2 0 0 0 90 | 2 1711764716 0 3 0 0 0 91 | 3 1640600369 0 0 0 0 0 92 | 4 1737798067 0 5 0 0 0 93 | 5 1686686610 0 1 0 0 0 94 | ``` 95 | -------------------------------------------------------------------------------- /src/main.rs: -------------------------------------------------------------------------------- 1 | /* Parser for /proc/softnet_stats file 2 | * Copyright (C) 2016 Herman J. Radtke III 3 | * 4 | * This program is free software: you can redistribute it and/or modify 5 | * it under the terms of the GNU General Public License as published by 6 | * the Free Software Foundation, either version 3 of the License, or 7 | * (at your option) any later version. 8 | * 9 | * This program is distributed in the hope that it will be useful, 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | * GNU General Public License for more details. 13 | * 14 | * You should have received a copy of the GNU General Public License 15 | * along with this program. If not, see . 16 | */ 17 | 18 | use std::env; 19 | use std::fs::File; 20 | use std::io; 21 | 22 | use getopts::Options; 23 | use nom::character::complete::{char, line_ending}; 24 | use nom::combinator::{map, opt}; 25 | use nom::error::{Error, ErrorKind}; 26 | use nom::multi::many1; 27 | use nom::number::complete::hex_u32; 28 | use nom::sequence::{preceded, tuple}; 29 | use nom::{AsBytes, Err, IResult}; 30 | use serde_derive::{Deserialize, Serialize}; 31 | 32 | /// Network data processing statistics 33 | #[derive(Debug, Eq, PartialEq, Serialize, Deserialize)] 34 | struct SoftnetStat { 35 | /// The number of network frames processed. 36 | /// 37 | /// This can be more than the total number of network frames received if 38 | /// you are using ethernet bonding. There are cases where the ethernet 39 | /// bonding driver will trigger network data to be re-processed, which 40 | /// would increment the processed count more than once for the same packet. 41 | pub processed: u32, 42 | 43 | /// The number of network frames dropped because there was no room on the processing queue. 44 | pub dropped: u32, 45 | 46 | /// The number of times the `net_rx_action` loop terminated because the budget was consumed or 47 | /// the time limit was reached, but more work could have been. 48 | pub time_squeeze: u32, 49 | 50 | /// The number of times a collision occurred when trying to obtain a device lock 51 | /// when transmitting packets. 52 | /// 53 | /// This was removed in kernel v4.7 54 | pub cpu_collision: u32, 55 | 56 | /// The number of times this CPU has been woken up to process packets via an Inter-processor Interrupt. 57 | /// 58 | /// Support was added in kernel v2.6.36 59 | pub received_rps: Option, 60 | 61 | /// The number of times the flow limit has been reached. 62 | /// 63 | /// Flow limiting is an optional Receive Packet Steering feature. 64 | /// 65 | /// Support was added in kernel v3.11 66 | pub flow_limit_count: Option, 67 | 68 | /// The network backlog length. 69 | /// 70 | /// Support was added in kernel v5.10 71 | pub backlog_len: Option, 72 | 73 | /// The cpu_id is the CPU id owning this softnet data. 74 | /// 75 | /// There is not a direct match between softnet_stat 76 | /// lines and the related CPU. Offline CPUs are not dumped. 