526 lines
18 KiB
Rust
526 lines
18 KiB
Rust
// SPDX-FileCopyrightText: Copyright (c) 2026 The SGLang Authors
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
|
|
use super::*;
|
|
use crate::common::mock_worker::MockWorker;
|
|
use futures::future::BoxFuture;
|
|
use sgl_router::buckets_reorg::{Bucket, BucketGroups, BucketResolver, EngineGroup};
|
|
use sgl_router::policies::PolicyRegistry;
|
|
use sgl_router::policies_reorg::admission::{AllowAll, Decision, EngineAdmission};
|
|
use sgl_router::policies_reorg::{Pick, PickError, PickRequest, Policy, Rejection, Stage};
|
|
use sgl_router::server::app_context::ChatRouting;
|
|
use sgl_router::state::load_monitor::engine_reported_load::EngineReportedWorkerLoad;
|
|
use std::sync::Mutex;
|
|
|
|
mod session_aware;
|
|
|
|
type PickCall = (String, Stage, u64, Option<u64>);
|
|
|
|
#[derive(Debug)]
|
|
struct FirstPolicy {
|
|
calls: Mutex<Vec<PickCall>>,
|
|
admission: Arc<dyn EngineAdmission>,
|
|
miss: bool,
|
|
invalid: bool,
|
|
}
|
|
|
|
impl Default for FirstPolicy {
|
|
fn default() -> Self {
|
|
Self {
|
|
admission: Arc::new(AllowAll),
|
|
miss: false,
|
|
invalid: false,
|
|
calls: Mutex::new(Vec::new()),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Policy for FirstPolicy {
|
|
fn pick<'a>(
|
|
&'a self,
|
|
engines: &'a [Arc<Worker>],
|
|
request: &'a PickRequest<'a>,
|
|
) -> BoxFuture<'a, Result<Pick, PickError>> {
|
|
Box::pin(async move {
|
|
self.calls.lock().unwrap().push((
|
|
request.bucket.to_owned(),
|
|
request.stage,
|
|
request.input_tokens,
|
|
request.expected_peak_tokens,
|
|
));
|
|
if self.invalid {
|
|
return Err(PickError::InvalidSignal("invalid policy input".into()));
|
|
}
|
|
if self.miss {
|
|
return Err(PickError::NoCandidates);
|
|
}
|
|
if engines.is_empty() {
|
|
return Err(PickError::NoCandidates);
|
|
}
|
|
let engine = engines[0].clone();
|
|
if let Decision::Reject(reason) = self.admission.check(&engine, request, None)? {
|
|
return Err(PickError::AdmissionRejected(Rejection {
|
|
engine: engine.id.clone(),
|
|
reason,
|
|
}));
|
|
}
|
|
Ok(Pick {
|
|
engine,
|
|
reason: "test",
|
|
})
|
|
})
|
|
}
|
|
}
|
|
|
|
#[derive(Debug)]
|
|
struct RejectAll;
|
|
|
|
impl EngineAdmission for RejectAll {
|
|
fn check(
|
|
&self,
|
|
_: &Worker,
|
|
_: &PickRequest<'_>,
|
|
_: Option<&EngineReportedWorkerLoad>,
|
|
) -> Result<Decision, PickError> {
|
|
Ok(Decision::Reject("full".into()))
|
|
}
|
|
}
|
|
|
|
fn rejecting_policy() -> Arc<FirstPolicy> {
|
|
Arc::new(FirstPolicy {
|
|
admission: Arc::new(RejectAll),
|
|
..Default::default()
|
|
})
|
|
}
|
|
|
|
fn group(id: &str, policy: Arc<FirstPolicy>) -> EngineGroup {
|
|
EngineGroup {
|
|
worker_ids: Some([WorkerId(id.into())].into_iter().collect()),
|
|
policy,
|
|
}
|
|
}
|
|
|
|
fn context(workers: &[(&str, Stage, &MockWorker)], buckets: Vec<Bucket>) -> Arc<AppContext> {
|
|
let config = config_for("");
|
|
let registry = Arc::new(WorkerRegistry::default());
|
|
for &(id, mode, worker) in workers {
|
|
registry
|
|
.add(WorkerSpec {
|
|
id: WorkerId(id.into()),
|
|
url: worker.url.clone(),
|
|
mode,
|
|
model_ids: vec![ModelId("tiny".into())],
|
|
bootstrap_port: Some(8998),
|
|
})
|
|
.unwrap();
|
|
}
|
|
let tokenizers = Arc::new(TokenizerRegistry::load_from_config(&config).unwrap());
|
|
let mut ctx = AppContext::new(
|
|
config,
|
|
tokenizers,
|
|
Arc::new(Proxy::new(TEST_TIMEOUT).unwrap()),
|
|
registry,
|
|
// The reorg route must not require the legacy policy registry.
|
|
Arc::new(PolicyRegistry::default()),
|
|
);
|
|
ctx.chat_routing = ChatRouting::Reorg(
|
|
[(ModelId("tiny".into()), BucketResolver::new(buckets))]
|
|
.into_iter()
|
|
.collect(),
|
|
);
|
|
Arc::new(ctx)
|
|
}
|
|
|
|
fn request(value: serde_json::Value) -> Request<Body> {
|
|
Request::builder()
|
|
.method("POST")
|
|
.uri("/v1/chat/completions")
|
|
.header("content-type", "application/json")
|
|
.body(Body::from(serde_json::to_vec(&value).unwrap()))
|
|
.unwrap()
|
|
}
|
|
|
|
fn body(content: &str) -> serde_json::Value {
|
|
serde_json::json!({"model": "tiny", "messages": [{"role": "user", "content": content}]})
|
|
}
|
|
|
|
#[tokio::test]
|
|
async fn length_selects_plain_bucket_before_engine_selection() {
|
|
let short_worker = MockWorker::start(vec![]).await;
|
|
let long_worker = MockWorker::start(vec![]).await;
|
|
let policy = Arc::new(FirstPolicy::default());
|
|
let mut short = Bucket::new("short", BucketGroups::Plain(group("short", policy.clone())));
|
|
short.limits.max = Some(4);
|
|
let long = Bucket::new("long", BucketGroups::Plain(group("long", policy.clone())));
|
|
let ctx = context(
|
|
&[
|
|
("short", Stage::Plain, &short_worker),
|
|
("long", Stage::Plain, &long_worker),
|
|
],
|
|
vec![long, short],
|
|
);
|
|
let app = build_router(ctx);
|
|
let response = app.clone().oneshot(request(body("hi"))).await.unwrap();
|
|
assert_eq!(response.status(), StatusCode::OK);
|
|
let _ = response.into_body().collect().await.unwrap();
|
|
assert!(short_worker.captured.lock().unwrap().last_body.is_some());
|
|
assert!(long_worker.captured.lock().unwrap().last_body.is_none());
|
|
|
|
let response = app
|
|
.oneshot(request(body(&"hello ".repeat(30))))
|
|
.await
|
|
.unwrap();
|
|
assert_eq!(response.status(), StatusCode::OK);
|
|
let _ = response.into_body().collect().await.unwrap();
|
|
assert!(long_worker.captured.lock().unwrap().last_body.is_some());
|
|
let calls = policy.calls.lock().unwrap();
|
|
assert_eq!(calls.len(), 2);
|
|
assert_eq!((&*calls[0].0, calls[0].1), ("short", Stage::Plain));
|
|
assert_eq!((&*calls[1].0, calls[1].1), ("long", Stage::Plain));
|
|
}
|
|
|
|
#[tokio::test]
|
|
async fn pd_picks_both_groups_from_selected_bucket_and_shares_bootstrap() {
|
|
let prefill = MockWorker::start(vec![]).await;
|
|
let decode = MockWorker::start(vec![]).await;
|
|
let policy = Arc::new(FirstPolicy::default());
|
|
let mut selected = Bucket::new(
|
|
"selected",
|
|
BucketGroups::Pd {
|
|
prefill: group("p", policy.clone()),
|
|
decode: group("d", policy.clone()),
|
|
},
|
|
);
|
|
selected.limits.max = Some(100);
|
|
let other_policy = Arc::new(FirstPolicy::default());
|
|
let other = Bucket::new(
|
|
"other",
|
|
BucketGroups::Pd {
|
|
prefill: group("p", other_policy.clone()),
|
|
