From Kyle Ambroff-Kao <kyle@xxxxxxxxxxxxxx>:
Kyle Ambroff-Kao has uploaded this change for review. (
https://review.haiku-os.org/c/haiku/+/2780 ;)
Change subject: tcp: Remove sanity checks from BufferQueue in release builds
......................................................................
tcp: Remove sanity checks from BufferQueue in release builds
Each TCPEndpoint has two BufferQueue members, one for the send queue
and one for the receive queue.
If DEBUG_BUFFER_QUEUE is enabled, then most methods of BufferQueue
call BufferQueue::Verify(), sometimes twice. This member function
performs some sanity checking which requires iterating through every
net_buffer in the queue.
Disabling this in a debug build improved throughput by a factor of 5x
over the loopback interface on my laptop. Using iperf the measured
throughput went from 900Mbps to around 4.8Gbps.
This patch turns this sanity checking off for release builds.
* Rename DEBUG_BUFFER_QUEUE to DEBUG_TCP_BUFFER_QUEUE
* Change the default in BufferQueue.cpp to 0
* Set DEBUG_TCP_BUFFER_QUEUE to KDEBUG_LEVEL_2 in
kernel_debug_config.h
---
M build/config_headers/kernel_debug_config.h
M src/add-ons/kernel/network/protocols/tcp/BufferQueue.cpp
M src/add-ons/kernel/network/protocols/tcp/BufferQueue.h
M src/add-ons/kernel/network/protocols/tcp/TCPEndpoint.cpp
M src/tests/system/network/tcp_shell/BufferQueueTest.cpp
5 files changed, 12 insertions(+), 9 deletions(-)
git pull ssh://git.haiku-os.org:22/haiku refs/changes/80/2780/1
diff --git a/build/config_headers/kernel_debug_config.h
b/build/config_headers/kernel_debug_config.h
index 1dcc08f..4abc1ba 100644
--- a/build/config_headers/kernel_debug_config.h
+++ b/build/config_headers/kernel_debug_config.h
@@ -139,5 +139,8 @@
#define SYSTEM_PROFILE_STACK_DEPTH 10
#define SYSTEM_PROFILE_INTERVAL 10000
+// Enables additional assertions in the tcp add-on.
+#define DEBUG_TCP_BUFFER_QUEUE KDEBUG_LEVEL_2
+
#endif // KERNEL_DEBUG_CONFIG_H
diff --git a/src/add-ons/kernel/network/protocols/tcp/BufferQueue.cpp
b/src/add-ons/kernel/network/protocols/tcp/BufferQueue.cpp
index de83ba3..4d5ada0 100644
--- a/src/add-ons/kernel/network/protocols/tcp/BufferQueue.cpp
+++ b/src/add-ons/kernel/network/protocols/tcp/BufferQueue.cpp
@@ -19,7 +19,7 @@
# define TRACE(x)
#endif
-#if DEBUG_BUFFER_QUEUE
+#if DEBUG_TCP_BUFFER_QUEUE
# define VERIFY() Verify();
#else
# define VERIFY() ;
@@ -436,7 +436,7 @@
fPushPointer = fList.Tail()->sequence + fList.Tail()->size;
}
-#if DEBUG_BUFFER_QUEUE
+#if DEBUG_TCP_BUFFER_QUEUE
/*! Perform a sanity check of the whole queue.
*/
@@ -486,4 +486,4 @@
}
}
-#endif // DEBUG_BUFFER_QUEUE
+#endif // DEBUG_TCP_BUFFER_QUEUE
diff --git a/src/add-ons/kernel/network/protocols/tcp/BufferQueue.h
b/src/add-ons/kernel/network/protocols/tcp/BufferQueue.h
index 73986a8..8ac33f4 100644
--- a/src/add-ons/kernel/network/protocols/tcp/BufferQueue.h
+++ b/src/add-ons/kernel/network/protocols/tcp/BufferQueue.h
@@ -13,8 +13,8 @@
#include <util/DoublyLinkedList.h>
-#ifndef DEBUG_BUFFER_QUEUE
-# define DEBUG_BUFFER_QUEUE 1
+#ifndef DEBUG_TCP_BUFFER_QUEUE
+# define DEBUG_TCP_BUFFER_QUEUE 0
#endif
@@ -55,7 +55,7 @@
tcp_sequence NextSequence() const
{
return fFirstSequence + fContiguousBytes; }
-#if DEBUG_BUFFER_QUEUE
+#if DEBUG_TCP_BUFFER_QUEUE
void Verify() const;
void Dump() const;
#endif
diff --git a/src/add-ons/kernel/network/protocols/tcp/TCPEndpoint.cpp
b/src/add-ons/kernel/network/protocols/tcp/TCPEndpoint.cpp
index 9640f8b..0c4d9ca 100644
--- a/src/add-ons/kernel/network/protocols/tcp/TCPEndpoint.cpp
+++ b/src/add-ons/kernel/network/protocols/tcp/TCPEndpoint.cpp
@@ -2533,7 +2533,7 @@
kprintf(" max segment size: %" B_PRIu32 "\n", fSendMaxSegmentSize);
kprintf(" queue: %" B_PRIuSIZE " / %" B_PRIuSIZE "\n",
fSendQueue.Used(),
fSendQueue.Size());
-#if DEBUG_BUFFER_QUEUE
+#if DEBUG_TCP_BUFFER_QUEUE
fSendQueue.Dump();
#endif
kprintf(" last acknowledge sent: %" B_PRIu32 "\n",
@@ -2549,7 +2549,7 @@
kprintf(" max segment size: %" B_PRIu32 "\n",
fReceiveMaxSegmentSize);
kprintf(" queue: %" B_PRIuSIZE " / %" B_PRIuSIZE "\n",
fReceiveQueue.Available(), fReceiveQueue.Size());
-#if DEBUG_BUFFER_QUEUE
+#if DEBUG_TCP_BUFFER_QUEUE
fReceiveQueue.Dump();
#endif
kprintf(" initial sequence: %" B_PRIu32 "\n",
diff --git a/src/tests/system/network/tcp_shell/BufferQueueTest.cpp
b/src/tests/system/network/tcp_shell/BufferQueueTest.cpp
index ef8cbe0..ed54d35 100644
--- a/src/tests/system/network/tcp_shell/BufferQueueTest.cpp
+++ b/src/tests/system/network/tcp_shell/BufferQueueTest.cpp
@@ -3,7 +3,7 @@
* Distributed under the terms of the MIT License.
*/
-#define DEBUG_BUFFER_QUEUE 1
+#define DEBUG_TCP_BUFFER_QUEUE 1
#include "BufferQueue.h"
--
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Gerrit-Project: haiku
Gerrit-Branch: master
Gerrit-Change-Id: I262dac5d7e2889d2942bbdcf6b667cc0cbafa4c8
Gerrit-Change-Number: 2780
Gerrit-PatchSet: 1
Gerrit-Owner: Kyle Ambroff-Kao <kyle@xxxxxxxxxxxxxx>
Gerrit-MessageType: newchange
