From 25ff7146f23fe36fe79239ebb056c63f4db96065 Mon Sep 17 00:00:00 2001
From: George Hotz <72895+geohot@users.noreply.github.com>
Date: Wed, 25 Mar 2026 20:54:56 +0800
Subject: [PATCH] add a status line to REMOTE with DEBUG=1 (#15471)

* python speedups of hot paths

* add a status line to REMOTE with DEBUG=1

* pc

* t
---
 tinygrad/runtime/support/system.py | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/tinygrad/runtime/support/system.py b/tinygrad/runtime/support/system.py
index dc559d5bed..44922f0ace 100644
--- a/tinygrad/runtime/support/system.py
+++ b/tinygrad/runtime/support/system.py
@@ -1,6 +1,6 @@
 from __future__ import annotations
-import os, mmap, array, functools, ctypes, select, contextlib, dataclasses, sys, itertools, struct, socket, subprocess, time, enum
-from tinygrad.helpers import round_up, getenv, OSX, temp, ceildiv, unwrap, fetch, system, _ensure_downloads_dir
+import os, mmap, array, functools, ctypes, select, contextlib, dataclasses, sys, itertools, struct, socket, subprocess, time, enum, atexit
+from tinygrad.helpers import round_up, getenv, OSX, temp, ceildiv, unwrap, fetch, system, _ensure_downloads_dir, DEBUG
 from tinygrad.runtime.autogen import libc, pci, vfio, iokit, corefoundation
 from tinygrad.runtime.support.hcq import FileIOInterface, MMIOInterface, HCQBuffer, hcq_filter_visible_devices
 from tinygrad.runtime.support.memory import VirtMapping, AddrSpace, BumpAllocator
@@ -307,6 +307,11 @@ class RemoteMMIOInterface(MMIOInterface):
     return RemoteMMIOInterface(self.dev, self.residx, size or (self.nbytes - offset), fmt or self.fmt, self.off + offset, self.rd_cmd, self.wr_cmd)
 
 class RemotePCIDevice(PCIDevice):
+  _bulk_sent:int = 0
+  _bulk_recv:int = 0
+  _rpc_count:int = 0
+  _start_time:float = 0.0
+
   @staticmethod
   @functools.cache
   def remote_sock() -> socket.socket:
@@ -317,6 +322,14 @@ class RemotePCIDevice(PCIDevice):
     sock.settimeout(getenv("REMOTE_TIMEOUT", 3))
     sock.connect((host, port))
     sock.settimeout(None)
+    if DEBUG >= 1:
+      RemotePCIDevice._start_time = time.perf_counter()
+      def _print_stats():
+        dt = time.perf_counter() - RemotePCIDevice._start_time
+        sent_mb, recv_mb = RemotePCIDevice._bulk_sent / 1e6, RemotePCIDevice._bulk_recv / 1e6
+        print(f"remote: sent {sent_mb:,.2f} MB ({sent_mb/dt:,.2f} MB/s), recv {recv_mb:,.2f} MB ({recv_mb/dt:,.2f} MB/s), "
+              f"{RemotePCIDevice._rpc_count:,} roundtrips in {dt:.2f}s")
+      atexit.register(_print_stats)
     return sock
 
   @staticmethod
@@ -343,6 +356,7 @@ class RemotePCIDevice(PCIDevice):
     else: msg, fd = RemotePCIDevice._recvall(sock, 17), None
     if (resp:=struct.unpack('<BQQ', msg))[0] != 0:
       raise RuntimeError(f"RPC failed: {RemotePCIDevice._recvall(sock, resp[1]).decode('utf-8') if resp[1] > 0 else 'unknown error'}")
+    RemotePCIDevice._rpc_count += 1
     return (resp[1], resp[2]) + ((RemotePCIDevice._recvall(sock, readout_size) if readout_size > 0 else None),) + (fd,)
 
   def __init__(self, devpref:str, pcibus:str, sock:socket.socket|None=None):
@@ -352,8 +366,10 @@ class RemotePCIDevice(PCIDevice):
     self.lock_fd = System.flock_acquire(f"{devpref.lower()}_{pcibus.lower()}.lock")
 
   def _bulk_read(self, cmd:int, idx:int, offset:int, size:int) -> bytes:
+    RemotePCIDevice._bulk_recv += size
     return unwrap(self._rpc(self.sock, self.dev_id, cmd, offset, size, bar=idx, readout_size=size)[2])
   def _bulk_write(self, cmd:int, idx:int, offset:int, data:bytes):
+    RemotePCIDevice._bulk_sent += len(data)
     self.sock.sendall(struct.pack('<BIIQQQ', cmd, self.dev_id, idx, offset, len(data), 0) + data)
 
   def alloc_sysmem(self, size:int, vaddr:int=0, contiguous:bool=False) -> tuple[MMIOInterface, list[int]]: