use tokio threadpool and thread local metrics for readpool (tikv#4486)

* *:use tokio-threadpool and thread local metrics in Storage

Signed-off-by: Breezewish <breezewish@pingcap.com>

Cargo.toml

@@ -112,7 +112,7 @@ smallvec = { version = "0.6", features = ["union"] }
 flate2 = { version = "1.0", features = ["zlib"], default-features = false }
 more-asserts = "0.1"
 hyper = "0.12"
-tokio-threadpool = "0.1"
+tokio-threadpool = "0.1.13"
 vlog = "0.1.4"
 twoway = "0.2.0"
 cop_datatype = { path = "components/cop_datatype" }

components/test_coprocessor/src/fixture.rs

@@ -5,12 +5,11 @@ use super::*;
 use kvproto::kvrpcpb::Context;
 
 use tikv::coprocessor::codec::Datum;
-use tikv::coprocessor::{Endpoint, ReadPoolContext};
-use tikv::server::readpool::{self, ReadPool};
+use tikv::coprocessor::Endpoint;
+use tikv::server::readpool;
 use tikv::server::Config;
 use tikv::storage::kv::RocksEngine;
 use tikv::storage::{Engine, TestEngineBuilder};
-use tikv_util::worker::FutureWorker;
 
 #[derive(Clone)]
 pub struct ProductTable(Table);
@@ -54,15 +53,7 @@ pub fn init_data_with_engine_and_commit<E: Engine>(
     vals: &[(i64, Option<&str>, i64)],
     commit: bool,
 ) -> (Store<E>, Endpoint<E>) {
-    init_data_with_details(
-        ctx,
-        engine,
-        tbl,
-        vals,
-        commit,
-        &Config::default(),
-        &readpool::Config::default_for_test(),
-    )
+    init_data_with_details(ctx, engine, tbl, vals, commit, &Config::default())
 }
 
 pub fn init_data_with_details<E: Engine>(
@@ -72,7 +63,6 @@ pub fn init_data_with_details<E: Engine>(
     vals: &[(i64, Option<&str>, i64)],
     commit: bool,
     cfg: &Config,
-    read_pool_cfg: &readpool::Config,
 ) -> (Store<E>, Endpoint<E>) {
     let mut store = Store::from_engine(engine);
 
@@ -88,10 +78,8 @@ pub fn init_data_with_details<E: Engine>(
     if commit {
         store.commit_with_ctx(ctx);
     }
-    let pd_worker = FutureWorker::new("test-pd-worker");
-    let pool = ReadPool::new("readpool", read_pool_cfg, || {
-        ReadPoolContext::new(pd_worker.scheduler())
-    });
+
+    let pool = readpool::Builder::build_for_test();
     let cop = Endpoint::new(cfg, store.get_engine(), pool);
     (store, cop)
 }

components/test_raftstore/src/server.rs

@@ -19,7 +19,7 @@ use tikv::raftstore::store::fsm::{RaftBatchSystem, RaftRouter};
 use tikv::raftstore::store::{Callback, SnapManager};
 use tikv::raftstore::Result;
 use tikv::server::load_statistics::ThreadLoad;
-use tikv::server::readpool::ReadPool;
+use tikv::server::readpool;
 use tikv::server::resolve::{self, Task as ResolveTask};
 use tikv::server::transport::RaftStoreRouter;
 use tikv::server::transport::ServerRaftStoreRouter;
@@ -28,7 +28,8 @@ use tikv::server::{
     create_raft_storage, Config, Error, Node, PdStoreAddrResolver, RaftClient, Server,
     ServerTransport,
 };
-use tikv::storage::{self, RaftKv};
+
+use tikv::storage::RaftKv;
 use tikv_util::collections::{HashMap, HashSet};
 use tikv_util::security::SecurityManager;
 use tikv_util::worker::{FutureWorker, Worker};
@@ -126,11 +127,8 @@ impl Simulator for ServerCluster {
         let sim_router = SimulateTransport::new(raft_router);
 
