v1_EN_RaspberryPi

Performance benchmark for SRS on RaspberryPi

SRS can running on armv6(RaspberryPi) or armv7(Android). The bellow data show the performance benchmark.

Install SRS

Download the binary for armv6 from Github or SRS Server

RaspberryPi

The hardware of raspberrypi:

• RaspberryPi：Type B
• SoC BroadcomBCM2835(CPU,GPU,DSP,SDRAM,USB)
• CPU ARM1176JZF-S(ARM11) 700MHz
• GPU Broadcom VideoCore IV, OpenGL ES 2.0, 1080p 30 h.264/MPEG-4 AVC decoder
• RAM 512MByte
• USB 2 x USB2.0
• VideoOutput Composite RCA(PAL&NTSC), HDMI(rev 1.3&1.4), raw LCD Panels via DSI 14 HDMI resolution from 40x350 to 1920x1200 plus various PAL and NTSC standards
• AudioOutput 3.5mm, HDMI
• Storage SD/MMC/SDIO socket
• Network 10/100 ethernet
• Device 8xGPIO, UART, I2C, SPI bus, +3.3V, +5V, ground(nagetive)
• Power 700mA(3.5W) 5V
• Size 85.60 x 53.98 mm(3.370 x 2.125 in)
• OS Debian GNU/linux, Fedora, Arch Linux ARM, RISC OS, XBMC

Software:

• RaspberryPi img：2014-01-07-wheezy-raspbian.img
• uname: Linux raspberrypi 3.10.25+ #622 PREEMPT Fri Jan 3 18:41:00 GMT 2014 armv6l GNU/Linux
• cpu: arm61
• Server: srs 0.9.38
• ServerType: raspberry pi
• Client：st-load
• ClientType: Virtual Machine Centos6
• Play: PC win7, flash
• Network: 100Mbps

Stream information:

• Video Bitrate: 200kbps
• Resolution: 768x320
• Audio Bitrate: 30kbps

For arm SRS: arm

OS settings

Login as root, set the fd limits:

• Set limit: ulimit -HSn 10240
• View the limit:

[root@dev6 ~]# ulimit -n
10240

• Restart SRS：sudo /etc/init.d/srs restart

Publish and Play

Use centos to publish to SRS:

• Start FFMPEG:

for((;;)); do \
    ./objs/ffmpeg/bin/ffmpeg \
        -re -i doc/source.200kbps.768x320.flv \
        -acodec copy -vcodec copy \
        -f flv -y rtmp://192.168.1.105:1935/live/livestream; \
    sleep 1; 
done

* Play RTMP: `rtmp://192.168.1.105:1935/live/livestream`
* Online Play: [Online Player](http://winlinvip.github.io/simple-rtmp-server/trunk/research/players/srs_player.html?server=192.168.1.105&port=1935&app=live&stream=livestream&vhost=192.168.1.105&autostart=true)

## Client

The RTMP load test tool, read [st-load](https://github.com/winlinvip/st-load)

The st_rtmp_load used to test RTMP load, support 800-3k concurrency for each process.

* Build: `./configure && make`
* Start: `./objs/st_rtmp_load -c 800 -r <rtmp_url>`

## Record Data

Record data before test:

* The cpu for SRS:

```bash
pid=`ps aux|grep srs|grep objs|awk '{print $2}'` && top -p $pid

• The cpu for st-load:

pid=`ps aux|grep load|grep rtmp|awk '{print $2}'` && top -p $pid

• The connections:

for((;;)); do \
    srs_connections=`sudo netstat -anp|grep 1935|grep ESTABLISHED|wc -l`;  \
    echo "srs_connections: $srs_connections";  \
    sleep 5;  \
done

• The bandwidth in NBps:

[winlin@dev6 ~]$ dstat 30
----total-cpu-usage---- -dsk/total- -net/lo- ---paging-- ---system--
usr sys idl wai hiq siq| read  writ| recv  send|  in   out | int   csw 
  0   0  96   0   0   3|   0     0 |1860B   58k|   0     0 |2996   465 
  0   1  96   0   0   3|   0     0 |1800B   56k|   0     0 |2989   463 
  0   0  97   0   0   2|   0     0 |1500B   46k|   0     0 |2979   461 

• The table

Server	CPU	Memory	Clients	ExpectNbps	ActualNbps	st-load	Latency
SRS	1.0%	3MB	3	-	-	-	0.8s

Benchmark SRS 0.9.38

Let's start performance benchmark.

• The data for 10 clients:

./objs/st_rtmp_load -c 10 -r rtmp://192.168.1.105:1935/live/livestream >/dev/null &

Server	CPU	Memory	Clients	ExpectNbps	ActualNbps	st-load	Latency
SRS	17%	1.4MB	11	2.53Mbps	2.6Mbps	1.3%	1.7s

• The data for 20 clients:

Server	CPU	Memory	Clients	ExpectNbps	ActualNbps	st-load	Latency
SRS	23%	2MB	21	4.83Mbps	5.5Mbps	2.3%	1.5s

• The data for 30 clients:

Server	CPU	Memory	Clients	ExpectNbps	ActualNbps	st-load	Latency
SRS	50%	4MB	31	7.1Mbps	8Mbps	4%	2s

The summary for RaspberryPi Type B, 230kbps performance:

Server	CPU	Memory	Clients	ExpectNbps	ActualNbps	st-load	Latency
SRS	17%	1.4MB	11	2.53Mbps	2.6Mbps	1.3%	1.7s
SRS	23%	2MB	21	4.83Mbps	5.5Mbps	2.3%	1.5s
SRS	50%	4MB	31	7.1Mbps	8Mbps	4%	2s

Benchmark SRS 0.9.72

The benchmark for RTMP SRS 0.9.72.

Server	CPU	Memory	Clients	ExpectNbps	ActualNbps	st-load	Latency
SRS	5%	2MB	2	1Mbps	1.2Mbps	0%	1.5s
SRS	20%	2MB	12	6.9Mbps	6.6Mbps	2.8%	2s
SRS	36%	2.4MB	22	12.7Mbps	12.9Mbps	2.3%	2.5s
SRS	47%	3.1MB	32	18.5Mbps	18.5Mbps	5%	2.0s
SRS	62%	3.4MB	42	24.3Mbps	25.7Mbps	9.3%	3.4s
SRS	85%	3.7MB	52	30.2Mbps	30.7Mbps	13.6%	3.5s

cubieboard benchmark

No data.

Winlin 2014.11