Process disk rw

README.md

@@ -108,20 +108,21 @@ Here are the current results:
 <details>
 
 ```text
-test bench_new                     ... bench:       3,741 ns/iter (+/- 252)
-test bench_new_all                 ... bench:  10,491,084 ns/iter (+/- 450,925)
-test bench_refresh_all             ... bench:   2,787,974 ns/iter (+/- 235,649)
-test bench_refresh_components      ... bench:      24,270 ns/iter (+/- 1,127)
-test bench_refresh_components_list ... bench:     370,693 ns/iter (+/- 51,925)
-test bench_refresh_cpu             ... bench:      13,367 ns/iter (+/- 1,858)
-test bench_refresh_disks           ... bench:       2,532 ns/iter (+/- 108)
-test bench_refresh_disks_lists     ... bench:      50,359 ns/iter (+/- 5,877)
-test bench_refresh_memory          ... bench:      11,713 ns/iter (+/- 1,006)
-test bench_refresh_networks        ... bench:     220,246 ns/iter (+/- 24,294)
-test bench_refresh_networks_list   ... bench:     229,648 ns/iter (+/- 82,050)
-test bench_refresh_process         ... bench:      77,375 ns/iter (+/- 10,657)
-test bench_refresh_processes       ... bench:   2,282,106 ns/iter (+/- 154,098)
-test bench_refresh_system          ... bench:      52,466 ns/iter (+/- 4,710)
+test bench_new                     ... bench:     186,638 ns/iter (+/- 8,603)
+test bench_new_all                 ... bench:  18,604,576 ns/iter (+/- 1,323,790)
+test bench_refresh_all             ... bench:   5,147,523 ns/iter (+/- 337,096)
+test bench_refresh_components      ... bench:      25,391 ns/iter (+/- 1,725)
+test bench_refresh_components_list ... bench:     381,490 ns/iter (+/- 18,237)
+test bench_refresh_cpu             ... bench:      13,397 ns/iter (+/- 880)
+test bench_refresh_disks           ... bench:       2,515 ns/iter (+/- 161)
+test bench_refresh_disks_list      ... bench:      50,986 ns/iter (+/- 5,301)
+test bench_refresh_memory          ... bench:      11,843 ns/iter (+/- 779)
+test bench_refresh_networks        ... bench:     250,242 ns/iter (+/- 68,482)
+test bench_refresh_networks_list   ... bench:     255,148 ns/iter (+/- 23,677)
+test bench_refresh_process         ... bench:     128,860 ns/iter (+/- 22,638)
+test bench_refresh_processes       ... bench:   4,714,965 ns/iter (+/- 309,573)
+test bench_refresh_system          ... bench:      52,044 ns/iter (+/- 4,510)
+test bench_refresh_users_list      ... bench:   2,095,043 ns/iter (+/- 648,385)
 ```
 </details>
 
@@ -130,20 +131,21 @@ test bench_refresh_system          ... bench:      52,466 ns/iter (+/- 4,710)
 <details>
 
 ```text
-test bench_new                     ... bench:   7,688,460 ns/iter (+/- 1,230,010)
-test bench_new_all                 ... bench:  24,098,860 ns/iter (+/- 5,260,950)
-test bench_refresh_all             ... bench:   3,096,107 ns/iter (+/- 94,257)
-test bench_refresh_components      ... bench:   1,205,378 ns/iter (+/- 40,071)
-test bench_refresh_components_list ... bench:   3,181,602 ns/iter (+/- 102,533)
-test bench_refresh_cpu             ... bench:         395 ns/iter (+/- 18)
-test bench_refresh_disks           ... bench:      53,082 ns/iter (+/- 1,834)
-test bench_refresh_disks_lists     ... bench:     114,080 ns/iter (+/- 1,920)
-test bench_refresh_memory          ... bench:         596 ns/iter (+/- 48)
-test bench_refresh_networks        ... bench:      37,549 ns/iter (+/- 1,622)
-test bench_refresh_networks_list   ... bench:     667,180 ns/iter (+/- 59,859)
-test bench_refresh_process         ... bench:         755 ns/iter (+/- 47)
-test bench_refresh_processes       ... bench:   1,217,488 ns/iter (+/- 69,041)
-test bench_refresh_system          ... bench:   1,214,780 ns/iter (+/- 52,013)
+test bench_new                     ... bench:   7,335,755 ns/iter (+/- 469,000)
+test bench_new_all                 ... bench:  32,233,480 ns/iter (+/- 1,567,239)
+test bench_refresh_all             ... bench:   1,433,015 ns/iter (+/- 126,322)
+test bench_refresh_components      ... bench:           1 ns/iter (+/- 0)
+test bench_refresh_components_list ... bench:   9,835,060 ns/iter (+/- 407,072)
+test bench_refresh_cpu             ... bench:      33,873 ns/iter (+/- 2,177)
+test bench_refresh_disks           ... bench:      58,951 ns/iter (+/- 6,128)
+test bench_refresh_disks_list      ... bench:     125,199 ns/iter (+/- 2,741)
+test bench_refresh_memory          ... bench:       1,004 ns/iter (+/- 56)
+test bench_refresh_networks        ... bench:      39,013 ns/iter (+/- 2,676)
+test bench_refresh_networks_list   ... bench:   1,341,850 ns/iter (+/- 78,258)
+test bench_refresh_process         ... bench:       2,116 ns/iter (+/- 58)
+test bench_refresh_processes       ... bench:   1,032,447 ns/iter (+/- 57,695)
+test bench_refresh_system          ... bench:      35,374 ns/iter (+/- 3,200)
+test bench_refresh_users_list      ... bench:   3,321,140 ns/iter (+/- 135,160)
 ```
 </details>
 
