Re: [RTnet-developers] bug: log file isn't written

[Karl R. <Kar...@gm...>]

Jan Kiszka wrote:
> Karl Reichert wrote:
> > Jan Kiszka wrote:
> >> Karl Reichert wrote:
> >>> Jan Kiszka wrote:
> >>>> Karl Reichert wrote:
> >>>>> Hi,
> >>>>>
> >>>>> found sth, looks like a bug: When using 'tdmacfg rteth0 slot 0 100
> -s
> >>>> 100 -l rtnet.log' I do not get any logfile.
> >>>>
> >>>> Everything is possible given that this features was never intensively
> >>>> used AFAIK (at least by myself). I do remember it once worked - right
> >>>> after I implemented it.
> >>>>
> >>>> Just to double-check: That tdmacfg command is the first one issued
> >> after
> >>>> "tdmacfg rteth0 master/slave", isn't it?
> >>>>
> >>>> Jan
> >>>>
> >>> Yes it is. Searched whole / for rtnet.log, nothing is there. But from
> a
> >> quick look at sourcecode of tdmacfg I can't find any reason why it
> doesn't
> >> works.
> >>
> >> [It's a shame, but I'm lacking a test environment...]
> >> Please collect an "strace" dump of the related tdmacfg run. Let's see
> if
> >> that already gives some hints. Next step would then be gdb/ddd.
> >>
> >> Jan
> >>
> > 
> > Hi Jan,
> > 
> > See below for strace log. Seems like it doesn't even tries to open a
> file:
> > 
> > 
> > 
> > root@rtnet:/usr/local/rtnet/sbin# strace ./tdmacfg rteth0 slot 0 100 -s
> 100 -l rtnet.log
> > execve("./tdmacfg", ["./tdmacfg", "rteth0", "slot", "0", "100", "-s",
> "100", "-l", "rtnet.log"], [/* 34 vars */]) = 0
> > brk(0)                                  = 0x804b000
> > access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or
> directory)
> > mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
> 0) = 0xb7f85000
> > access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or
> directory)
> > open("/etc/ld.so.cache", O_RDONLY)      = 3
> > fstat64(3, {st_mode=S_IFREG|0644, st_size=34837, ...}) = 0
> > mmap2(NULL, 34837, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7f7c000
> > close(3)                                = 0
> > access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or
> directory)
> > open("/lib/tls/i686/cmov/libc.so.6", O_RDONLY) = 3
> > read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\0`\1\000"...,
> 512) = 512
> > fstat64(3, {st_mode=S_IFREG|0644, st_size=1307104, ...}) = 0
> > mmap2(NULL, 1312164, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,
> 0) = 0xb7e3b000
> > mmap2(0xb7f76000, 12288, PROT_READ|PROT_WRITE,
> MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x13b) = 0xb7f76000
> > mmap2(0xb7f79000, 9636, PROT_READ|PROT_WRITE,
> MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb7f79000
> > close(3)                                = 0
> > mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
> 0) = 0xb7e3a000
> > set_thread_area({entry_number:-1 -> 6, base_addr:0xb7e3a6c0,
> limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1,
> seg_not_present:0, useable:1}) = 0
> > mprotect(0xb7f76000, 4096, PROT_READ)   = 0
> > munmap(0xb7f7c000, 34837)               = 0
> > open("/dev/rtnet", O_RDWR)              = 3
> > ioctl(3, NCP_IOC_GETMOUNTUID, 0x804a760) = 0
> 
> This is TDMA_IOC_CAL_RESULT_SIZE, the command to calculate the expected
> size of the log file. It returns 0, and that can only mean that TDMA
> considers the addressed Ethernet device as already calibrated. Possible
> reasons:
>  - some "slot" command was already issued on the device
>  - device is configured as (primary) master

Bingo, that's the case. I run '/usr/local/rtnet/sbin/tdmacfg rteth0 master 10000 -i 1' before ...

But still I don't get it: with above command I just start the master, to assign a send slot, I also have to assign a slot. Can't I get a log for this?

Karl
-- 
von Karl Reichert

Der GMX SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! 
Ideal für Modem und ISDN: http://www.gmx.net/de/go/smartsurfer