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@@ -749,6 +749,16 @@ do. Read them before writing anything that touches the same mechanism.
core at 131 MB/s. Splitting there also means no key leaves the node's own
process
+- **A transfer capped with no core busy and no loss in the log: read the
+ kernel's drop counter on the receiving machine.** Uploads ran at 6.5 MB/s.
+ The chunk handler was timed (0.7 ms a chunk, 30 % of the time), the window
+ the node advertises was read (1 MB), and neither was it. `nstat -az | grep
+ RcvbufErrors` before and after one upload was: 2460 datagrams dropped at the
+ node's own socket. Same cause as downloads, mirrored, and the node's log
+ cannot show it because the sender that backs off is the browser. A 4 MB
+ socket buffer gave 19.5 MB/s (`udp_buffer.py`); it needs
+ `net.core.rmem_max` raised on a default machine
+
### More of the same, from four rounds of live testing
- **A protocol harness cannot test the SPA.** Any second implementation of the