decode: group("d", other_policy.clone()),
|
|
},
|
|
);
|
|
let ctx = context(
|
|
&[
|
|
("p", Stage::Prefill, &prefill),
|
|
("d", Stage::Decode, &decode),
|
|
],
|
|
vec![other, selected],
|
|
);
|
|
let mut body = body("hello");
|
|
body["max_completion_tokens"] = 10.into();
|
|
let response = build_router(ctx).oneshot(request(body)).await.unwrap();
|
|
assert_eq!(response.status(), StatusCode::OK);
|
|
assert_eq!(response.headers()["x-sgl-decode-url"], decode.url);
|
|
let _ = response.into_body().collect().await.unwrap();
|
|
tokio::time::timeout(TEST_TIMEOUT, async {
|
|
while prefill.captured.lock().unwrap().last_body.is_none() {
|
|
tokio::task::yield_now().await;
|
|
}
|
|
})
|
|
.await
|
|
.unwrap();
|
|
let p: serde_json::Value =
|
|
serde_json::from_slice(prefill.captured.lock().unwrap().last_body.as_ref().unwrap())
|
|
.unwrap();
|
|
let d: serde_json::Value =
|
|
serde_json::from_slice(decode.captured.lock().unwrap().last_body.as_ref().unwrap())
|
|
.unwrap();
|
|
assert!(p["bootstrap_room"].is_number());
|
|
assert_eq!(p["bootstrap_room"], d["bootstrap_room"]);
|
|
let calls = policy.calls.lock().unwrap();
|
|
assert_eq!(calls.len(), 2);
|
|
assert_eq!((&*calls[0].0, calls[0].1), ("selected", Stage::Prefill));
|
|
assert_eq!((&*calls[1].0, calls[1].1), ("selected", Stage::Decode));
|
|
assert_eq!(calls[0].3, Some(calls[0].2 + 10));
|
|
assert_eq!(calls[1].3, calls[0].3);
|
|
assert!(other_policy.calls.lock().unwrap().is_empty());
|
|
}
|
|
|
|
#[tokio::test]
|
|
async fn missing_decode_in_all_buckets_does_not_dispatch_prefill() {
|
|
let prefill = MockWorker::start(vec![]).await;
|
|
let decode = MockWorker::start(vec![]).await;
|
|
let policy = Arc::new(FirstPolicy::default());
|
|
let mut selected = Bucket::new(
|
|
"selected",
|
|
BucketGroups::Pd {
|
|
prefill: group("p", policy.clone()),
|
|
decode: group("missing", policy.clone()),
|
|
},
|
|
);
|
|
selected.limits.max = Some(100);
|
|
let other = Bucket::new(
|
|
"other",
|
|
BucketGroups::Pd {
|
|
prefill: group("p", policy.clone()),
|
|
decode: group("also-missing", policy.clone()),
|
|
},
|
|
);
|
|
let ctx = context(
|
|
&[
|
|
("p", Stage::Prefill, &prefill),
|
|
("d", Stage::Decode, &decode),
|
|
],
|
|
vec![other, selected],
|
|
);
|
|
let response = build_router(ctx.clone())
|
|
.oneshot(request(body("hi")))
|
|
.await
|
|
.unwrap();
|
|
assert_eq!(response.status(), StatusCode::SERVICE_UNAVAILABLE);
|
|
assert_eq!(
|
|
response.headers()["x-router-error-code"],
|
|
"no_decode_workers_available"
|
|
);
|
|
assert!(prefill.captured.lock().unwrap().last_body.is_none());
|
|
assert!(decode.captured.lock().unwrap().last_body.is_none());
|
|
assert_eq!(policy.calls.lock().unwrap().len(), 2);
|
|
assert_eq!(ctx.router_inflight_load.inflight_count(), 0);
|
|
assert_eq!(
|
|
