diff --git a/distro/OpenAnolis/README.md b/distro/OpenAnolis/README.md index d492a43..42ea9a6 100755 --- a/distro/OpenAnolis/README.md +++ b/distro/OpenAnolis/README.md @@ -2,14 +2,9 @@ ===================== -[Alibaba Cloud Linux 2](https://help.aliyun.com/document_detail/154950.html) - - - - - -[Alibaba Cloud Linux 2功能和接口概述](https://help.aliyun.com/document_detail/177687.html) +- [x] [Alibaba Cloud Linux 2](https://help.aliyun.com/document_detail/154950.html) +- [x] [Alibaba Cloud Linux 2功能和接口概述](https://help.aliyun.com/document_detail/177687.html) 如果您对Linux的内核系统有一定的了解，并且有需求需要使用Linux内核功能，您可以依据下表提供的Alibaba Cloud Linux 2的内核功能与接口进行相关操作. @@ -37,19 +32,54 @@ ```cpp -abd7f977069d alinux: sched: Fix a branch prediction error in static_key -a66f5804aa67 alinux: sched: Fix compiling error without CONFIG_FAIR_GROUP_SCHED -252315eb68be alinux: sched: get_sched_lat_count_idx optimization -b2250b442fa9 alinux: sched: Fix per-cgroup idle accounting deadlock +git log --oneline | grep alinux | grep -E "sched|cpuacct" +``` + +```cpp +06d7286d7c8e alinux: sched: add kconfig SCHED_SLI +``` + +## 1.1 Latency Histograms +------- + +```cpp +echo 1 > /proc/cpusli/sched_lat_enabled + +mount -t tmpfs cgroup_root /sys/fs/cgroup +mkdir -p /sys/fs/cgroup/cpu,cpuacct +mount -t cgroup -o cpu,cpuacct cpu,cpuacct /sys/fs/cgroup/cpu,cpuacct +``` + +cpuacct 中引入了一些调度相关的 latency 的统计信息, 并用 histograms 的方式输出. + +| 接口 | 描述 | 实现思路 | commit | +|:---:|:----:|:-------:|:-------:| +| cpuacct.wait_latency | 在就绪队列里的等待时间 | 统计方式同 wait_sum/wait_start 等计数器. enqueue_entity 入队时开始计时, 出队时结束计时(set_next_entity 准备投入运行时, 也会出队.)| [alinux: sched: Introduce cfs scheduling latency histograms](https://github.com/alibaba/cloud-kernel/commit/76d98609f83244bdc5f3484945a47cc43d509f64) | +| cpuacct.cgroup_wait_latency | 在就绪队列里的等待时间 | 统计方式同 wait_sum/wait_start 等计数器. enqueue_entity 入队时开始计时, 出队时结束计时(set_next_entity 准备投入运行时, 也会出队.)| [alinux: sched: Add cgroup's scheduling latency histograms](https://github.com/alibaba/cloud-kernel/commit/6dbaddaa480a315f1fd5d66d16c0b3a0c3dd25ea) | +| cpuacct.block_latency/cpuacct.ioblock_latency | 统计进程 D 状态阻塞的时间(其中 ioblock_latency 统计因为 I/O 阻塞的等待时间) | 更新方式 block_latency 同 block_start, ioblock_latency 同 iowait_sum.
