[Tutorial] running golang using latest release gcc 5.2 on OpenWRT (WiTi Board/MIPS CPU)

[Michal Wisler]

Hi, guys

I like golang a lot. I want to play golang an my router and develop some applications for router using golang. 

Here comes a tutorial let you running golang using the official gcc latest release - gcc 5.2.

You will learn how to build a OpenWRT OS and toolchain from scratch.

The device i am testing is WiTi board. They are crowd funding at indiegogo

If you have any problem on compilation, I'm willing to help.

The performance is not bad, my test program is:

import (                                               

        "fmt"                                          

        "runtime"                                      

        "time"                                         

)                                                      

                                                       

func GetCPUCount() {                                   

        print("GOOS:", runtime.GOOS, "\n")             

        print("GOARCH:", runtime.GOARCH, "\n")         

        print("NumCPU:", fmt.Sprintf("%d", runtime.NumCPU()), "\n")

}                                                      

                                                       

func perfTest(c chan bool, n int) {                    

        x := 0                                         

        for i := 0; i < 100000000; i++ {               

                x += i                                 

        }                                              

        println(n, " ", x)                             

        if n == 9 {                                    

                c <- true                              

        }                                              

}                                                      

                                                       

func PerfTest() {   

  GetCPUCount()                 

        println("start")                               

        t1 := time.Now()                               

        c := make(chan bool)                           

        for i := 0; i < 10; i++ {                      

                go perfTest(c, i)                      

        }                                              

        <-c                                            

        println("done, ", time.Now().Sub(t1).String()) 

}

The result is

root@Witi:/mnt/sda1# ./startMIPSTest

GOOS:linux                          

GOARCH:mipso32                      

NumCPU:4                            

start                               

0   887459712                       

1   887459712                       

5   887459712                       

2   887459712                       

4   887459712                       

3   887459712                       

8   887459712                       

9   887459712                       

done,  9.848502s                    

root@Witi:/mnt/sda1#      

cpuinfo

root@Witi:/mnt/sda1# cat /proc/cpuinfo
system type             : MT7621
machine                 : Witi
processor               : 0
cpu model               : MIPS 1004Kc V2.15
BogoMIPS                : 583.68
wait instruction        : yes
microsecond timers      : yes
tlb_entries             : 32
extra interrupt vector  : yes
hardware watchpoint     : yes, count: 4, address/irw mask: [0x0ffc, 0x0ffc,
0x0ffb, 0x0ffb]
isa                     : mips1 mips2 mips32r1 mips32r2
ASEs implemented        : mips16 dsp mt
shadow register sets    : 1
kscratch registers      : 0
core                    : 0
VPE                     : 0
VCED exceptions         : not available
VCEI exceptions         : not available

processor               : 1
cpu model               : MIPS 1004Kc V2.15
BogoMIPS                : 583.68
wait instruction        : yes
microsecond timers      : yes
tlb_entries             : 32
extra interrupt vector  : yes
hardware watchpoint     : yes, count: 4, address/irw mask: [0x0ffc, 0x0ffc,
0x0ffb, 0x0ffb]
isa                     : mips1 mips2 mips32r1 mips32r2
ASEs implemented        : mips16 dsp mt
shadow register sets    : 1
kscratch registers      : 0
core                    : 0
VPE                     : 1
VCED exceptions         : not available
VCEI exceptions         : not available

processor               : 2
cpu model               : MIPS 1004Kc V2.15
BogoMIPS                : 583.68
wait instruction        : yes
microsecond timers      : yes
tlb_entries             : 32
extra interrupt vector  : yes
hardware watchpoint     : yes, count: 4, address/irw mask: [0x0ffc, 0x0ffc,
0x0ffb, 0x0ffb]
isa                     : mips1 mips2 mips32r1 mips32r2
ASEs implemented        : mips16 dsp mt
shadow register sets    : 1
kscratch registers      : 0
core                    : 1
VPE                     : 0
VCED exceptions         : not available
VCEI exceptions         : not available

processor               : 3
cpu model               : MIPS 1004Kc V2.15
BogoMIPS                : 583.68
wait instruction        : yes
microsecond timers      : yes
tlb_entries             : 32
extra interrupt vector  : yes
hardware watchpoint     : yes, count: 4, address/irw mask: [0x0ffc, 0x0ffc,
0x0ffb, 0x0ffb]
isa                     : mips1 mips2 mips32r1 mips32r2
ASEs implemented        : mips16 dsp mt
shadow register sets    : 1
kscratch registers      : 0
core                    : 1
VPE                     : 1
VCED exceptions         : not available
VCEI exceptions         : not available

[miao...@gmail.com]

Sounds good!

Could you have a test https://github.com/gin-gonic/gin on openwrt?

[Fino]

interesting! 

can I ask what's the real use case for Golang in a router?  

BR-fino 

在 2015年9月1日星期二 UTC+8下午3:31:15，Michal Wisler写道：

[miao...@gmail.com]

I want to have a try on high performance http server on OpenWrt with golang.

However, when I compile or run ,i found the golang depends on the eglibc, but my router uses uclibc, which do not officially support golang's runtime or lib. The patch will need a lot of work to do.

So I think Lua or C is better on OpenWrt before Google have a better support on MIPS.

在 2015年12月8日星期二 UTC+8上午10:10:12，Fino写道：

[Fino Meng]

I am thinking port Golang env to a x86_64 base mobilephone.

not started yet.

I didn't choose ARM phone because I think Golang's software may support x86_64 best.

BR-fino

--
You received this message because you are subscribed to a topic in the Google Groups "golang-nuts" group.
To unsubscribe from this topic, visit https://groups.google.com/d/topic/golang-nuts/Jz2QK2hvCac/unsubscribe.
To unsubscribe from this group and all its topics, send an email to golang-nuts...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.