wanderer/ fastnetmon-ng
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Add remark about ninja and compilation speedup; Rewrite fine tuning guide

This commit is contained in:
Pavel Odintsov 2015-05-15 11:26:28 +03:00
parent 4d0240c864
commit 6ebb02fdd9
1 changed files with 21 additions and 12 deletions
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33
docs/FINE_TUNING.md
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@ -15,32 +15,28 @@ su fastnetmon
Please keep in mind when run tool on OpenVZ because without root permissions tool can't get all VE ips and you should pass it explicitly.
Debugging flags.
DUMP_ALL_PACKETS will enable all packets dumping to console. It's very useful for testing tool on non standard platforms.
```bash
DUMP_ALL_PACKETS=yes ./fastnetmon eth3,eth4
DUMP_ALL_PACKETS=yes ./fastnetmon
```
Recommended configuration options for ixgbe Intel X540 driver:
Recommended configuration options for ixgbe Intel X540 driver (netmap mode):
```bash
cat /etc/modprobe.d/ixgbe.conf
options ixgbe IntMode=2,2 MQ=1,1 DCA=2,2 RSS=8,8 VMDQ=0,0 max_vfs=0,0 L2LBen=0,0 InterruptThrottleRate=1,1 FCoE=0,0 LRO=1,1 allow_unsupported_sfp=0,0
```
I got very big packet size (more than mtu) in attack log? This issue will be related with offload features of NIC. For INtel 82599 I recommend disable all offload:
I got very big packet size (more than mtu) in attack log? In PF_RING this behaviour will be related with offload features of NIC. For INtel 82599 I recommend disable all offload:
```bash
ethtool -K eth0 gro off gso off tso off
```
How I can enable hardware filtration for Intel 82599 NIC? Install patched ixgbe driver from PF_RING distro and apply this patch to Makefile and recompile tool:
How I can enable hardware filtration for Intel 82599 NIC? Install patched ixgbe driver from PF_RING distro and apply this patch to CMakeLists.txt and recompile tool:
```bash
fastnetmon.o: fastnetmon.cpp
- $(COMPILER) $(STATIC) $(DEFINES) $(HEADERS) -c fastnetmon.cpp -o fastnetmon.o $(BUILD_FLAGS)
+ $(COMPILER) $(STATIC) $(DEFINES) $(HEADERS) -c fastnetmon.cpp -o fastnetmon.o $(BUILD_FLAGS) -DHWFILTER_LOCKING
add_definitions(-DHWFILTER_LOCKING)
```
How I can compile FastNetMon without PF_RING support?
@ -63,12 +59,25 @@ If tou want build tool with debug info:
cmake -DCMAKE_BUILD_TYPE=Debug ..
```
If you want speedup build process please build with ninja instead of make:
```bash
apt-get install -y ninja-build
cd build
cmake -GNinja ..
```
Ninja use all CPUs for build process:
```bash
1 [||||||||||||||||||||||||||||||||||||||||||||||100.0%] Tasks: 53, 103 thr, 64 kthr; 6 running
2 [||||||||||||||||||||||||||||||||||||||||||||||100.0%] Load average: 1.32 0.45 0.19
3 [||||||||||||||||||||||||||||||||||||||||||||||100.0%] Uptime: 1 day, 12:58:40
4 [||||||||||||||||||||||||||||||||||||||||||||||100.0%]
```
Performance tuning:
- Do not use short prefixes (lesser then /24)
- Do not use extremely big prefixes (/8, /16) because memory consumption will be very big
How I can enable ZC support? Please install DNA/ZC dreivers, load they and add interface name with zc prefix in config file (i.e. zc:eth3)
How I can optimally use ZC mode? You should enable number of NIC queues as number of logical cores in load_driver.sh
How I can enable ZC support for PF_RING? Please install DNA/ZC dreivers, load they and add interface name with zc prefix in config file (i.e. zc:eth3)
You can find more info and graphics [here](http://forum.nag.ru/forum/index.php?showtopic=89703)