tcpdump mailing list archives
Re: DLT_ request
From: Scott Deandrea <sdeandrea () apple com>
Date: Thu, 05 Jan 2017 23:31:32 -0800
Yes, you can think of the lower bits the frame number and the upper bits the number of overflows. There isn’t any reason to interpret it as anything other than a 64-bit integer nor to specify the division. —scott
On Jan 5, 2017, at 10:35 PM, Guy Harris <guy () alum mit edu> wrote: On Jan 5, 2017, at 10:11 PM, Scott Deandrea <sdeandrea () apple com> wrote:An interrupt is generated when the frame number rolls over and we use this to increment the upper bits so the frame number can grow beyond 11 bits. This allows software consuming the frame number not to worry about the frame wrap when scheduling isochronous I/O.So the lower 11 bits are the frame number and the upper bits are, in effect, a count of frame number overflows. Is there any reason to interpret it as anything other than a 64-bit integer, or to specify that division in the spec for the format?
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Current thread:
- Re: DLT_ request, (continued)
- Re: DLT_ request Guy Harris (Jan 07)
- Re: DLT_ request Scott Deandrea (Jan 08)
- Re: DLT_ request Guy Harris (Jan 05)
- Re: DLT_ request Scott Deandrea (Jan 05)
- Re: DLT_ request Guy Harris (Jan 05)
- Re: DLT_ request Scott Deandrea (Jan 05)
- Re: DLT_ request Scott Deandrea (Jan 05)
- Re: DLT_ request Guy Harris (Jan 05)
- Re: DLT_ request Scott Deandrea (Jan 05)
- Re: DLT_ request Guy Harris (Jan 05)
- Re: DLT_ request Scott Deandrea (Jan 05)
- Re: DLT_ request Scott Deandrea (Jan 05)
- Re: DLT_ request Guy Harris (Jan 05)
- Re: DLT_ request Scott Deandrea (Jan 05)
- Re: DLT_ request Guy Harris (Jan 06)
- Re: DLT_ request Scott Deandrea (Jan 06)
- Re: DLT_ request Scott Deandrea (Jan 08)