进程出队 update_stats_dequeue 开始计时, 进程入队的时候 update_stats_enqueue_sleeper 停止计时 |[alinux: sched: Add cgroup-level blocked time histograms](https://github.com/alibaba/cloud-kernel/commit/a055ee2ce27b61864adf67fe2ffc426b89913b89) | + + +```cpp ab81d2d9f745 alinux: sched: Add cpu_stress to show system-wide task waiting c7462cfec178 alinux: sched: Fix wrong cpuacct_update_latency declaration fa418988c52e alinux: sched: Finer grain of sched latency + 2abfd07b1c1a alinux: sched: Add "nr" to sched latency histogram 6dbaddaa480a alinux: sched: Add cgroup's scheduling latency histograms a055ee2ce27b alinux: sched: Add cgroup-level blocked time histograms 76d98609f832 alinux: sched: Introduce cfs scheduling latency histograms -bcaf8afd6270 alinux: sched: Add switch for scheduler_tick load tracking -bb48b716f496 alinux: sched: Add switch for update_blocked_averages +``` + +## 1.2 CPUACCT STAT +------- + +cpuacct 中引入的 proc_stat 统计了 CGROUP 分组中进程的 CPU 占用/空闲等统计信息 + +| 接口 | 描述 | 实现思路 | commit | +|:---:|:----:|:-------:|:-------:| +| cpuacct.proc_stat | cpuacct 的详细统计信息 | NA | [commit 9be0ac2bcbaa ("alinux: cpuacct: export cpuacct.proc_stat interface")](https://github.com/alibaba/cloud-kernel/commit/9be0ac2bcbaa1831196a88f5e81ea162811f3418) | + +```cpp 1c5ab7a7f5d9 alinux: sched: Fix %steal in cpuacct.proc_stat in guest OS 1607a4855848 alinux: sched: Fix regression caused by nr_uninterruptible 1e0cec0b58c7 alinux: sched: make SCHED_SLI dependent on FAIR_GROUP_SCHED @@ -58,7 +88,50 @@ bb48b716f496 alinux: sched: Add switch for update_blocked_averages 9e7b35d6d84e alinux: sched: Introduce per-cgroup iowait accounting c75529800bf2 alinux: sched: Introduce per-cgroup steal accounting 61e5885959be alinux: sched: Introduce per-cgroup idle accounting +965d75d3785c alinux: cpuacct: make cpuacct record nr_migrations +9410d3142882 alinux: cpuacct: Export nr_running & nr_uninterruptible 004b3ba9ebd3 alinux: sched/cputime: Fix guest cputime of cpuacct.proc_stat +8ab45c97b581 alinux: cpuacct/proc_stat: Consider isolcpus +9be0ac2bcbaa alinux: cpuacct: export cpuacct.proc_stat interface 36da4fe9851a alinux: sched: Maintain "nr_uninterruptible" in runqueue 06d7286d7c8e alinux: sched: add kconfig SCHED_SLI +``` + + +## 1.3 PSI V1 +------- + +```cpp +1bd8a72b1181 alinux: psi: using cpuacct_cgrp_id under CONFIG_CGROUP_CPUACCT +1f49a7385032 alinux: psi: Support PSI under cgroup v1 +dc159a61c043 alinux: introduce psi_v1 boot parameter +``` + +# 2 Scheduler +------- + + +## 2.1 + +```cpp +bcaf8afd6270 alinux: sched: Add switch for scheduler_tick load tracking +bb48b716f496 alinux: sched: Add switch for update_blocked_averages +d2440c99979d alinux: sched/fair: use static load in wake_affine_weight +``` + +## 2.2 burst 等 +------- + + +```cpp +db83ac46e3f5 alinux: cpuacct: Export nr_running & nr_uninterruptible +982358c4f1f0 alinux: sched: Maintain "nr_uninterruptible" in runqueue +3a022fb07707 alinux: sched/fair: Fix CPU burst stat +a97cbf90404c alinux: sched/fair: Introduce init buffer into CFS burst +95527c5751fa alinux: sched: Restore upper limit of cfs_b->buffer to max_cfs_runtime +a0b0376bdbdc alinux: sched: Add document for burstable CFS bandwidth control +744d0dc11559 alinux: sched: Add cfs bandwidth burst statistics +739156b53e75 alinux: sched: Make CFS bandwidth controller burstable +d9ba6d0880e3 alinux: sched: Introduce primitives for CFS bandwidth burst +9d168f216486 alinux: sched: Defend cfs and rt bandwidth against overflow ``` \ No newline at end of file diff --git a/distro/OpenAnolis/cpuacct_proc_stat.png b/distro/OpenAnolis/cpuacct_proc_stat.png new file mode 100644 index 0000000..94d57ff Binary files /dev/null and b/distro/OpenAnolis/cpuacct_proc_stat.png differ