ctx.registry
|
|
.get(&WorkerId("p".into()))
|
|
.unwrap()
|
|
.router_inflight_load(),
|
|
0
|
|
);
|
|
}
|
|
|
|
#[tokio::test]
|
|
async fn rejects_unsupported_length_unknown_model_and_overflow_before_policy() {
|
|
let worker = MockWorker::start(vec![]).await;
|
|
let policy = Arc::new(FirstPolicy::default());
|
|
let mut bucket = Bucket::new("short", BucketGroups::Plain(group("w", policy.clone())));
|
|
bucket.max_context_tokens = Some(4);
|
|
let app = build_router(context(&[("w", Stage::Plain, &worker)], vec![bucket]));
|
|
let mut long = body("hi");
|
|
long["max_tokens"] = 100.into();
|
|
let mut overflow = body("hi");
|
|
overflow["max_tokens"] = u64::MAX.into();
|
|
let mut unknown = body("hi");
|
|
unknown["model"] = "unknown".into();
|
|
for (body, status) in [
|
|
(long, StatusCode::BAD_REQUEST),
|
|
(overflow, StatusCode::BAD_REQUEST),
|
|
(unknown, StatusCode::NOT_FOUND),
|
|
(serde_json::json!({}), StatusCode::BAD_REQUEST),
|
|
] {
|
|
let response = app.clone().oneshot(request(body)).await.unwrap();
|
|
assert_eq!(response.status(), status);
|
|
}
|
|
assert!(policy.calls.lock().unwrap().is_empty());
|
|
assert!(worker.captured.lock().unwrap().last_body.is_none());
|
|
}
|
|
|
|
#[tokio::test]
|
|
async fn streaming_uses_existing_forwarder() {
|
|
let worker = MockWorker::start(vec!["data: {\"choices\":[]}\n\n", "data: [DONE]\n\n"]).await;
|
|
let policy = Arc::new(FirstPolicy::default());
|
|
let bucket = Bucket::new("plain", BucketGroups::Plain(group("w", policy)));
|
|
let app = build_router(context(&[("w", Stage::Plain, &worker)], vec![bucket]));
|
|
let mut body = body("hi");
|
|
body["stream"] = true.into();
|
|
let response = app.oneshot(request(body)).await.unwrap();
|
|
assert_eq!(response.status(), StatusCode::OK);
|
|
assert!(response.headers()["content-type"]
|
|
.to_str()
|
|
.unwrap()
|
|
.starts_with("text/event-stream"));
|
|
let bytes = response.into_body().collect().await.unwrap().to_bytes();
|
|
assert!(String::from_utf8_lossy(&bytes).contains("data: [DONE]"));
|
|
}
|
|
|
|
#[tokio::test]
|
|
async fn reorg_route_keeps_chat_body_limit() {
|
|
let app = build_router(context(&[], vec![]));
|
|
let request = Request::builder()
|
|
.method("POST")
|
|
.uri("/v1/chat/completions")
|
|
.header("content-type", "application/json")
|
|
.body(Body::from(vec![b' '; MAX_CHAT_BODY_BYTES + 1]))
|
|
.unwrap();
|
|
assert_eq!(
|
|
app.oneshot(request).await.unwrap().status(),
|
|
StatusCode::PAYLOAD_TOO_LARGE
|
|
);
|
|
}
|
|
|
|
#[tokio::test]
|
|
async fn plain_fallback_skips_empty_missed_and_rejected_buckets_then_stops_on_success() {
|
|
let rejected_worker = MockWorker::start(vec![]).await;
|
|
let winner = MockWorker::start(vec![]).await;
|
|
let skipped = Arc::new(FirstPolicy::default());
|
|
