matrix_df hotmail wrote: > Hello > > >> >> matrix_df hotmail wrote: >> > Hello Jan >> > >> > Just a question to your output of your test program >> >> cycle #3500, time 1155262131.598494530 s, offset 3309740011269 ns >> > >> > Is the time printed the exact cycle time on local host or the output of >> > a gettime function (which one)? >> >> See the example code: its the local time + the master clock offset. > Which example code? > Can I read t he offset from user mode? How? > >> >> > How can I get the the exact time of a cycle start? >> >> Mmm, only by extending rtmac_waitinfo so that this value is returned as >> well. Is this data only informative for you or do you plan to derive >> some application functionality from it? > To know the exact start of a cycle would be good to caculate the time > the xmit thread must be started > earlier to send data within the same cycle. > It would be also valueable for profiling. > >> >> > Is the output of the offset from a call to >> > ioctl_rt(tdma, RTMAC_RTIOC_TIMEOFFSET, &time_offset) ? >> > >> >> That's the offset between master and slave clock for this cycle. It says >> nothing about he cycle start. > I know. > >> Jan > > Jochen > >
I just committed another round of modifications to that API, see latest
SVN. You now have this waitinfo:
struct rtmac_waitinfo {
unsigned int type;
size_t size;
unsigned long cycle_no;
uint64_t cycle_start;
int64_t clock_offset;
};
I think this makes RTMAC_RTIOC_WAITONCYCLE_EX a bit more useful (and
that there are no users relying on the ABI is obvious given the bugs you
found). See also updated examples/xenomai/native/tdma-api.c for the usage.
The modification is only tested on a master so far. This leaves you a
chance to find some bugs. ;)
HTH,
Jan
signature.asc
Description: OpenPGP digital signature
------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
_______________________________________________ RTnet-users mailing list RTnet-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/rtnet-users
