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perf: 深度优化消息内存占用

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- 消息缓冲 Vec → VecDeque：原来溢出时 drain(0..n) 每条消息 O(n)
  搬移，高频消息下产生大量拷贝；环形缓冲均摊 O(1)，并按配置上限
  预分配避免反复扩容
- connection_id/topic/payload 改 Arc<str>：引擎侧主题驻留
  （10k 上限，超出整体重建），同主题数千条记录只存一份；
  消息列表每帧克隆最多 300 条用于渲染，payload 共享后零拷贝
- 单条 payload 历史保留上限 256KB（retained_payload，UTF-8
  边界安全截断），超大报文不再长期占据环形缓冲；消息行显示
  「已截断」徽章；发布记录改用实际发送字节（修 Base64/Hex
  历史内容与真实报文不一致的隐患）
- live 测试适配 Arc<str>；补截断边界单元测试（22 个 lib 测试 +
  2 个 live 测试通过）
This commit is contained in:
JoeAllen
2026-09-29 01:07:32 +08:00
parent 88a8652d7b
commit 96865c0588
5 changed files with 134 additions and 35 deletions
Download Patch File Download Diff File Expand all files Collapse all files
gpui-app/src/model.rs
+57 -3
View File
@@ -2,6 +2,8 @@
//!
//! 本层不依赖 GPUI，可被持久化层与 MQTT 引擎共用。
use std::sync::Arc;
use serde::{Deserialize, Serialize};
// ─── 连接配置 ────────────────────────────────────────────────────────────────
@@ -410,13 +412,17 @@ impl PayloadFormat {
/// 一条收到/发出的消息记录。payload 以 UTF-8 文本保存（非文本按 lossy 显示）。
///
/// 内存优化：`connection_id`/`topic` 用 `Arc<str>`——同一连接内主题高度重复，
/// 驻留后数千条记录只保留一份字符串。
#[derive(Debug, Clone)]
pub struct MqttRecord {
pub seq: u64,
pub connection_id: String,
pub connection_id: Arc<str>,
pub direction: Direction,
pub topic: String,
pub payload: String,
pub topic: Arc<str>,
/// Arc 共享：消息列表渲染每帧克隆最多数百条记录，零拷贝
pub payload: Arc<str>,
pub qos: u8,
pub retain: bool,
/// unix 毫秒
@@ -427,6 +433,29 @@ pub struct MqttRecord {
pub correlation_data: Option<String>,
pub message_expiry_interval: Option<u32>,
pub subscription_identifier: Option<u32>,
/// payload 超过 [`MAX_PAYLOAD_RETAIN`] 被截断
pub payload_truncated: bool,
}
/// 消息历史中单条 payload 的保留上限。超限截断，避免个别大报文
/// 长期占据历史缓冲（MQTTX 亦有类似限制）。
pub const MAX_PAYLOAD_RETAIN: usize = 256 * 1024;
/// 把原始 payload 字节转成用于历史记录的共享文本，超限截断。
/// 返回 (Arc<str>, 是否截断)。截断时回退到 UTF-8 字符边界。
pub fn retained_payload(raw: &[u8]) -> (Arc<str>, bool) {
if raw.len() <= MAX_PAYLOAD_RETAIN {
(Arc::from(String::from_utf8_lossy(raw).as_ref()), false)
} else {
let mut end = MAX_PAYLOAD_RETAIN;
while end > 0 && (raw[end] & 0xC0) == 0x80 {
end -= 1;
}
(
Arc::from(String::from_utf8_lossy(&raw[..end]).as_ref()),
true,
)
}
}
// ─── 发布参数 / 发布预设 ──────────────────────────────────────────────────────
@@ -863,4 +892,29 @@ mod tests {
// Subscription::new 同样产出默认启用的订阅
assert!(Subscription::new("c1", "t", 0).enabled);
}
// payload 截断：上限内不截断；超出时截断且不切坏 UTF-8 字符
#[test]
fn retained_payload_caps_and_preserves_utf8() {
let small = b"hello";
let (p, trunc) = retained_payload(small);
assert_eq!(&*p, "hello");
assert!(!trunc);
// 中文每字符 3 字节，让上限落在字符中间（256K 不是 3 的倍数）
let big: Vec<u8> = "中".repeat(MAX_PAYLOAD_RETAIN).into_bytes();
let (p, trunc) = retained_payload(&big);
assert!(trunc, "超过上限必须截断");
assert!(p.len() <= MAX_PAYLOAD_RETAIN);
assert_eq!(p.chars().last(), Some('中'), "不能切坏 UTF-8 字符");
assert!(
big.starts_with(p.as_bytes()),
"截断内容必须是原数据前缀"
);
// 恰好上限不截断
let exact = vec![b'a'; MAX_PAYLOAD_RETAIN];
let (_, trunc) = retained_payload(&exact);
