tools/testing/selftests/net/packetdrill/tcp_fast_recovery_prr-ss-30pkt-lost-1_4-11_16.pkt

Source file repositories/reference/linux-study-clean/tools/testing/selftests/net/packetdrill/tcp_fast_recovery_prr-ss-30pkt-lost-1_4-11_16.pkt

File Facts

System: Linux kernel
Corpus path: tools/testing/selftests/net/packetdrill/tcp_fast_recovery_prr-ss-30pkt-lost-1_4-11_16.pkt
Extension: .pkt
Size: 1906 bytes
Lines: 51
Domain: Support Tooling And Documentation
Bucket: tools
Inferred role: Support Tooling And Documentation: tools
Status: atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

No C-style include directives detected by the generator.

Detected Declarations

No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
// Test PRR-slowstart implementation. The sender sends 20 packets. Packet
// 1 to 4, and 11 to 16 are dropped.
`./defaults.sh`

// Establish a connection.
    0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
   +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
   +0 bind(3, ..., ...) = 0
   +0 listen(3, 1) = 0

   +0 < S 0:0(0) win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 7>
   +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8>

 +.01 < . 1:1(0) ack 1 win 320
   +0 accept(3, ..., ...) = 4

// Write 20 data segments.
   +0 write(4, ..., 20000) = 20000
   +0 > P. 1:10001(10000) ack 1

// Receive first DUPACK, entering PRR part
 +.01 < . 1:1(0) ack 1 win 320 <sack 4001:5001,nop,nop>
   +0 > . 10001:11001(1000) ack 1
+.002 < . 1:1(0) ack 1 win 320 <sack 4001:6001,nop,nop>
   +0 > . 11001:12001(1000) ack 1
+.002 < . 1:1(0) ack 1 win 320 <sack 4001:7001,nop,nop>
   +0 > . 1:1001(1000) ack 1
+.002 < . 1:1(0) ack 1 win 320 <sack 4001:8001,nop,nop>
   +0 > . 1001:2001(1000) ack 1
+.002 < . 1:1(0) ack 1 win 320 <sack 4001:9001,nop,nop>
   +0 > . 2001:3001(1000) ack 1
+.002 < . 1:1(0) ack 1 win 320 <sack 4001:10001,nop,nop>
   +0 > . 3001:4001(1000) ack 1
// Enter PRR CRB
+.002 < . 1:1(0) ack 1 win 320 <sack 4001:11001,nop,nop>
   +0 > . 12001:13001(1000) ack 1
+.002 < . 1:1(0) ack 1 win 320 <sack 4001:12001,nop,nop>
   +0 > . 13001:14001(1000) ack 1
// Enter PRR slow start
 +.01 < . 1:1(0) ack 1001 win 320 <sack 4001:12001,nop,nop>
   +0 > P. 14001:16001(2000) ack 1
+.002 < . 1:1(0) ack 1001 win 320 <sack 2001:12001,nop,nop>
   +0 > . 1001:2001(1000) ack 1
   +0 > . 16001:17001(1000) ack 1
// inflight reaches ssthresh, goes into packet conservation mode
+.002 < . 1:1(0) ack 1001 win 320 <sack 2001:13001,nop,nop>
   +0 > . 17001:18001(1000) ack 1
+.002 < . 1:1(0) ack 1001 win 320 <sack 2001:14001,nop,nop>
   +0 > . 18001:19001(1000) ack 1

Annotation

Atlas domain: Support Tooling And Documentation / tools.
Implementation status: atlas-only.

Implementation Notes

This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.