1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
use crate::banking_stage::FORWARD_TRANSACTIONS_TO_LEADER_AT_SLOT_OFFSET;
use crate::packet::PacketsRecycler;
use crate::poh_recorder::PohRecorder;
use crate::result::{Error, Result};
use crate::streamer::{self, PacketReceiver, PacketSender};
use solana_measure::thread_mem_usage;
use solana_metrics::{inc_new_counter_debug, inc_new_counter_info};
use solana_perf::recycler::Recycler;
use solana_sdk::clock::DEFAULT_TICKS_PER_SLOT;
use std::net::UdpSocket;
use std::sync::atomic::AtomicBool;
use std::sync::mpsc::{channel, RecvTimeoutError};
use std::sync::{Arc, Mutex};
use std::thread::{self, Builder, JoinHandle};
pub struct FetchStage {
thread_hdls: Vec<JoinHandle<()>>,
}
impl FetchStage {
#[allow(clippy::new_ret_no_self)]
pub fn new(
sockets: Vec<UdpSocket>,
tpu_forwards_sockets: Vec<UdpSocket>,
exit: &Arc<AtomicBool>,
poh_recorder: &Arc<Mutex<PohRecorder>>,
) -> (Self, PacketReceiver) {
let (sender, receiver) = channel();
(
Self::new_with_sender(sockets, tpu_forwards_sockets, exit, &sender, &poh_recorder),
receiver,
)
}
pub fn new_with_sender(
sockets: Vec<UdpSocket>,
tpu_forwards_sockets: Vec<UdpSocket>,
exit: &Arc<AtomicBool>,
sender: &PacketSender,
poh_recorder: &Arc<Mutex<PohRecorder>>,
) -> Self {
let tx_sockets = sockets.into_iter().map(Arc::new).collect();
let tpu_forwards_sockets = tpu_forwards_sockets.into_iter().map(Arc::new).collect();
Self::new_multi_socket(
tx_sockets,
tpu_forwards_sockets,
exit,
&sender,
&poh_recorder,
)
}
fn handle_forwarded_packets(
recvr: &PacketReceiver,
sendr: &PacketSender,
poh_recorder: &Arc<Mutex<PohRecorder>>,
) -> Result<()> {
let msgs = recvr.recv()?;
let mut len = msgs.packets.len();
let mut batch = vec![msgs];
while let Ok(more) = recvr.try_recv() {
len += more.packets.len();
batch.push(more);
if len > 1024 {
break;
}
}
if poh_recorder.lock().unwrap().would_be_leader(
FORWARD_TRANSACTIONS_TO_LEADER_AT_SLOT_OFFSET
.saturating_add(1)
.saturating_mul(DEFAULT_TICKS_PER_SLOT),
) {
inc_new_counter_debug!("fetch_stage-honor_forwards", len);
for packets in batch {
if sendr.send(packets).is_err() {
return Err(Error::SendError);
}
}
} else {
inc_new_counter_info!("fetch_stage-discard_forwards", len);
}
Ok(())
}
fn new_multi_socket(
sockets: Vec<Arc<UdpSocket>>,
tpu_forwards_sockets: Vec<Arc<UdpSocket>>,
exit: &Arc<AtomicBool>,
sender: &PacketSender,
poh_recorder: &Arc<Mutex<PohRecorder>>,
) -> Self {
let recycler: PacketsRecycler = Recycler::warmed(1000, 1024);
let tpu_threads = sockets.into_iter().map(|socket| {
streamer::receiver(
socket,
&exit,
sender.clone(),
recycler.clone(),
"fetch_stage",
)
});
let (forward_sender, forward_receiver) = channel();
let tpu_forwards_threads = tpu_forwards_sockets.into_iter().map(|socket| {
streamer::receiver(
socket,
&exit,
forward_sender.clone(),
recycler.clone(),
"fetch_forward_stage",
)
});
let sender = sender.clone();
let poh_recorder = poh_recorder.clone();
let fwd_thread_hdl = Builder::new()
.name("solana-fetch-stage-fwd-rcvr".to_string())
.spawn(move || loop {
thread_mem_usage::datapoint("solana-fetch-stage-fwd-rcvr");
if let Err(e) =
Self::handle_forwarded_packets(&forward_receiver, &sender, &poh_recorder)
{
match e {
Error::RecvTimeoutError(RecvTimeoutError::Disconnected) => break,
Error::RecvTimeoutError(RecvTimeoutError::Timeout) => (),
Error::RecvError(_) => break,
Error::SendError => break,
_ => error!("{:?}", e),
}
}
})
.unwrap();
let mut thread_hdls: Vec<_> = tpu_threads.chain(tpu_forwards_threads).collect();
thread_hdls.push(fwd_thread_hdl);
Self { thread_hdls }
}
pub fn join(self) -> thread::Result<()> {
for thread_hdl in self.thread_hdls {
thread_hdl.join()?;
}
Ok(())
}
}