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Better concurrency:

Browse source 
Use Notify instead of stupid sleep in background worker
Use Semaphore to limit concurrent requests in rpc_client
Make more background tasks cancellable
This commit is contained in:
Alex 2020-04-22 16:51:52 +00:00
parent c0335ac690
commit e8214cb180
10 changed files with 153 additions and 120 deletions
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171
Cargo.lock generated
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@ -10,7 +10,7 @@ dependencies = [
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"checksum unicode-segmentation 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e83e153d1053cbb5a118eeff7fd5be06ed99153f00dbcd8ae310c5fb2b22edc0" "checksum unicode-segmentation 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e83e153d1053cbb5a118eeff7fd5be06ed99153f00dbcd8ae310c5fb2b22edc0"
"checksum unicode-width 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "caaa9d531767d1ff2150b9332433f32a24622147e5ebb1f26409d5da67afd479" "checksum unicode-width 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "caaa9d531767d1ff2150b9332433f32a24622147e5ebb1f26409d5da67afd479"
"checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c" "checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"

9
src/background.rs
View file

@ -3,9 +3,8 @@ use std::pin::Pin;
use futures::future::join_all; use futures::future::join_all;
use std::sync::Arc; use std::sync::Arc;
use std::time::Duration;
use tokio::sync::Mutex; use tokio::sync::Mutex;
use tokio::sync::{mpsc, watch}; use tokio::sync::{mpsc, watch, Notify};
use crate::error::Error; use crate::error::Error;
@ -18,6 +17,7 @@ pub struct BackgroundRunner {
queue_in: mpsc::UnboundedSender<(Job, bool)>, queue_in: mpsc::UnboundedSender<(Job, bool)>,
queue_out: Mutex<mpsc::UnboundedReceiver<(Job, bool)>>, queue_out: Mutex<mpsc::UnboundedReceiver<(Job, bool)>>,
job_notify: Notify,
workers: Mutex<Vec<tokio::task::JoinHandle<()>>>, workers: Mutex<Vec<tokio::task::JoinHandle<()>>>,
} }
@ -30,6 +30,7 @@ impl BackgroundRunner {
stop_signal, stop_signal,
queue_in, queue_in,
queue_out: Mutex::new(queue_out), queue_out: Mutex::new(queue_out),
job_notify: Notify::new(),
workers: Mutex::new(Vec::new()), workers: Mutex::new(Vec::new()),
}) })
} }
@ -58,6 +59,7 @@ impl BackgroundRunner {
{ {
let boxed: Job = Box::pin(job); let boxed: Job = Box::pin(job);
let _: Result<_, _> = self.queue_in.clone().send((boxed, false)); let _: Result<_, _> = self.queue_in.clone().send((boxed, false));
self.job_notify.notify();
} }
pub fn spawn_cancellable<T>(&self, job: T) pub fn spawn_cancellable<T>(&self, job: T)
@ -66,6 +68,7 @@ impl BackgroundRunner {
{ {
let boxed: Job = Box::pin(job); let boxed: Job = Box::pin(job);
let _: Result<_, _> = self.queue_in.clone().send((boxed, true)); let _: Result<_, _> = self.queue_in.clone().send((boxed, true));
self.job_notify.notify();
} }
pub async fn spawn_worker<F, T>(&self, name: String, worker: F) pub async fn spawn_worker<F, T>(&self, name: String, worker: F)
@ -97,7 +100,7 @@ impl BackgroundRunner {
info!("Background runner {} exiting", i); info!("Background runner {} exiting", i);
return; return;
} }
tokio::time::delay_for(Duration::from_secs(1)).await; self.job_notify.notified().await;
} }
} }
} }

2
src/main.rs
View file

@ -238,7 +238,7 @@ async fn main() {
}; };
let rpc_http_cli = let rpc_http_cli =
Arc::new(RpcHttpClient::new(&tls_config).expect("Could not create RPC client")); Arc::new(RpcHttpClient::new(8, &tls_config).expect("Could not create RPC client"));
let membership_rpc_cli = let membership_rpc_cli =
RpcAddrClient::new(rpc_http_cli.clone(), MEMBERSHIP_RPC_PATH.to_string()); RpcAddrClient::new(rpc_http_cli.clone(), MEMBERSHIP_RPC_PATH.to_string());
let admin_rpc_cli = RpcAddrClient::new(rpc_http_cli.clone(), ADMIN_RPC_PATH.to_string()); let admin_rpc_cli = RpcAddrClient::new(rpc_http_cli.clone(), ADMIN_RPC_PATH.to_string());

6
src/membership.rs
View file

@ -296,8 +296,10 @@ impl System {
ring.rebuild_ring(); ring.rebuild_ring();
let (update_ring, ring) = watch::channel(Arc::new(ring)); let (update_ring, ring) = watch::channel(Arc::new(ring));
let rpc_http_client = let rpc_http_client = Arc::new(
Arc::new(RpcHttpClient::new(&config.rpc_tls).expect("Could not create RPC client")); RpcHttpClient::new(config.max_concurrent_requests, &config.rpc_tls)
.expect("Could not create RPC client"),
);
let rpc_path = MEMBERSHIP_RPC_PATH.to_string(); let rpc_path = MEMBERSHIP_RPC_PATH.to_string();
let rpc_client = RpcClient::new( let rpc_client = RpcClient::new(

