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bug: fix uptime calculation for Linux (#1410)
* bug: fix uptime for linux Use another calculation to determine the uptime of a process on Linux. * appease clippy * changelog * edit add
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@ -21,6 +21,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
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- [#1314](https://github.com/ClementTsang/bottom/pull/1314): Fix fat32 mounts not showing up in macOS.
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- [#1355](https://github.com/ClementTsang/bottom/pull/1355): Reduce chances of non-D0 devices waking up due to temperature checks on Linux.
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- [#1410](https://github.com/ClementTsang/bottom/pull/1410): Fix uptime calculation for Linux.
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## [0.9.6] - 2023-08-26
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@ -74,7 +74,7 @@ pub struct ProcessHarvest {
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/// The current state of the process (e.g. zombie, asleep).
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pub process_state: (String, char),
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/// Cumulative total CPU time used.
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/// Cumulative process uptime.
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pub time: Duration,
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/// This is the *effective* user ID of the process. This is only used on Unix platforms.
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@ -109,7 +109,7 @@ impl ProcessHarvest {
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self.write_bytes_per_sec += rhs.write_bytes_per_sec;
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self.total_read_bytes += rhs.total_read_bytes;
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self.total_write_bytes += rhs.total_write_bytes;
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self.time += rhs.time;
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self.time = self.time.max(rhs.time);
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#[cfg(feature = "gpu")]
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{
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self.gpu_mem += rhs.gpu_mem;
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@ -132,9 +132,7 @@ fn get_linux_cpu_usage(
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}
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fn read_proc(
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prev_proc: &PrevProcDetails, process: Process, cpu_usage: f64, cpu_fraction: f64,
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use_current_cpu_total: bool, time_difference_in_secs: u64, total_memory: u64,
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user_table: &mut UserTable,
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prev_proc: &PrevProcDetails, process: Process, args: ReadProcArgs, user_table: &mut UserTable,
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) -> error::Result<(ProcessHarvest, u64)> {
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let Process {
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pid: _,
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@ -144,6 +142,15 @@ fn read_proc(
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cmdline,
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} = process;
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let ReadProcArgs {
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use_current_cpu_total,
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cpu_usage,
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cpu_fraction,
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total_memory,
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time_difference_in_secs,
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uptime,
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} = args;
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let (command, name) = {
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let truncated_name = stat.comm.as_str();
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if let Ok(cmdline) = cmdline {
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@ -231,7 +238,7 @@ fn read_proc(
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if ticks_per_sec == 0 {
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Duration::ZERO
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} else {
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Duration::from_secs(stat.utime + stat.stime) / ticks_per_sec
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Duration::from_secs(uptime.saturating_sub(stat.start_time / ticks_per_sec as u64))
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}
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} else {
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Duration::ZERO
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@ -279,6 +286,17 @@ fn is_str_numeric(s: &str) -> bool {
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s.chars().all(|c| c.is_ascii_digit())
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}
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/// General args to keep around for reading proc data.
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#[derive(Copy, Clone)]
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pub(crate) struct ReadProcArgs {
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pub(crate) use_current_cpu_total: bool,
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pub(crate) cpu_usage: f64,
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pub(crate) cpu_fraction: f64,
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pub(crate) total_memory: u64,
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pub(crate) time_difference_in_secs: u64,
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pub(crate) uptime: u64,
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}
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pub(crate) fn linux_process_data(
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collector: &mut DataCollector, time_difference_in_secs: u64,
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) -> error::Result<Vec<ProcessHarvest>> {
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@ -329,6 +347,15 @@ pub(crate) fn linux_process_data(
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}
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});
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let args = ReadProcArgs {
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use_current_cpu_total,
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cpu_usage,
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cpu_fraction,
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total_memory,
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time_difference_in_secs,
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uptime: sysinfo::System::uptime(),
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};
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let process_vector: Vec<ProcessHarvest> = pids
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.filter_map(|pid_path| {
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if let Ok(process) = Process::from_path(pid_path) {
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@ -336,16 +363,9 @@ pub(crate) fn linux_process_data(
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let prev_proc_details = pid_mapping.entry(pid).or_default();
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#[allow(unused_mut)]
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if let Ok((mut process_harvest, new_process_times)) = read_proc(
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prev_proc_details,
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process,
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cpu_usage,
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cpu_fraction,
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use_current_cpu_total,
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time_difference_in_secs,
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total_memory,
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user_table,
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) {
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if let Ok((mut process_harvest, new_process_times)) =
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read_proc(prev_proc_details, process, args, user_table)
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{
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#[cfg(feature = "gpu")]
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if let Some(gpus) = &collector.gpu_pids {
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gpus.iter().for_each(|gpu| {
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@ -26,7 +26,8 @@ fn next_part<'a>(iter: &mut impl Iterator<Item = &'a str>) -> Result<&'a str, io
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.ok_or_else(|| io::Error::from(io::ErrorKind::InvalidData))
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}
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/// A wrapper around the data in `/proc/<PID>/stat`. For documentation, see [here](https://man7.org/linux/man-pages/man5/proc.5.html).
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/// A wrapper around the data in `/proc/<PID>/stat`. For documentation, see
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/// [here](https://man7.org/linux/man-pages/man5/proc.5.html).
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///
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/// Note this does not necessarily get all fields, only the ones we use in bottom.
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pub(crate) struct Stat {
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@ -47,6 +48,9 @@ pub(crate) struct Stat {
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/// The resident set size, or the number of pages the process has in real memory.
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pub rss: u64,
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/// The start time of the process, represented in clock ticks.
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pub start_time: u64,
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}
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impl Stat {
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@ -76,18 +80,19 @@ impl Stat {
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.chars()
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.next()
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.ok_or_else(|| anyhow!("missing state"))?;
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let ppid: Pid = next_part(&mut rest)?.parse()?;
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// Skip 9 fields until utime (pgrp, session, tty_nr, tpgid, flags, minflt, cminflt, majflt, cmajflt).
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let mut rest = rest.skip(9);
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let utime: u64 = next_part(&mut rest)?.parse()?;
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let stime: u64 = next_part(&mut rest)?.parse()?;
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// Skip 8 fields until rss (cutime, cstime, priority, nice, num_threads, itrealvalue, starttime, vsize).
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let mut rest = rest.skip(8);
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// Skip 6 fields until starttime (cutime, cstime, priority, nice, num_threads, itrealvalue).
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let mut rest = rest.skip(6);
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let start_time: u64 = next_part(&mut rest)?.parse()?;
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// Skip one field until rss (vsize)
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let mut rest = rest.skip(1);
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let rss: u64 = next_part(&mut rest)?.parse()?;
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Ok(Stat {
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@ -97,6 +102,7 @@ impl Stat {
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utime,
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stime,
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rss,
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start_time,
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})
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}
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@ -263,6 +263,7 @@ impl ProcWidgetData {
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self.wps += other.wps;
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self.total_read += other.total_read;
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self.total_write += other.total_write;
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self.time = self.time.max(other.time);
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#[cfg(feature = "gpu")]
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{
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self.gpu_mem_usage = match (&self.gpu_mem_usage, &other.gpu_mem_usage) {
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