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

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[#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Out of Date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this bug has out of date.

 

 

 

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