54
src/rpc_client.rs
View file

@ -10,7 +10,7 @@ use futures::stream::StreamExt;
use futures_util::future::FutureExt; use futures_util::future::FutureExt;
use hyper::client::{Client, HttpConnector}; use hyper::client::{Client, HttpConnector};
use hyper::{Body, Method, Request}; use hyper::{Body, Method, Request};
use tokio::sync::watch; use tokio::sync::{watch, Semaphore};
use crate::background::BackgroundRunner; use crate::background::BackgroundRunner;
use crate::data::*; use crate::data::*;
@ -117,7 +117,7 @@ impl<M: RpcMessage + 'static> RpcClient<M> {
if results.len() >= stop_after { if results.len() >= stop_after {
// Continue requests in background // Continue requests in background
// TODO: make this optionnal (only usefull for write requests) // TODO: make this optionnal (only usefull for write requests)
self.clone().background.spawn(async move { self.clone().background.spawn_cancellable(async move {
resp_stream.collect::<Vec<_>>().await; resp_stream.collect::<Vec<_>>().await;
Ok(()) Ok(())
}); });
@ -164,14 +164,22 @@ impl<M: RpcMessage> RpcAddrClient<M> {
} }
} }
pub enum RpcHttpClient { pub struct RpcHttpClient {
request_limiter: Semaphore,
method: ClientMethod,
}
enum ClientMethod {
HTTP(Client<HttpConnector, hyper::Body>), HTTP(Client<HttpConnector, hyper::Body>),
HTTPS(Client<tls_util::HttpsConnectorFixedDnsname<HttpConnector>, hyper::Body>), HTTPS(Client<tls_util::HttpsConnectorFixedDnsname<HttpConnector>, hyper::Body>),
} }
impl RpcHttpClient { impl RpcHttpClient {
pub fn new(tls_config: &Option<TlsConfig>) -> Result<Self, Error> { pub fn new(
if let Some(cf) = tls_config { max_concurrent_requests: usize,
tls_config: &Option<TlsConfig>,
) -> Result<Self, Error> {
let method = if let Some(cf) = tls_config {
let ca_certs = tls_util::load_certs(&cf.ca_cert)?; let ca_certs = tls_util::load_certs(&cf.ca_cert)?;
let node_certs = tls_util::load_certs(&cf.node_cert)?; let node_certs = tls_util::load_certs(&cf.node_cert)?;
let node_key = tls_util::load_private_key(&cf.node_key)?; let node_key = tls_util::load_private_key(&cf.node_key)?;
@ -187,10 +195,14 @@ impl RpcHttpClient {
let connector = let connector =
tls_util::HttpsConnectorFixedDnsname::<HttpConnector>::new(config, "garage"); tls_util::HttpsConnectorFixedDnsname::<HttpConnector>::new(config, "garage");
Ok(RpcHttpClient::HTTPS(Client::builder().build(connector))) ClientMethod::HTTPS(Client::builder().build(connector))
} else { } else {
Ok(RpcHttpClient::HTTP(Client::new())) ClientMethod::HTTP(Client::new())
} };
Ok(RpcHttpClient {
method,
request_limiter: Semaphore::new(max_concurrent_requests),
})
} }
async fn call<M, MB>( async fn call<M, MB>(
@ -204,9 +216,9 @@ impl RpcHttpClient {
MB: Borrow<M>, MB: Borrow<M>,
M: RpcMessage, M: RpcMessage,
{ {
let uri = match self { let uri = match self.method {
RpcHttpClient::HTTP(_) => format!("http://{}/{}", to_addr, path), ClientMethod::HTTP(_) => format!("http://{}/{}", to_addr, path),
RpcHttpClient::HTTPS(_) => format!("https://{}/{}", to_addr, path), ClientMethod::HTTPS(_) => format!("https://{}/{}", to_addr, path),
}; };
let req = Request::builder() let req = Request::builder()
@ -214,12 +226,22 @@ impl RpcHttpClient {
.uri(uri) .uri(uri)
.body(Body::from(rmp_to_vec_all_named(msg.borrow())?))?; .body(Body::from(rmp_to_vec_all_named(msg.borrow())?))?;
let resp_fut = match self { let resp_fut = match &self.method {
RpcHttpClient::HTTP(client) => client.request(req).fuse(), ClientMethod::HTTP(client) => client.request(req).fuse(),
RpcHttpClient::HTTPS(client) => client.request(req).fuse(), ClientMethod::HTTPS(client) => client.request(req).fuse(),
}; };
let slot = self.request_limiter.acquire().await;
let resp = tokio::time::timeout(timeout, resp_fut) let resp = tokio::time::timeout(timeout, resp_fut)
.await? .await
.map_err(|e| {
debug!(
"RPC timeout to {}: {}",
to_addr,
debug_serialize(msg.borrow())
);
e
})?
.map_err(|e| { .map_err(|e| {
warn!( warn!(
"RPC HTTP client error when connecting to {}: {}", "RPC HTTP client error when connecting to {}: {}",
@ -227,6 +249,7 @@ impl RpcHttpClient {
); );
e e
})?; })?;
drop(slot);
let status = resp.status(); let status = resp.status();
let body = hyper::body::to_bytes(resp.into_body()).await?; let body = hyper::body::to_bytes(resp.into_body()).await?;
@ -240,3 +263,4 @@ impl RpcHttpClient {
} }
} }
} }

7
src/rpc_server.rs
View file

@ -52,9 +52,10 @@ where
Ok(resp) => { Ok(resp) => {
let resp_bytes = rmp_to_vec_all_named::<Result<M, String>>(&Ok(resp))?; let resp_bytes = rmp_to_vec_all_named::<Result<M, String>>(&Ok(resp))?;
trace!( trace!(
"]RPC:{},ok ({} ms)", "]RPC:{},ok ({} ms), request: {}",
name, name,
(Instant::now() - begin_time).as_millis() (Instant::now() - begin_time).as_millis(),
req_str,
); );
Ok(Response::new(Body::from(resp_bytes))) Ok(Response::new(Body::from(resp_bytes)))
} }
@ -68,7 +69,7 @@ where
name, name,
e, e,
(Instant::now() - begin_time).as_millis(), (Instant::now() - begin_time).as_millis(),
req_str req_str,
); );
Ok(err_response) Ok(err_response)
} }

6
src/server.rs
View file

@ -35,6 +35,9 @@ pub struct Config {
pub bootstrap_peers: Vec<SocketAddr>, pub bootstrap_peers: Vec<SocketAddr>,
#[serde(default = "default_max_concurrent_requests")]
pub max_concurrent_requests: usize,
#[serde(default = "default_block_size")] #[serde(default = "default_block_size")]
pub block_size: usize, pub block_size: usize,
@ -50,6 +53,9 @@ pub struct Config {
pub rpc_tls: Option<TlsConfig>, pub rpc_tls: Option<TlsConfig>,
} }
fn default_max_concurrent_requests() -> usize {
12
}
fn default_block_size() -> usize { fn default_block_size() -> usize {
1048576 1048576
} }

10
src/table.rs
View file

@ -269,7 +269,7 @@ where
let ent2 = ret_entry.clone(); let ent2 = ret_entry.clone();
self.system self.system
.background .background
.spawn(async move { self2.repair_on_read(&who[..], ent2).await }); .spawn_cancellable(async move { self2.repair_on_read(&who[..], ent2).await });
} }
} }
Ok(ret) Ok(ret)
@ -324,7 +324,7 @@ where
} }
if !to_repair.is_empty() { if !to_repair.is_empty() {
let self2 = self.clone(); let self2 = self.clone();
self.system.background.spawn(async move { self.system.background.spawn_cancellable(async move {
for (_, v) in to_repair.iter_mut() { for (_, v) in to_repair.iter_mut() {
self2.repair_on_read(&who[..], v.take().unwrap()).await?; self2.repair_on_read(&who[..], v.take().unwrap()).await?;
} }
@ -472,7 +472,7 @@ where
self.instance.updated(old_entry, Some(new_entry)).await?; self.instance.updated(old_entry, Some(new_entry)).await?;
self.system self.system
.background .background
.spawn(syncer.clone().invalidate(tree_key)); .spawn_cancellable(syncer.clone().invalidate(tree_key));
} }
} }
@ -480,7 +480,7 @@ where
let self2 = self.clone(); let self2 = self.clone();
self.system self.system
.background .background
.spawn(async move { self2.insert_many(&epidemic_propagate[..]).await }); .spawn_cancellable(async move { self2.insert_many(&epidemic_propagate[..]).await });
} }
Ok(()) Ok(())
@ -500,7 +500,7 @@ where
self.instance.updated(Some(old_entry), None).await?; self.instance.updated(Some(old_entry), None).await?;
self.system self.system
.background .background
.spawn(syncer.clone().invalidate(key.to_vec())); .spawn_cancellable(syncer.clone().invalidate(key.to_vec()));
count += 1; count += 1;
} }
} }

3
src/table_sync.rs
View file

@ -132,10 +132,9 @@ where
.await; .await;
let s3 = syncer.clone(); let s3 = syncer.clone();
table.system.background.spawn(async move { tokio::spawn(async move {
tokio::time::delay_for(Duration::from_secs(20)).await; tokio::time::delay_for(Duration::from_secs(20)).await;
s3.add_full_scan().await; s3.add_full_scan().await;
Ok(())
}); });
syncer syncer

5
test_write.sh
View file

@ -1,8 +1,7 @@
#!/bin/bash #!/bin/bash
for FILE in $(find target/debug/deps); do for FILE in $(find target/debug/deps); do
echo echo -n "$FILE "
echo $FILE curl localhost:3900/$FILE -X PUT -H 'Host: garage' -H 'Content-Type: application/blob' --data-binary "@$FILE" || echo "ERROR"
curl -v localhost:3900/$FILE -X PUT -H 'Host: garage' -H 'Content-Type: application/blob' --data-binary "@$FILE"
done done