let rejected = rejecting_policy();
|
|
let missed = Arc::new(FirstPolicy {
|
|
miss: true,
|
|
..Default::default()
|
|
});
|
|
let accepted = Arc::new(FirstPolicy::default());
|
|
let buckets = vec![
|
|
Bucket::new(
|
|
"a-empty",
|
|
BucketGroups::Plain(group("missing", skipped.clone())),
|
|
),
|
|
Bucket::new(
|
|
"b-miss",
|
|
BucketGroups::Plain(group("rejected", missed.clone())),
|
|
),
|
|
Bucket::new(
|
|
"c-rejected",
|
|
BucketGroups::Plain(group("rejected", rejected.clone())),
|
|
),
|
|
Bucket::new(
|
|
"d-winner",
|
|
BucketGroups::Plain(group("winner", accepted.clone())),
|
|
),
|
|
Bucket::new(
|
|
"e-unused",
|
|
BucketGroups::Plain(group("winner", skipped.clone())),
|
|
),
|
|
];
|
|
let ctx = context(
|
|
&[
|
|
("rejected", Stage::Plain, &rejected_worker),
|
|
("winner", Stage::Plain, &winner),
|
|
],
|
|
buckets,
|
|
);
|
|
let response = build_router(ctx)
|
|
.oneshot(request(body("hi")))
|
|
.await
|
|
.unwrap();
|
|
assert_eq!(response.status(), StatusCode::OK);
|
|
let _ = response.into_body().collect().await.unwrap();
|
|
assert!(rejected_worker.captured.lock().unwrap().last_body.is_none());
|
|
assert!(winner.captured.lock().unwrap().last_body.is_some());
|
|
assert!(skipped.calls.lock().unwrap().is_empty());
|
|
assert_eq!(missed.calls.lock().unwrap().len(), 1);
|
|
assert_eq!(rejected.calls.lock().unwrap().len(), 1);
|
|
assert_eq!(accepted.calls.lock().unwrap()[0].0, "d-winner");
|
|
}
|
|
|
|
#[tokio::test]
|
|
async fn decode_failure_retries_both_groups_in_next_bucket_without_dispatching_first_prefill() {
|
|
// Cover an empty decode group and rejection of a selected decode engine.
|
|
for reject_decode in [false, true] {
|
|
let first_prefill = MockWorker::start(vec![]).await;
|
|
let second_prefill = MockWorker::start(vec![]).await;
|
|
let decode = MockWorker::start(vec![]).await;
|
|
let first = Arc::new(FirstPolicy::default());
|
|
let rejected = rejecting_policy();
|
|
let accepted = Arc::new(FirstPolicy::default());
|
|
let buckets = vec![
|
|
Bucket::new(
|
|
"a-first",
|
|
BucketGroups::Pd {
|
|
prefill: group("p1", first.clone()),
|
|
decode: group(if reject_decode { "d" } else { "missing" }, rejected),
|
|
},
|
|
),
|
|
Bucket::new(
|
|
"b-second",
|
|
BucketGroups::Pd {
|
|
prefill: group("p2", accepted.clone()),
|
|
decode: group("d", accepted.clone()),
|
|
},
|
|
),
|
|
];
|
|
let ctx = context(
|
|
&[
|
|
("p1", Stage::Prefill, &first_prefill),
|
|
("p2", Stage::Prefill, &second_prefill),
|
|
("d", Stage::Decode, &decode),
|
|
],
|
|
buckets,
|
|
);
|
|
let response = build_router(ctx.clone())
|
|
.oneshot(request(body("hi")))
|
|
.await
|
|
.unwrap();
|
|
assert_eq!(response.status(), StatusCode::OK);
|
|
let _ = response.into_body().collect().await.unwrap();
|
|
tokio::time::timeout(TEST_TIMEOUT, async {