@@ -152,20 +154,21 @@ test bench_refresh_system          ... bench:   1,214,780 ns/iter (+/- 52,013)
 <details>
 
 ```text
-test bench_new                     ... bench:      56,861 ns/iter (+/- 5,653)
-test bench_new_all                 ... bench:   4,634,509 ns/iter (+/- 1,604,369)
-test bench_refresh_all             ... bench:   1,962,343 ns/iter (+/- 129,726)
-test bench_refresh_components      ... bench:     294,752 ns/iter (+/- 45,107)
-test bench_refresh_components_list ... bench:     895,672 ns/iter (+/- 112,586)
-test bench_refresh_cpu             ... bench:      11,187 ns/iter (+/- 2,483)
-test bench_refresh_disks           ... bench:         975 ns/iter (+/- 50)
-test bench_refresh_disks_lists     ... bench:      25,955 ns/iter (+/- 3,159)
-test bench_refresh_memory          ... bench:       3,440 ns/iter (+/- 198)
-test bench_refresh_networks        ... bench:     211,552 ns/iter (+/- 16,686)
-test bench_refresh_networks_list   ... bench:     211,138 ns/iter (+/- 22,644)
-test bench_refresh_process         ... bench:       4,174 ns/iter (+/- 1,249)
-test bench_refresh_processes       ... bench:     803,559 ns/iter (+/- 42,974)
-test bench_refresh_system          ... bench:     365,762 ns/iter (+/- 55,893)
+test bench_new                     ... bench:      86,404 ns/iter (+/- 9,402)
+test bench_new_all                 ... bench:  21,123,771 ns/iter (+/- 570,722)
+test bench_refresh_all             ... bench:   1,757,683 ns/iter (+/- 203,234)
+test bench_refresh_components      ... bench:     325,560 ns/iter (+/- 41,068)
+test bench_refresh_components_list ... bench:     989,827 ns/iter (+/- 221,093)
+test bench_refresh_cpu             ... bench:       8,535 ns/iter (+/- 487)
+test bench_refresh_disks           ... bench:         939 ns/iter (+/- 33)
+test bench_refresh_disks_lists     ... bench:      25,093 ns/iter (+/- 2,080)
+test bench_refresh_memory          ... bench:       2,174 ns/iter (+/- 55)
+test bench_refresh_networks        ... bench:     181,558 ns/iter (+/- 7,325)
+test bench_refresh_networks_list   ... bench:     180,410 ns/iter (+/- 2,414)
+test bench_refresh_process         ... bench:       5,570 ns/iter (+/- 431)
+test bench_refresh_processes       ... bench:     683,455 ns/iter (+/- 14,995)
+test bench_refresh_system          ... bench:     362,875 ns/iter (+/- 172,547)
+test bench_refresh_users_list      ... bench:  16,783,834 ns/iter (+/- 465,111)
 ```
 </details>
 

benches/basic.rs

@@ -71,7 +71,7 @@ fn bench_refresh_disks(b: &mut test::Bencher) {
 }
 
 #[bench]
-fn bench_refresh_disks_lists(b: &mut test::Bencher) {
+fn bench_refresh_disks_list(b: &mut test::Bencher) {
     let mut s = sysinfo::System::new();
 
     b.iter(move || {

src/common.rs

@@ -7,6 +7,7 @@
 use NetworkData;
 use Networks;
 use NetworksExt;
+use UserExt;
 