assert!(!trunc);
}
}
gpui-app/src/mqtt.rs
+37 -11
View File
@@ -37,11 +37,11 @@ pub enum EngineEvent {
},
/// 收到消息
Message(MqttRecord),
/// 一条本地发出的消息（已成功交给客户端）
/// 一条本地发出的消息（已成功交给客户端）。payload 为实际发送的字节。
Published {
connection_id: String,
topic: String,
payload: String,
payload: Vec<u8>,
qos: u8,
retain: bool,
content_type: Option<String>,
@@ -77,6 +77,8 @@ struct ConnHandle {
pub struct MqttEngine {
runtime: tokio::runtime::Runtime,
conns: Mutex<HashMap<String, ConnHandle>>,
/// 主题/连接 ID 驻留缓存：同一连接内主题高度重复，驻留让消息记录共享字符串
topics: Mutex<HashMap<String, Arc<str>>>,
tx: EventSender,
seq: Arc<AtomicU64>,
}
@@ -96,6 +98,7 @@ impl MqttEngine {
Arc::new(Self {
runtime,
conns: Mutex::new(HashMap::new()),
topics: Mutex::new(HashMap::new()),
tx,
seq: Arc::new(AtomicU64::new(1)),
})
@@ -272,6 +275,8 @@ impl MqttEngine {
.raw_bytes
.clone()
.unwrap_or_else(|| params.payload.as_bytes().to_vec());
// 实际发送的字节留给 Published 事件（记录需要真实内容）
let sent_payload = payload.clone();
// v5 与 v4 两个 crate 各自定义 ClientError，统一归一化为 String。
let result: Result<(), String> = match &client {
ClientKind::V5(client) => {
@@ -318,7 +323,7 @@ impl MqttEngine {
engine.emit(EngineEvent::Published {
connection_id,
topic: params.topic,
payload: params.payload,
payload: sent_payload,
qos: params.qos,
retain: params.retain,
content_type: params.content_type,
@@ -490,6 +495,22 @@ impl MqttEngine {
rx
}
/// 驻留字符串（主题/连接 ID）：同一内容全进程只保留一份 `Arc<str>`。
/// 缓存有上限，异常流量下整体清空重建，避免无限增长。
pub(crate) fn intern(&self, s: &str) -> Arc<str> {
const INTERN_CAP: usize = 10_000;
let mut cache = self.topics.lock().unwrap();
if let Some(arc) = cache.get(s) {
return arc.clone();
}
if cache.len() >= INTERN_CAP {
cache.clear();
}
let arc: Arc<str> = Arc::from(s);
cache.insert(s.to_string(), arc.clone());
arc
}
pub fn test_connection(
self: &Arc<Self>,
cfg: ConnectionConfig,
@@ -942,14 +963,15 @@ async fn test_handshake(cfg_in: &ConnectionConfig) -> Result<(), String> {
// ─── 事件循环 ────────────────────────────────────────────────────────────────
fn v5_record(seq: u64, conn_id: &str, p: &V5Publish) -> MqttRecord {
fn v5_record(engine: &MqttEngine, seq: u64, conn_id: &str, p: &V5Publish) -> MqttRecord {
let props = p.properties.as_ref();
let (payload, payload_truncated) = crate::model::retained_payload(&p.payload);
MqttRecord {
seq,
connection_id: conn_id.to_string(),
connection_id: engine.intern(conn_id),
direction: Direction::Received,
topic: String::from_utf8_lossy(&p.topic).to_string(),
payload: String::from_utf8_lossy(&p.payload).to_string(),
topic: engine.intern(&String::from_utf8_lossy(&p.topic)),
payload,
qos: v5_qos_u8(p.qos),
retain: p.retain,
timestamp: now_ms(),
@@ -966,6 +988,7 @@ fn v5_record(seq: u64, conn_id: &str, p: &V5Publish) -> MqttRecord {
message_expiry_interval: props.and_then(|p| p.message_expiry_interval),
subscription_identifier: props
.and_then(|p| p.subscription_identifiers.first().map(|v| *v as u32)),
payload_truncated,
}
}
@@ -997,7 +1020,7 @@ fn spawn_v5_loop(
match event {
Ok(V5Event::Incoming(V5Packet::Publish(p))) => {
