I know what rcu is and the synchronization mechanism. I am trying to
understand struct rcu_dynticks and what this "rcu_exit_nohz" does in
irq_enter context. Is this something related hrtimers. please clarify,
thanks.
Regards,
Sri
Thanks,
Sri.
On Thu, Sep 16, 2010 at 7:56 PM, Dave Hylands wrote:
Hi Sri,
On Thu, Sep 16, 2010 at 2:29 PM, Sri Ram Vemulpali
wrote:
> Hi Guys,
> I got stuck at a function to understand which is called in irq_enter
> context.
> This function is rcu_exit_nohz();
> I know rcu is read-copy-update locking mechanism to provide light
> weight locking
Hi Guys,
I got stuck at a function to understand which is called in irq_enter
context.
This function is rcu_exit_nohz();
I know rcu is read-copy-update locking mechanism to provide light
weight locking
to synchronize readers and writers.
So now the question is what t
Hi...
On Fri, Sep 10, 2010 at 21:58, mohit verma wrote:
> hi guys,
> this may be out of the topic but it stuck me at this stage so i am asking.
perhaps better if you start new thread, with subject like " blah blah
(was: blah blah)" :)
> i read that interrupt handler names start from do_X
hi guys,
this may be out of the topic but it stuck me at this stage so i am asking.
i read that interrupt handler names start from do_X but what about __do
_X.
i mean, what do they show?
rupted task was switched
> out and scheduler recognizes a softirq was pending. I know that ksoftirqd is
> responsible to execute all pending softirqs , who will invoke this, and for
> every periodic time ksoftirqd invokes and executes softirq. Can you please
> explain. Thanks.
Upon
Hi Sri,
Replying to the list this time...
On Thu, Sep 9, 2010 at 9:58 PM, Sri Ram Vemulpali
wrote:
> Hi Dave,
> Thanks for explanation, but is there any delay between interrupt handler
> and softirq execution. Suppose say INT7 triggered and its handler got
> executed. Now this handler raised th
Hi Dave,
Thanks for explanation, but is there any delay between interrupt handler
and softirq execution. Suppose say INT7 triggered and its handler got
executed. Now this handler raised the softirq and finished its interrupt
context. Since interrupts preempts the current running task, after finis
Hi Sri,
Replying to the list...
On Thu, Sep 9, 2010 at 5:08 PM, Sri Ram Vemulpali wrote:
> Hi,
> Can any one explain, when interrupt handler schedules softirq, for bottom
> half work, when is that softirq is executed. Is it immediately after
> interrupt handler context or after some time later wh
Hi,
Can any one explain, when interrupt handler schedules softirq, for bottom
half work, when is that softirq is executed. Is it immediately after
interrupt handler context or after some time later when scheduler was
invoked.
I am trying to understand execution context of BHs. I know that tasklet
thanks to all
On Thu, Sep 9, 2010 at 8:16 AM, Bond wrote:
>
>
> On Thu, Sep 9, 2010 at 1:10 PM, Dave Hylands wrote:
>
>> Well, check your CPU usage. It's probably less than 100%. Let's say
>> it's at 46%. That means that the system is spending 54% of its time
>> "doing nothing" or being idle.
>
On Thu, Sep 9, 2010 at 1:10 PM, Dave Hylands wrote:
> Well, check your CPU usage. It's probably less than 100%. Let's say
> it's at 46%. That means that the system is spending 54% of its time
> "doing nothing" or being idle.
>
> From a macroscopic level, it looks like the CPU is busy. But from a
Hi,
On Thu, Sep 9, 2010 at 12:00 AM, Bond wrote:
>
>
> On Thu, Sep 9, 2010 at 12:04 PM, Dave Hylands wrote:
>>
>> The kernel has the notion of "going idle". This happens whenever there
>> is nothing to do.
>
> Hi Dave from your message I want to ask going idle suppose I am having a
> Linux box o
On Thu, Sep 9, 2010 at 14:00, Bond wrote:
> Hi Dave from your message I want to ask going idle suppose I am having a
> Linux box on my system.
> Then display manager,polling and other things are constantly happening which
> are being handled by the CPU so when does
> the kernel goes idle I am not
On Thu, Sep 9, 2010 at 12:04 PM, Dave Hylands wrote:
>
> The kernel has the notion of "going idle". This happens whenever there
> is nothing to do.
Hi Dave from your message I want to ask going idle suppose I am having a
Linux box on my system.
Then display manager,polling and other things are c
Hi Sri,
On Wed, Sep 8, 2010 at 9:14 AM, Sri Ram Vemulpali
wrote:
> Hi All,
> Can anyone help me to understand what "exit_idle()" function does.
The kernel has the notion of "going idle". This happens whenever there
is nothing to do. The kernel will enter idle mode, and when some
interrupt occu
Can anyone please explain what irq_enter function does which is called from
do_irq.
Thanks.
Sri.
Hi All,
Can anyone help me to understand what "exit_idle()" function does.
I am trying to understand the whole process of do_IRQ.
Can anyone point to how APIC protocol works and brief view of process
before do_IRQ.
Thanks,
Sri.
18 matches
Mail list logo
