Re: [Linuxptp-users] phc2sys[273995.639]: failed to read clock: Invalid argument

[Pham, C. <Cal...@ne...>]

Richard,
We are running Fedora Core 16, and glibc-2.14.90-24.fc16.9.x86_64.
Thank you for your help! Now we understand why and take the next step.

Calvin

-----Original Message-----
From: Richard Cochran [mailto:ric...@gm...] 
Sent: Tuesday, March 04, 2014 11:18 AM
To: Pham, Calvin
Cc: lin...@li...
Subject: Re: [Linuxptp-users] phc2sys[273995.639]: failed to read clock: Invalid argument

On Tue, Mar 04, 2014 at 03:48:57PM +0000, Pham, Calvin wrote:
> Calvin> output of strace
> strace ./testptp -d /dev/ptp0 -g

...

> clock_gettime(0xffffffe3 /* CLOCK_??? */, {1393947888, 731912808}) = 0

The kernel returns zero.

> Calvin> Here is output of ltrace
> 
> [root@V4-CALVIN ptptest]# ltrace ./testptp -d /dev/ptp0 -g

...

> clock_gettime(0xffffffdb, 0x7fff7d779690, 0x7fff7d779690, -1, 0)                                = 0xffffffff

But your C library returns -1.

This is a bug in your C library.

What distro and C library are you using?

Thanks,
Richard