Re: Comparison of FreeBSD/Linux TCP Throughput performance

I see.
It shows that linux default setup is better.

Have you seen any FreeBSD performance tuning guides?

Regards,
Istvan

2009/10/16 Hongtao Yin <htyin@xxxxxxxxxx>

Istvan,



I ran newer FreeBSD code 8.0 RC1 this time. By using NetPIPE, we collected
test data and the result shows that FreeBSD TCP performance is worse than
Linux. I got troubles to plot using gnuplot, so here I am attaching the raw
data files.

The netpipe commands are as follows:

PC2: #NPtcp

PC1: #NPtcp ?h 192.168.1.20



Regards,

Hongtao






------------------------------

*From:* István [mailto:leccine@xxxxxxxxx]
*Sent:* 2009年10月15日 5:13

*To:* Hongtao Yin
*Cc:* freebsd-performance@xxxxxxxxxxx
*Subject:* Re: Comparison of FreeBSD/Linux TCP Throughput performance



use netpipe TCP pls.



And graph it.



Thanks in advance,

Istvan

On Thu, Oct 15, 2009 at 2:42 AM, Hongtao Yin <htyin@xxxxxxxxxx> wrote:

Hi,



I compared TCP performance between FreeBSD and Linux by running test tools
Netperf and Iperf with Intel NIC.

The kernels are full version and default values are used in the testing
except TCP Congestion Control algorithm set to Reno.

From the test results we can see Linux TCP performance in throughput is
better than FreeBSD. The worst case (send msg size 128) shows that FreeBSD
throughput is only 43% of Linux's.



I like to get some feedback if anyone did similar comparison test, or knows
any issues with kernels or drivers. Thanks lot.



FreeBSD and Linux Sysctl captures are attached for reference.



Regards,

Hongtao







Test Environments:

PC: Dell Precision T3400 (same 4 PCs)

CPU: Intel Core 2 Duo CPU E4600@xxxxxx

FreeBSD: V7.1 (full version) (TCP CC: newReno)

Linux: V2.6.31.1 (full version) (TCP CC: Reno)

Ethernet card: Intel Pro/1000 PWLA8492 MT Dual Port Server Adapter
(Gigabit)
chip 82546EB (only one port used for each PC)

Switch: Netgear ProSafe 8 port Gigabit Switch (model GS108)

Iperf: V2.0.4

Netperf: V2.4.4



Setup:





----------

| switch |

----------

---------------------| | | |--------------------

| | | |

| --------| |-------- |

| | | |

| | | |

-------------- -------------- -------------- --------------

| PC1 | | PC2 | | PC3 | | PC4 |

| FreeBSD | | FreeBSD | | Linux | | Linux |

|192.168.1.10| |192.168.1.20| |192.168.1.30| |192.168.1.40|

-------------- -------------- -------------- --------------











================================

Netperf Test Results

================================



TCP Throughput Test

-------------------



PC2/4: #netserver -p 22113

PC1/3: #netperf -H 192.168.1.20 -p 22113 -l 10



Recv Send Send Elapsed
Throughput

Socket Socket Message Time
10^6 bits/sec

Size Size Size Sec.

bytes bytes bytes

FreeBSD: 65536 32768 32768 10.34
598.11

Linux: 87380 16384 16384 10.04
779.02





PC1/3: #netperf -t TCP_STREAM -H 192.168.1.20 -p 22113 -- -m
64/128/256/512/1024/2048/4096



Recv Send Send Elapsed
Throughput

Socket Socket Message Time
10^6 bits/sec

Size Size Size Sec.

bytes bytes bytes

FreeBSD: 65536 32768 64 10.19
417.10

65536 32768 128 10.35
336.63

65536 32768 256 10.36
576.99

65536 32768 512 10.35
569.79

65536 32768 1024 10.35
553.70

65536 32768 2048 10.35
584.20

65536 32768 4096 10.35
602.45



Linux: 87380 16384 64 10.03
778.21

87380 16384 128 10.03
779.72

87380 16384 256 10.04
780.16

87380 16384 512 10.03
776.85

87380 16384 1024 10.04
777.52

87380 16384 2048 10.04
777.83

87380 16384 4096 10.03
780.17









===============================

Iperf Test Results

===============================



Bandwidth Test

--------------



PC2/4: #iperf -s

PC1/3: #iperf -c 192.168.1.20



Interval Transfer Bandwidth

sec MBytes Mbits/sec

FreeBSD: 0.0-10.3 740 600

Linux: 0.0-10.0 972 815





PC1/3: #iperf -c 192.168.1.20 -d



Interval Transfer Bandwidth

sec MBytes Mbits/sec

FreeBSD: 0.0-10.0 402 337

0.0-10.0 404 338



Linux: 0.0-10.0 926 776

0.0-10.0 44.1 36.9





Parallel Test

-------------



PC2/4: #iperf -s

PC1/3: #iperf -c 192.168.1.20 -P 2



Interval Transfer Bandwidth

sec MBytes Mbits/sec

FreeBSD: 0.0-10.3 370 300

0.0-10.3 370 300

SUM: 0.0-10.3 739 600



Linux: 0.0-10.0 479 402

0.0-10.0 473 396

SUM: 0.0-10.0 952 797








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