77 | /// 78 | /// Support was added in kernel v5.10 79 | pub cpu_id: Option, 80 | 81 | /// Input backlog queue length 82 | /// 83 | /// Support was added in kernel v6.4 84 | pub input_qlen: Option, 85 | 86 | /// Process backlog queue length 87 | /// 88 | /// Support was added in kernel v6.4 89 | pub process_qlen: Option 90 | } 91 | 92 | fn main() { 93 | let args: Vec = env::args().collect(); 94 | let program = args[0].clone(); 95 | 96 | let mut opts = Options::new(); 97 | opts.optflag("j", "json", "use json output"); 98 | opts.optflag("p", "prometheus", "use prometheus output"); 99 | opts.optflag("h", "help", "print this help menu"); 100 | opts.optflag("s", "stdin", "read from stdin"); 101 | 102 | let matches = match opts.parse(&args[1..]) { 103 | Ok(m) => m, 104 | Err(e) => panic!("Failed to parse options - {}", e), 105 | }; 106 | 107 | if matches.opt_present("h") { 108 | print_usage(&program, opts); 109 | return; 110 | } 111 | 112 | let file = "/proc/net/softnet_stat"; 113 | 114 | let raw = if matches.opt_present("s") { 115 | let handle = io::stdin(); 116 | read_proc_file(handle).expect("Failed to read proc from stdin") 117 | } else { 118 | let handle = File::open(file).expect("Failed to open file"); 119 | read_proc_file(handle).expect("Failed to read proc from file") 120 | }; 121 | 122 | let stats = match parse_softnet_stats(&raw) { 123 | Ok((_, value)) => value, 124 | Err(Err::Incomplete(needed)) => { 125 | panic!("{} is in an unsupported format. Needed: {:?}", file, needed) 126 | } 127 | Err(Err::Error(e)) | Err(Err::Failure(e)) => { 128 | panic!("Error while parsing {}: {:?}", file, e) 129 | } 130 | }; 131 | 132 | if matches.opt_present("j") { 133 | json(&stats); 134 | } else if matches.opt_present("p") { 135 | prometheus(&stats); 136 | } else { 137 | print(&stats, 15); 138 | } 139 | } 140 | 141 | fn read_proc_file(mut handle: R) -> io::Result> 142 | where 143 | R: io::Read, 144 | { 145 | let mut buf = vec![]; 146 | handle.read_to_end(&mut buf)?; 147 | 148 | Ok(buf) 149 | } 150 | 151 | fn parse_softnet_stats(input: &[u8]) -> IResult<&[u8], Vec> { 152 | many1(parse_softnet_line)(input) 153 | } 154 | 155 | fn parse_softnet_line(input: &[u8]) -> IResult<&[u8], SoftnetStat> { 156 | if input.as_bytes().is_empty() { 157 | return Err(Err::Error(Error::new(input, ErrorKind::Eof))); 158 | } 159 | 160 | let line = tuple(( 161 | hex_u32, // processed 162 | preceded(space, hex_u32), // dropped 163 | preceded(space, hex_u32), // time_squeeze 164 | preceded(space, hex_u32), 165 | preceded(space, hex_u32), 166 | preceded(space, hex_u32), 167 | preceded(space, hex_u32), 168 | preceded(space, hex_u32), 169 | preceded(space, hex_u32), // cpu collision 170 | opt(preceded(space, hex_u32)), // received_rps 171 | opt(preceded(space, hex_u32)), // flow_limit_count 172 | opt(preceded(space, hex_u32)), // backlog_len (input_qlen + process_qlen) 173 | opt(preceded(space, hex_u32)), // cpu_id 174 | opt(preceded(space, hex_u32)), // input_qlen 175 | opt(preceded(space, hex_u32)), // process_qlen 176 | line_ending, 177 | )); 178 | 179 | let mut parser = map(line, |result| SoftnetStat { 180 | processed: result.0, 181 | dropped: result.1, 182 | time_squeeze: result.2, 183 | cpu_collision: result.8, 184 | received_rps: result.9, 185 | flow_limit_count: result.10, 186 | backlog_len: result.11, 187 | cpu_id: result.12, 188 | input_qlen: result.13, 189 | process_qlen: result.14 190 | }); 191 | 192 | parser(input) 193 | } 194 | 195 | fn space(input: &[u8]) -> IResult<&[u8], char> { 196 | char(' ')(input) 197 | } 198 | 199 | fn print_usage(program: &str, opts: Options) { 200 | let brief = format!("Usage: {} [options]", program); 201 | print!("{}", opts.usage(&brief)); 202 | } 203 | 204 | fn print(stats: &[SoftnetStat], spacer: usize) { 205 | println!( 206 | "{: