Hello guys,
Urgently need your kind assistance!
While playing with time-syncing part of guestd I have faced the following
(mis?)behaviour of the block of code provided in the bottom (it is taken from
ToolsDaemon_SyncTime function).
I run it on VMWare 5.5.2 with SLED 10 Linux as a host and Fedora linux as a
guest.
What I see is:
1. this is always falling back to BDOOR_CMD_GETTIME case. Why? Is my
WMWare too old?
2. In the end I see that hostUsecs is always 0. What could be the reason?
BUT!!! I just made a test and discover that this two assignments (that are the
same for all 3 cases):
hostUsecs = bp.out.bx.word;
maxTimeLag = bp.out.cx.word;
in my case place something that looks _extremely_ like usecs from the host to
the maxTimeLag variable (Bug?)
I got rid of all the initialization in guestd, and call this routine right away
in int main(). Could this be the reason for this?
Really hope that you help me out. Thanks.
Sergey
----------------------------------------------------------------------------
Here comes the extract:
bp.in.cx.halfs.low = BDOOR_CMD_GETTIMEFULL_WITH_LAG;
Backdoor(&bp);
if (bp.out.ax.word == BDOOR_MAGIC) {
hostSecs = ((uint64)bp.out.si.word << 32) | bp.out.dx.word;
interruptLag = bp.out.di.word;
timeLagCall = TRUE;
Debug("Using BDOOR_CMD_GETTIMEFULL_WITH_LAG\n");
} else {
Debug("BDOOR_CMD_GETTIMEFULL_WITH_LAG not supported by current host,
attempting "
"BDOOR_CMD_GETTIMEFULL\n");
interruptLag = 0;
bp.in.cx.halfs.low = BDOOR_CMD_GETTIMEFULL;
Backdoor(&bp);
if (bp.out.ax.word == BDOOR_MAGIC) {
hostSecs = ((uint64)bp.out.si.word << 32) | bp.out.dx.word;
} else {
Debug("BDOOR_CMD_GETTIMEFULL not supported by current host, attempting
"
"BDOOR_CMD_GETTIME\n");
bp.in.cx.halfs.low = BDOOR_CMD_GETTIME;
Backdoor(&bp);
hostSecs = bp.out.ax.word;
}
}
hostUsecs = bp.out.bx.word;
maxTimeLag = bp.out.cx.word;
------------------------------------------------------------------------------
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