         // Create storage.
-        let pd_worker = FutureWorker::new("test-future-worker");
-        let storage_read_pool =
-            ReadPool::new("store-read", &cfg.readpool.storage.build_config(), || {
-                storage::ReadPoolContext::new(pd_worker.scheduler())
-            });
+        let pd_worker = FutureWorker::new("test-pd-worker");
+        let storage_read_pool = readpool::Builder::build_for_test();
         let store = create_raft_storage(
             sim_router.clone(),
             &cfg.storage,
@@ -155,12 +153,9 @@ impl Simulator for ServerCluster {
         // Create pd client, snapshot manager, server.
         let (worker, resolver) = resolve::new_resolver(Arc::clone(&self.pd_client)).unwrap();
         let snap_mgr = SnapManager::new(tmp_str, Some(router.clone()));
-        let pd_worker = FutureWorker::new("test-pd-worker");
         let server_cfg = Arc::new(cfg.server.clone());
         let security_mgr = Arc::new(SecurityManager::new(&cfg.security).unwrap());
-        let cop_read_pool = ReadPool::new("cop", &cfg.readpool.coprocessor.build_config(), || {
-            coprocessor::ReadPoolContext::new(pd_worker.scheduler())
-        });
+        let cop_read_pool = readpool::Builder::build_for_test();
         let cop = coprocessor::Endpoint::new(&server_cfg, store.get_engine(), cop_read_pool);
         let mut server = None;
         for _ in 0..100 {

components/tikv_util/Cargo.toml

@@ -33,6 +33,7 @@ tikv_alloc = { path = "../tikv_alloc" }
 tokio-core = "0.1"
 tokio-timer = "0.2"
 tokio-executor = "0.1"
+tokio-threadpool = "0.1.13"
 serde = "1.0"
 serde_json = "1.0"
 serde_derive = "1.0"

components/tikv_util/src/future_pool/builder.rs

@@ -0,0 +1,79 @@
+// Copyright 2019 TiKV Project Authors. Licensed under Apache-2.0.
+
+use std::sync::Arc;
+
+use tokio_threadpool::Builder as TokioBuilder;
+
+use super::metrics::*;
+
+pub struct Builder {
+    inner_builder: TokioBuilder,
+    name_prefix: Option<String>,
+    on_tick: Option<Box<dyn Fn() + Send + Sync>>,
+}
+
+impl Builder {
+    pub fn new() -> Self {
+        Self {
+            inner_builder: TokioBuilder::new(),
+            name_prefix: None,
+            on_tick: None,
+        }
+    }
+
+    pub fn pool_size(&mut self, val: usize) -> &mut Self {
+        self.inner_builder.pool_size(val);
+        self
+    }
+
+    pub fn stack_size(&mut self, val: usize) -> &mut Self {
+        self.inner_builder.stack_size(val);
+        self
+    }
+
+    pub fn name_prefix(&mut self, val: impl Into<String>) -> &mut Self {
+        let name = val.into();
+        self.name_prefix = Some(name.clone());
+        self.inner_builder.name_prefix(name);
+        self
+    }
+
+    pub fn on_tick<F>(&mut self, f: F) -> &mut Self
+    where
+        F: Fn() + Send + Sync + 'static,
+    {
+        self.on_tick = Some(Box::new(f));
+        self
+    }
+
+    pub fn before_stop<F>(&mut self, f: F) -> &mut Self
+    where
+        F: Fn() + Send + Sync + 'static,
+    {
+        self.inner_builder.before_stop(f);
+        self
+    }
+
+    pub fn after_start<F>(&mut self, f: F) -> &mut Self
+    where
+        F: Fn() + Send + Sync + 'static,
+    {
+        self.inner_builder.after_start(f);
+        self
+    }
+
+    pub fn build(&mut self) -> super::FuturePool {
+        let name = if let Some(name) = &self.name_prefix {
+            name.as_str()
+        } else {
+            "future_pool"
+        };
+        let env = Arc::new(super::Env {
+            on_tick: self.on_tick.take(),
+            metrics_running_task_count: FUTUREPOOL_RUNNING_TASK_VEC.with_label_values(&[name]),
+            metrics_handled_task_count: FUTUREPOOL_HANDLED_TASK_VEC.with_label_values(&[name]),
+        });
+        let pool = Arc::new(self.inner_builder.build());
+        super::FuturePool { pool, env }
+    }
+}

components/tikv_util/src/future_pool/metrics.rs

@@ -0,0 +1,18 @@
+// Copyright 2019 TiKV Project Authors. Licensed under Apache-2.0.
+
+use prometheus::*;
+
+lazy_static! {
+    pub static ref FUTUREPOOL_RUNNING_TASK_VEC: IntGaugeVec = register_int_gauge_vec!(
+        "tikv_futurepool_pending_task_total",
+        "Current future_pool pending + running tasks.",
+        &["name"]
+    )
+    .unwrap();
+    pub static ref FUTUREPOOL_HANDLED_TASK_VEC: IntCounterVec = register_int_counter_vec!(
+        "tikv_futurepool_handled_task_total",
+        "Total number of future_pool handled tasks.",
+        &["name"]
+    )
+    .unwrap();
+}