[#4241] rarely, gettimeoffset() return backword time in 2008R1-SMP kernel

Submitted By: Graf Yang

Open Date

2008-07-15 03:45:59 Close Date

2008-08-04 03:41:40

Priority:

Medium Assignee:

Graf Yang

Status:

Closed Fixed In Release:

N/A

Found In Release:

N/A Release:

Category:

Kernel Functions Board:

EZKIT Lite

Processor:

BF561 Silicon Revision:

Is this bug repeatable?:

Yes Resolution:

Out of Date

Uboot version or rev.:

Toolchain version or rev.:

App binary format:

N/A

Summary: rarely, gettimeoffset() return backword time in 2008R1-SMP kernel

Details:

gettimeoffset() return a value between 100-200 (250Hz, 4000us per tick), but the jiffies has not increased by 1 compare to the last call, the cause is ILAT for core timer bit maybe read as 0. As so far, don't know the reason.

Follow-ups

--- Graf Yang 2008-08-04 03:41:39

In SMP kernel, with earch core timer be used, I use printk found this rarely

issue, now the SMP kernel changed to use the gptimer0 as the tick source, so

this bug has out of date.

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