|
|
while second_prefill.captured.lock().unwrap().last_body.is_none() {
|
|
tokio::task::yield_now().await;
|
|
}
|
|
})
|
|
.await
|
|
.unwrap();
|
|
assert!(first_prefill.captured.lock().unwrap().last_body.is_none());
|
|
assert!(decode.captured.lock().unwrap().last_body.is_some());
|
|
assert_eq!(
|
|
ctx.registry
|
|
.get(&WorkerId("p1".into()))
|
|
.unwrap()
|
|
.router_inflight_load(),
|
|
0
|
|
);
|
|
assert_eq!(first.calls.lock().unwrap().len(), 1);
|
|
let calls = accepted.calls.lock().unwrap();
|
|
assert_eq!(calls.len(), 2);
|
|
assert_eq!((&*calls[0].0, calls[0].1), ("b-second", Stage::Prefill));
|
|
assert_eq!((&*calls[1].0, calls[1].1), ("b-second", Stage::Decode));
|
|
}
|
|
}
|
|
|
|
#[tokio::test]
|
|
async fn admission_exhaustion_is_preserved_when_later_buckets_are_empty() {
|
|
let worker = MockWorker::start(vec![]).await;
|
|
let first = rejecting_policy();
|
|
let second = rejecting_policy();
|
|
let empty = Arc::new(FirstPolicy::default());
|
|
let ctx = context(
|
|
&[("w", Stage::Plain, &worker)],
|
|
vec![
|
|
Bucket::new("a-first", BucketGroups::Plain(group("w", first.clone()))),
|
|
Bucket::new("b-second", BucketGroups::Plain(group("w", second.clone()))),
|
|
Bucket::new(
|
|
"c-empty",
|
|
BucketGroups::Plain(group("missing", empty.clone())),
|
|
),
|
|
],
|
|
);
|
|
let response = build_router(ctx.clone())
|
|
.oneshot(request(body("hi")))
|
|
.await
|
|
.unwrap();
|
|
assert_eq!(response.status(), StatusCode::SERVICE_UNAVAILABLE);
|
|
assert_eq!(
|
|
response.headers()["x-router-error-code"],
|
|
"policy_selection_failed"
|
|
);
|
|
assert_eq!(first.calls.lock().unwrap().len(), 1);
|
|
assert_eq!(second.calls.lock().unwrap().len(), 1);
|
|
assert!(empty.calls.lock().unwrap().is_empty());
|
|
assert!(worker.captured.lock().unwrap().last_body.is_none());
|
|
assert_eq!(ctx.router_inflight_load.inflight_count(), 0);
|
|
}
|
|
|
|
#[tokio::test]
|
|
async fn invalid_policy_signal_stops_bucket_iteration() {
|
|
let worker = MockWorker::start(vec![]).await;
|
|
let invalid = Arc::new(FirstPolicy {
|
|
invalid: true,
|
|
..Default::default()
|
|
});
|
|
let later = Arc::new(FirstPolicy::default());
|
|
let ctx = context(
|
|
&[("w", Stage::Plain, &worker)],
|
|
vec![
|
|
Bucket::new(
|
|
"a-invalid",
|
|
BucketGroups::Plain(group("w", invalid.clone())),
|
|
),
|
|
Bucket::new("b-later", BucketGroups::Plain(group("w", later.clone()))),
|
|
],
|
|
);
|
|
let response = build_router(ctx)
|
|
.oneshot(request(body("hi")))
|
|
.await
|
|
.unwrap();
|
|
assert_eq!(response.status(), StatusCode::INTERNAL_SERVER_ERROR);
|
|
assert_eq!(invalid.calls.lock().unwrap().len(), 1);
|
|
assert!(later.calls.lock().unwrap().is_empty());
|
|
assert!(worker.captured.lock().unwrap().last_body.is_none());
|
|
}
|