 /// Trait to have a common fallback for the [`Pid`][crate::Pid] type.
 pub trait AsU32 {
@@ -273,3 +274,162 @@ impl From<isize> for DiskType {
         }
     }
 }
+
+/// An enum representing signal on UNIX-like systems.
+#[repr(C)]
+#[derive(Clone, PartialEq, PartialOrd, Debug, Copy)]
+pub enum Signal {
+    /// Hangup detected on controlling terminal or death of controlling process.
+    Hangup = 1,
+    /// Interrupt from keyboard.
+    Interrupt = 2,
+    /// Quit from keyboard.
+    Quit = 3,
+    /// Illegal instruction.
+    Illegal = 4,
+    /// Trace/breakpoint trap.
+    Trap = 5,
+    /// Abort signal from C abort function.
+    Abort = 6,
+    // IOT trap. A synonym for SIGABRT.
+    // IOT = 6,
+    /// Bus error (bad memory access).
+    Bus = 7,
+    /// Floating point exception.
+    FloatingPointException = 8,
+    /// Kill signal.
+    Kill = 9,
+    /// User-defined signal 1.
+    User1 = 10,
+    /// Invalid memory reference.
+    Segv = 11,
+    /// User-defined signal 2.
+    User2 = 12,
+    /// Broken pipe: write to pipe with no readers.
+    Pipe = 13,
+    /// Timer signal from C alarm function.
+    Alarm = 14,
+    /// Termination signal.
+    Term = 15,
+    /// Stack fault on coprocessor (unused).
+    Stklft = 16,
+    /// Child stopped or terminated.
+    Child = 17,
+    /// Continue if stopped.
+    Continue = 18,
+    /// Stop process.
+    Stop = 19,
+    /// Stop typed at terminal.
+    TSTP = 20,
+    /// Terminal input for background process.
+    TTIN = 21,
+    /// Terminal output for background process.
+    TTOU = 22,
+    /// Urgent condition on socket.
+    Urgent = 23,
+    /// CPU time limit exceeded.
+    XCPU = 24,
+    /// File size limit exceeded.
+    XFSZ = 25,
+    /// Virtual alarm clock.
+    VirtualAlarm = 26,
+    /// Profiling time expired.
+    Profiling = 27,
+    /// Windows resize signal.
+    Winch = 28,
+    /// I/O now possible.
+    IO = 29,
+    // Pollable event (Sys V). Synonym for IO
+    //Poll = 29,
+    /// Power failure (System V).
+    Power = 30,
+    /// Bad argument to routine (SVr4).
+    Sys = 31,
+}
+
+/// A struct representing system load average value.
+///
+/// It is returned by [`SystemExt::get_load_average`][crate::SystemExt::get_load_average].
+///
+/// ```no_run
+/// use sysinfo::{System, SystemExt};
+///
+/// let s = System::new_all();
+/// let load_avg = s.get_load_average();
+/// println!(
+///     "one minute: {}%, five minutes: {}%, fifteen minutes: {}%",
+///     load_avg.one,
+///     load_avg.five,
+///     load_avg.fifteen,
+/// );
+/// ```
+#[repr(C)]
+#[derive(Default, Debug, Clone)]
+pub struct LoadAvg {
+    /// Average load within one minute.
+    pub one: f64,
+    /// Average load within five minutes.
+    pub five: f64,
+    /// Average load within fifteen minutes.
+    pub fifteen: f64,
+}
+
+/// Type containing user information.
+///
+/// It is returned by [`SystemExt::get_users`][crate::SystemExt::get_users].
+///
+/// ```no_run
+/// use sysinfo::{System, SystemExt};
+///
+/// let s = System::new_all();
+/// println!("users: {:?}", s.get_users());
+/// ```
+#[derive(PartialEq, Eq, PartialOrd, Ord, Debug)]
+pub struct User {
+    pub(crate) name: String,
+    pub(crate) groups: Vec<String>,
+}
+
+impl UserExt for User {
+    fn get_name(&self) -> &str {
+        &self.name
+    }
+
+    fn get_groups(&self) -> &[String] {
+        &self.groups
+    }
+}
+
+/// Type containing read and written bytes.
+///
+/// It is returned by [`ProcessExt::get_disk_usage`][crate::ProcessExt::get_disk_usage].
+///
+/// ```no_run
+/// use sysinfo::{ProcessExt, System, SystemExt};
+///
+/// let s = System::new_all();
+/// for (pid, process) in s.get_processes() {
+///     let disk_usage = process.get_disk_usage();
+///     println!("[{}] read bytes   : new/total => {}/{}",
+///         pid,
+///         disk_usage.read_bytes,
+///         disk_usage.total_read_bytes,
+///     );
+///     println!("[{}] written bytes: new/total => {}/{}",
+///         pid,
+///         disk_usage.written_bytes,
+///         disk_usage.total_written_bytes,
+///     );
+/// }
+/// ```
+#[derive(Debug, Default, Clone, Copy, PartialEq, PartialOrd)]
+pub struct DiskUsage {
+    /// Total number of written bytes.
+    pub total_written_bytes: u64,
+    /// Number of written bytes.
+    pub written_bytes: u64,
+    /// Total number of read bytes.
+    pub total_read_bytes: u64,
+    /// Number of read bytes.
+    pub read_bytes: u64,
+}

