Skip to content

Enable TCP_NODELAY #22

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
rickgaiser merged 1 commit into from
Feb 28, 2026
+9 −0
Merged

Enable TCP_NODELAY #22

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
9 changes: 9 additions & 0 deletions src/ps2link.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@
#include <pthread.h>
#ifndef _WIN32
#include <netinet/in.h>
#include <netinet/tcp.h>
#else
#include <windows.h>
#define sleep(x) Sleep(x * 1000)
Expand Down Expand Up @@ -52,6 +53,14 @@
// Connect to the request port.
request_socket = network_connect(hostname, 0x4711, SOCK_STREAM);

// Disable Nagle algorithm: without TCP_NODELAY, the two-part response
// (small header then data) interacts with PS2's delayed-ACK and causes
// ~200 ms stall per read() syscall, making fread() ~400x slower than read().
if (request_socket > 0) {
int one = 1;
setsockopt(request_socket, IPPROTO_TCP, TCP_NODELAY, &one, sizeof(one));
}

// Create the request thread.
if (request_socket > 0) { pthread_create(&request_thread_id, NULL, ps2link_thread_request, (void *)&request_thread_id); }

Expand Down