let topic = String::from_utf8_lossy(&p.topic).to_string();
let record = v5_record(engine.next_seq(), &id, &p);
let record = v5_record(&engine, engine.next_seq(), &id, &p);
engine.log(
&id,
LogLevel::Info,
@@ -1158,12 +1181,14 @@ fn spawn_v4_loop(
event = eventloop.poll() => {
match event {
Ok(rv4::Event::Incoming(rv4::Packet::Publish(p))) => {
let (payload, payload_truncated) =
crate::model::retained_payload(&p.payload);
let record = MqttRecord {
seq: engine.next_seq(),
connection_id: id.clone(),
connection_id: engine.intern(&id),
direction: Direction::Received,
topic: String::from_utf8_lossy(&p.topic).to_string(),
payload: String::from_utf8_lossy(&p.payload).to_string(),
topic: engine.intern(&String::from_utf8_lossy(&p.topic)),
payload,
qos: match p.qos {
rv4::QoS::AtMostOnce => 0,
rv4::QoS::AtLeastOnce => 1,
@@ -1177,6 +1202,7 @@ fn spawn_v4_loop(
correlation_data: None,
message_expiry_interval: None,
subscription_identifier: None,
payload_truncated,
};
engine.log(
&id, LogLevel::Info, "publish_received",
gpui-app/src/ui/app.rs
+20 -13
View File
@@ -2,6 +2,7 @@
use std::collections::{HashMap, VecDeque};
use std::path::PathBuf;
use std::sync::Arc;
use gpui_kit::component::button::{Button, ButtonVariants as _, ButtonVariant};
use gpui_kit::component::scroll::ScrollableElement as _;
@@ -24,7 +25,7 @@ use crate::aliyun::AliyunPreset;
use crate::model::{
AppSettings, ConnectionConfig, ConnectionStatus, Direction, GlobalVariable, LogEntry,
LogLevel, MqttRecord, PublishParams, PublishPreset, SubscribeOptions, Subscription,
ThemeModePref,
ThemeModePref, retained_payload,
};
use crate::mqtt::{EngineEvent, MqttEngine};
use crate::store::Storage;
@@ -83,7 +84,8 @@ pub struct MqttXApp {
// ── 运行时状态 ──
pub statuses: HashMap<String, ConnectionStatus>,
pub errors: HashMap<String, String>,
pub messages: HashMap<String, Vec<MqttRecord>>,
/// 每连接消息环形缓冲：键为驻留后的连接 ID，容量受 max_messages 约束
pub messages: HashMap<Arc<str>, VecDeque<MqttRecord>>,
pub logs: VecDeque<LogEntry>,
pub seq: u64,
@@ -308,7 +310,7 @@ impl MqttXApp {
let id = record.connection_id.clone();
record.seq = self.next_seq();
self.push_message(id.clone(), record);
if let Some(view) = self.views.get(&id) {
if let Some(view) = self.views.get(id.as_ref()) {
view.update(cx, |_, cx| cx.notify());
}
}
@@ -321,11 +323,12 @@ impl MqttXApp {
content_type,
user_properties,
} => {
let (payload, payload_truncated) = retained_payload(&payload);
let record = MqttRecord {
seq: self.next_seq(),
connection_id: connection_id.clone(),
connection_id: Arc::from(connection_id.as_str()),
direction: Direction::Published,
topic,
topic: Arc::from(topic.as_str()),
payload,
qos,
retain,
@@ -336,9 +339,10 @@ impl MqttXApp {
correlation_data: None,
message_expiry_interval: None,
subscription_identifier: None,
payload_truncated,
};
self.push_message(connection_id.clone(), record);
if let Some(view) = self.views.get(&connection_id) {
self.push_message(Arc::from(connection_id.as_str()), record);
if let Some(view) = self.views.get(connection_id.as_str()) {
view.update(cx, |_, cx| cx.notify());
