mirror of
https://github.com/containers/youki
synced 2024-05-06 15:46:17 +02:00
97848f1ce6
* Updated cgroup oci-spec-rs to 0.5.1 Signed-off-by: Takashi IIGUNI <iiguni.tks@gmail.com>
185 lines
6.2 KiB
Rust
185 lines
6.2 KiB
Rust
use std::{collections::HashMap, path::Path};
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use anyhow::{bail, Context, Result};
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use crate::{
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common::{self, ControllerOpt},
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stats::{supported_page_sizes, HugeTlbStats, StatsProvider},
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};
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use super::Controller;
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use oci_spec::runtime::LinuxHugepageLimit;
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pub struct HugeTlb {}
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impl Controller for HugeTlb {
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type Resource = Vec<LinuxHugepageLimit>;
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fn apply(controller_opt: &ControllerOpt, cgroup_root: &std::path::Path) -> Result<()> {
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log::debug!("Apply Hugetlb cgroup config");
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if let Some(hugepage_limits) = Self::needs_to_handle(controller_opt) {
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for hugetlb in hugepage_limits {
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Self::apply(cgroup_root, hugetlb)
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.context("failed to apply hugetlb resource restrictions")?
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}
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}
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Ok(())
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}
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fn needs_to_handle<'a>(controller_opt: &'a ControllerOpt) -> Option<&'a Self::Resource> {
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if let Some(hugepage_limits) = controller_opt.resources.hugepage_limits().as_ref() {
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if !hugepage_limits.is_empty() {
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return controller_opt.resources.hugepage_limits().as_ref();
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}
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}
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None
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}
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}
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impl StatsProvider for HugeTlb {
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type Stats = HashMap<String, HugeTlbStats>;
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fn stats(cgroup_path: &Path) -> Result<Self::Stats> {
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let page_sizes = supported_page_sizes()?;
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let mut hugetlb_stats = HashMap::with_capacity(page_sizes.len());
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for page_size in &page_sizes {
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let stats = Self::stats_for_page_size(cgroup_path, page_size)?;
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hugetlb_stats.insert(page_size.to_owned(), stats);
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}
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Ok(hugetlb_stats)
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}
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}
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impl HugeTlb {
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fn apply(root_path: &Path, hugetlb: &LinuxHugepageLimit) -> Result<()> {
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let page_size: String = hugetlb
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.page_size()
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.chars()
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.take_while(|c| c.is_digit(10))
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.collect();
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let page_size: u64 = page_size.parse()?;
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if !Self::is_power_of_two(page_size) {
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bail!("page size must be in the format of 2^(integer)");
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}
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common::write_cgroup_file(
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root_path.join(format!("hugetlb.{}.limit_in_bytes", hugetlb.page_size())),
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hugetlb.limit(),
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)?;
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Ok(())
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}
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fn is_power_of_two(number: u64) -> bool {
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(number != 0) && (number & (number - 1)) == 0
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}
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fn stats_for_page_size(cgroup_path: &Path, page_size: &str) -> Result<HugeTlbStats> {
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let mut stats = HugeTlbStats::default();
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let usage_file = format!("hugetlb.{}.usage_in_bytes", page_size);
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let usage_content = common::read_cgroup_file(cgroup_path.join(usage_file))?;
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stats.usage = usage_content.trim().parse()?;
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let max_file = format!("hugetlb.{}.max_usage_in_bytes", page_size);
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let max_content = common::read_cgroup_file(cgroup_path.join(max_file))?;
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stats.max_usage = max_content.trim().parse()?;
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let failcnt_file = format!("hugetlb.{}.failcnt", page_size);
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let failcnt_content = common::read_cgroup_file(cgroup_path.join(failcnt_file))?;
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stats.fail_count = failcnt_content.trim().parse()?;
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Ok(stats)
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use crate::test::{create_temp_dir, set_fixture};
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use oci_spec::runtime::LinuxHugepageLimitBuilder;
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use std::fs::read_to_string;
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#[test]
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fn test_set_hugetlb() {
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let page_file_name = "hugetlb.2MB.limit_in_bytes";
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let tmp = create_temp_dir("test_set_hugetlb").expect("create temp directory for test");
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set_fixture(&tmp, page_file_name, "0").expect("Set fixture for 2 MB page size");
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let hugetlb = LinuxHugepageLimitBuilder::default()
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.page_size("2MB")
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.limit(16384)
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.build()
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.unwrap();
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HugeTlb::apply(&tmp, &hugetlb).expect("apply hugetlb");
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let content = read_to_string(tmp.join(page_file_name)).expect("Read hugetlb file content");
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assert_eq!(hugetlb.limit().to_string(), content);
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}
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#[test]
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fn test_set_hugetlb_with_invalid_page_size() {
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let tmp = create_temp_dir("test_set_hugetlb_with_invalid_page_size")
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.expect("create temp directory for test");
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let hugetlb = LinuxHugepageLimitBuilder::default()
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.page_size("3MB")
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.limit(16384)
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.build()
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.unwrap();
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let result = HugeTlb::apply(&tmp, &hugetlb);
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assert!(
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result.is_err(),
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"page size that is not a power of two should be an error"
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);
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}
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quickcheck! {
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fn property_test_set_hugetlb(hugetlb: LinuxHugepageLimit) -> bool {
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let page_file_name = format!("hugetlb.{:?}.limit_in_bytes", hugetlb.page_size());
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let tmp = create_temp_dir("property_test_set_hugetlb").expect("create temp directory for test");
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set_fixture(&tmp, &page_file_name, "0").expect("Set fixture for page size");
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let result = HugeTlb::apply(&tmp, &hugetlb);
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let page_size: String = hugetlb
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.page_size()
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.chars()
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.take_while(|c| c.is_digit(10))
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.collect();
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let page_size: u64 = page_size.parse().expect("parse page size");
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if HugeTlb::is_power_of_two(page_size) && page_size != 1 {
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let content =
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read_to_string(tmp.join(page_file_name)).expect("Read hugetlb file content");
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hugetlb.limit().to_string() == content
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} else {
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result.is_err()
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}
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}
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}
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#[test]
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fn test_stat_hugetlb() {
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let tmp = create_temp_dir("test_stat_hugetlb").expect("create temp directory for test");
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set_fixture(&tmp, "hugetlb.2MB.usage_in_bytes", "1024\n").expect("set hugetlb usage");
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set_fixture(&tmp, "hugetlb.2MB.max_usage_in_bytes", "4096\n")
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.expect("set hugetlb max usage");
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set_fixture(&tmp, "hugetlb.2MB.failcnt", "5").expect("set hugetlb fail count");
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let actual = HugeTlb::stats_for_page_size(&tmp, "2MB").expect("get cgroup stats");
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let expected = HugeTlbStats {
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usage: 1024,
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max_usage: 4096,
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fail_count: 5,
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};
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assert_eq!(actual, expected);
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}
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}
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