src/debug.rs

@@ -131,11 +131,17 @@ impl fmt::Debug for NetworkData {
             .field("packets income", &self.get_packets_received())
             .field("total packets income", &self.get_total_packets_received())
             .field("packets outcome", &self.get_packets_transmitted())
-            .field("total packets outcome", &self.get_total_packets_transmitted())
+            .field(
+                "total packets outcome",
+                &self.get_total_packets_transmitted(),
+            )
             .field("errors income", &self.get_errors_on_received())
             .field("total errors income", &self.get_total_errors_on_received())
             .field("errors outcome", &self.get_errors_on_transmitted())
-            .field("total errors outcome", &self.get_total_errors_on_transmitted())
+            .field(
+                "total errors outcome",
+                &self.get_total_errors_on_transmitted(),
+            )
             .finish()
     }
 }

src/linux/process.rs

@@ -11,6 +11,7 @@ use std::path::{Path, PathBuf};
 
 use libc::{c_int, gid_t, kill, uid_t};
 
+use DiskUsage;
 use Pid;
 use ProcessExt;
 
@@ -124,6 +125,10 @@ pub struct Process {
     /// Tasks run by this process.
     pub tasks: HashMap<Pid, Process>,
     pub(crate) stat_file: Option<File>,
+    old_read_bytes: u64,
+    old_written_bytes: u64,
+    read_bytes: u64,
+    written_bytes: u64,
 }
 
 impl ProcessExt for Process {
@@ -155,6 +160,10 @@ impl ProcessExt for Process {
                 HashMap::new()
             },
             stat_file: None,
+            old_read_bytes: 0,
+            old_written_bytes: 0,
+            read_bytes: 0,
+            written_bytes: 0,
         }
     }
 
@@ -215,6 +224,15 @@ impl ProcessExt for Process {
     fn cpu_usage(&self) -> f32 {
         self.cpu_usage
     }
+
+    fn get_disk_usage(&self) -> DiskUsage {
+        DiskUsage {
+            written_bytes: self.written_bytes - self.old_written_bytes,
+            total_written_bytes: self.written_bytes,
+            read_bytes: self.read_bytes - self.old_read_bytes,
+            total_read_bytes: self.read_bytes,
+        }
+    }
 }
 
 impl Drop for Process {
@@ -244,3 +262,32 @@ pub fn set_time(p: &mut Process, utime: u64, stime: u64) {
 pub fn has_been_updated(p: &Process) -> bool {
     p.updated
 }
+
+pub(crate) fn update_process_disk_activity(p: &mut Process, path: &Path) {
+    let mut path = PathBuf::from(path);
+    path.push("io");
+    let data = match super::system::get_all_data(&path, 16_384) {
+        Ok(d) => d,
+        Err(_) => return,
+    };
+    let mut done = 0;
+    for line in data.split("\n") {
+        let mut parts = line.split(": ");
+        match parts.next() {
+            Some("read_bytes") => {
+                p.old_read_bytes = p.read_bytes;
+                p.read_bytes = parts.next().and_then(|x| x.parse::<u64>().ok()).unwrap_or(0);
+            }
+            Some("write_bytes") => {
+                p.old_written_bytes = p.written_bytes;
+                p.written_bytes = parts.next().and_then(|x| x.parse::<u64>().ok()).unwrap_or(0);
+            }
+            _ => continue,
+        }
+        done += 1;
+        if done > 1 {
+            // No need to continue the reading.
+            break;
+        }
+    }
+}