* 3.3-rc1 console lag (was: Re: [PATCH v8 00/20] OMAP2+: UART: Runtime adaptation + cleanup)
@ 2012-01-26 0:22 Ramirez Luna, Omar
2012-01-26 3:00 ` Paul Walmsley
0 siblings, 1 reply; 3+ messages in thread
From: Ramirez Luna, Omar @ 2012-01-26 0:22 UTC (permalink / raw)
To: Tony Lindgren, Kevin Hilman, Govindraj Raja
Cc: linux-omap, linux-serial, linux-arm-kernel, Partha Basak,
Vishwanath Sripathy, Rajendra Nayak, Santosh Shilimkar
Hi,
On Fri, Nov 11, 2011 at 3:57 AM, Govindraj.R <govindraj.raja@ti.com> wrote:
> Converting uart driver to adapt to pm runtime API's.
> Code re-org + cleanup.
> Moving some functionality from serial.c to omap-serial.c
...
>
> Ensure CONFIG_OMAP_PRM is set while testing irq_chaining with uart.
> And for pm_qos usage ensure CONFIG_CPU_IDLE is selected other wise
> console might be sluggish.
There is console lag for omap2plus_defconfig given that
CONFIG_CPU_IDLE is not enabled. Is the intention to force CPU_IDLE
into the defconfig or find an alternative for the new pm_qos when cpu
idle is disabled.
Seen on beagle-xm and 3.3-rc1.
Regards,
Omar
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: 3.3-rc1 console lag (was: Re: [PATCH v8 00/20] OMAP2+: UART: Runtime adaptation + cleanup)
2012-01-26 0:22 3.3-rc1 console lag (was: Re: [PATCH v8 00/20] OMAP2+: UART: Runtime adaptation + cleanup) Ramirez Luna, Omar
@ 2012-01-26 3:00 ` Paul Walmsley
2012-01-27 0:14 ` Ramirez Luna, Omar
0 siblings, 1 reply; 3+ messages in thread
From: Paul Walmsley @ 2012-01-26 3:00 UTC (permalink / raw)
To: Ramirez Luna, Omar
Cc: Tony Lindgren, Kevin Hilman, Govindraj Raja, linux-omap,
linux-serial, linux-arm-kernel, Partha Basak, Vishwanath Sripathy,
Rajendra Nayak, Santosh Shilimkar
On Wed, 25 Jan 2012, Ramirez Luna, Omar wrote:
> Hi,
>
> On Fri, Nov 11, 2011 at 3:57 AM, Govindraj.R <govindraj.raja@ti.com> wrote:
> > Converting uart driver to adapt to pm runtime API's.
> > Code re-org + cleanup.
> > Moving some functionality from serial.c to omap-serial.c
> ...
> >
> > Ensure CONFIG_OMAP_PRM is set while testing irq_chaining with uart.
> > And for pm_qos usage ensure CONFIG_CPU_IDLE is selected other wise
> > console might be sluggish.
>
> There is console lag for omap2plus_defconfig given that
> CONFIG_CPU_IDLE is not enabled. Is the intention to force CPU_IDLE
> into the defconfig or find an alternative for the new pm_qos when cpu
> idle is disabled.
>
> Seen on beagle-xm and 3.3-rc1.
Try this
http://marc.info/?l=linux-arm-kernel&m=132754676814391&w=2
- Paul
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: 3.3-rc1 console lag (was: Re: [PATCH v8 00/20] OMAP2+: UART: Runtime adaptation + cleanup)
2012-01-26 3:00 ` Paul Walmsley
@ 2012-01-27 0:14 ` Ramirez Luna, Omar
0 siblings, 0 replies; 3+ messages in thread
From: Ramirez Luna, Omar @ 2012-01-27 0:14 UTC (permalink / raw)
To: Paul Walmsley
Cc: Kevin Hilman, Tony Lindgren, Rajendra Nayak, Partha Basak,
Govindraj Raja, Santosh Shilimkar, linux-serial,
Vishwanath Sripathy, linux-omap, linux-arm-kernel
Hi Paul,
On Wed, Jan 25, 2012 at 9:00 PM, Paul Walmsley <paul@pwsan.com> wrote:
...
>> > Ensure CONFIG_OMAP_PRM is set while testing irq_chaining with uart.
>> > And for pm_qos usage ensure CONFIG_CPU_IDLE is selected other wise
>> > console might be sluggish.
>>
>> There is console lag for omap2plus_defconfig given that
>> CONFIG_CPU_IDLE is not enabled. Is the intention to force CPU_IDLE
>> into the defconfig or find an alternative for the new pm_qos when cpu
>> idle is disabled.
>>
>> Seen on beagle-xm and 3.3-rc1.
>
> Try this
>
> http://marc.info/?l=linux-arm-kernel&m=132754676814391&w=2
I tried the series and the console returned to normal, I can confirm
that the following patch helps:
tty: serial: OMAP: use a 1-byte RX FIFO threshold in PIO mode
Thanks,
Omar
^ permalink raw reply [flat|nested] 3+ messages in thread
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2012-01-26 0:22 3.3-rc1 console lag (was: Re: [PATCH v8 00/20] OMAP2+: UART: Runtime adaptation + cleanup) Ramirez Luna, Omar
2012-01-26 3:00 ` Paul Walmsley
2012-01-27 0:14 ` Ramirez Luna, Omar
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