}
}
@@ -400,14 +404,17 @@ impl MqttXApp {
self.seq
}
fn push_message(&mut self, connection_id: String, record: MqttRecord) {
fn push_message(&mut self, connection_id: Arc<str>, record: MqttRecord) {
let cap = self.settings.max_messages.max(100);
let list = self.messages.entry(connection_id).or_default();
if list.len() >= cap {
let drop_n = list.len() - cap + 1;
list.drain(0..drop_n);
let list = self
.messages
.entry(connection_id)
.or_insert_with(|| VecDeque::with_capacity(cap));
// 环形缓冲：满则丢最旧，均摊 O(1)（原来的 Vec::drain 是 O(n) 搬移）
while list.len() >= cap {
list.pop_front();
}
list.push(record);
list.push_back(record);
}
fn push_log(&mut self, entry: LogEntry) {
gpui-app/src/ui/connection_view.rs
+19 -7
View File
@@ -24,8 +24,9 @@ use gpui_kit::{
use gpui_kit::component::IndexPath;
use crate::model::{
render_template, render_will_templates, ConnectionConfig, ConnectionStatus, Direction, GlobalVariable,
LogLevel, MqttRecord, PayloadFormat, PublishParams, SubscribeOptions, Subscription,
render_template, render_will_templates, ConnectionConfig, ConnectionStatus, Direction,
GlobalVariable, LogLevel, MqttRecord, PayloadFormat, PublishParams, SubscribeOptions,
Subscription, MAX_PAYLOAD_RETAIN,
};
use crate::mqtt::MqttEngine;
use crate::ui::app::MqttXApp;
@@ -1285,7 +1286,7 @@ impl ConnectionView {
.font_family(mono.clone())
// 匹配到订阅色时主题文字着色，否则保持默认前景色
.when_some(sub_color, |t, hue| t.text_color(hue_color(hue)))
.child(record.topic.clone()),
.child(record.topic.to_string()),
)
.child(
div()
@@ -1315,6 +1316,17 @@ impl ConnectionView {
.child("retain"),
)
})
.when(record.payload_truncated, |t| {
t.child(
div()
.text_xs()
.px_1()
.rounded_sm()
.bg(cx.theme().warning.alpha(0.15))
.text_color(cx.theme().warning)
.child(format!("已截断 {}KB", MAX_PAYLOAD_RETAIN / 1024)),
)
})
.child(
div()
.text_xs()
@@ -1385,7 +1397,7 @@ impl ConnectionView {
.tooltip("复制主题")
.on_click(move |_, window, cx| {
cx.stop_propagation();
cx.write_to_clipboard(ClipboardItem::new_string(copy_topic.clone()));
cx.write_to_clipboard(ClipboardItem::new_string(copy_topic.to_string()));
window.push_notification(Notification::success("已复制主题"), cx);
}),
)
@@ -1398,7 +1410,7 @@ impl ConnectionView {
.tooltip("复制负载原文")
.on_click(move |_, window, cx| {
cx.stop_propagation();
cx.write_to_clipboard(ClipboardItem::new_string(copy_payload.clone()));
cx.write_to_clipboard(ClipboardItem::new_string(copy_payload.to_string()));
window.push_notification(Notification::success("已复制负载"), cx);
}),
)
@@ -1533,7 +1545,7 @@ impl ConnectionView {
.collect();
let mut matched = 0usize;
let mut records: Vec<MqttRecord> = Vec::new();
if let Some(m) = app.messages.get(&conn) {
if let Some(m) = app.messages.get(conn.as_str()) {
for r in m.iter().rev() {
// 方向 / 搜索 / 订阅过滤叠加，过滤后再截断保证最新消息优先
let dir_ok = match dir {
@@ -1742,7 +1754,7 @@ impl ConnectionView {
view.detail_format = DetailFormat::Auto;
if let Some(app) = view.app.upgrade() {
app.update(cx, |app, cx| {
app.messages.remove(&clear_id);
app.messages.remove(clear_id.as_str());
cx.notify();
});
}