On Sat, 12 Mar 2005 10:01:43 -0700 (MST), Zwane Mwaikambo
<[EMAIL PROTECTED]> wrote:
> On Wed, 9 Mar 2005, Francesco Oppedisano wrote:
>
> > On Tue, 8 Mar 2005 12:09:58 -0700 (MST), Zwane Mwaikambo
> > <[EMAIL PROTECTED]> wrote:
> >
> > > At some cpu frequency point on i386 the main cause of your
On Sat, 12 Mar 2005 10:01:43 -0700 (MST), Zwane Mwaikambo
[EMAIL PROTECTED] wrote:
On Wed, 9 Mar 2005, Francesco Oppedisano wrote:
On Tue, 8 Mar 2005 12:09:58 -0700 (MST), Zwane Mwaikambo
[EMAIL PROTECTED] wrote:
At some cpu frequency point on i386 the main cause of your interrupt
On Wed, 9 Mar 2005, Francesco Oppedisano wrote:
> On Tue, 8 Mar 2005 12:09:58 -0700 (MST), Zwane Mwaikambo
> <[EMAIL PROTECTED]> wrote:
>
> > At some cpu frequency point on i386 the main cause of your interrupt
> > service latency will be in the interrupt controller and how long from irq
> >
On Wed, 9 Mar 2005, Francesco Oppedisano wrote:
On Tue, 8 Mar 2005 12:09:58 -0700 (MST), Zwane Mwaikambo
[EMAIL PROTECTED] wrote:
At some cpu frequency point on i386 the main cause of your interrupt
service latency will be in the interrupt controller and how long from irq
assertion to
On Tue, 8 Mar 2005 12:09:58 -0700 (MST), Zwane Mwaikambo
<[EMAIL PROTECTED]> wrote:
> At some cpu frequency point on i386 the main cause of your interrupt
> service latency will be in the interrupt controller and how long from irq
> assertion to the signal being recognised, resultant vector being
On Tue, 8 Mar 2005 14:03:21 -0500 (EST), linux-os
> You can't measure interrupt latency that way even
> though you may get the "correct" answer!
Why do you think the technique is not valid?
> Make a simple module that uses IRQ7, the printer-port
> interrupt. Inside your ISR, you toggle one of
On Tue, 8 Mar 2005 14:03:21 -0500 (EST), linux-os
You can't measure interrupt latency that way even
though you may get the correct answer!
Why do you think the technique is not valid?
Make a simple module that uses IRQ7, the printer-port
interrupt. Inside your ISR, you toggle one of the
On Tue, 8 Mar 2005 12:09:58 -0700 (MST), Zwane Mwaikambo
[EMAIL PROTECTED] wrote:
At some cpu frequency point on i386 the main cause of your interrupt
service latency will be in the interrupt controller and how long from irq
assertion to the signal being recognised, resultant vector being
Hi Francesco,
On Tue, 8 Mar 2005, Francesco Oppedisano wrote:
> i'm trying to estimate the interrupt latency (time between hardware
> interrrupt and the start of the ISR) of a linux kernel 2.4.29 and i used
> a simple tecnique: inside the do_timer_interrupt i read the 8259 counter
> to obtain
On Tue, 8 Mar 2005, Francesco Oppedisano wrote:
Hi,
i'm trying to estimate the interrupt latency (time between hardware
interrrupt and the start of the ISR) of a linux kernel 2.4.29 and i
used a simple tecnique: inside the do_timer_interrupt i read the 8259
counter to obtain the elapsed time.
By
Hi,
i'm trying to estimate the interrupt latency (time between hardware
interrrupt and the start of the ISR) of a linux kernel 2.4.29 and i
used a simple tecnique: inside the do_timer_interrupt i read the 8259
counter to obtain the elapsed time.
By this mean i found a latency of about 6/7
Hi,
i'm trying to estimate the interrupt latency (time between hardware
interrrupt and the start of the ISR) of a linux kernel 2.4.29 and i
used a simple tecnique: inside the do_timer_interrupt i read the 8259
counter to obtain the elapsed time.
By this mean i found a latency of about 6/7
On Tue, 8 Mar 2005, Francesco Oppedisano wrote:
Hi,
i'm trying to estimate the interrupt latency (time between hardware
interrrupt and the start of the ISR) of a linux kernel 2.4.29 and i
used a simple tecnique: inside the do_timer_interrupt i read the 8259
counter to obtain the elapsed time.
By
Hi Francesco,
On Tue, 8 Mar 2005, Francesco Oppedisano wrote:
i'm trying to estimate the interrupt latency (time between hardware
interrrupt and the start of the ISR) of a linux kernel 2.4.29 and i used
a simple tecnique: inside the do_timer_interrupt i read the 8259 counter
to obtain the
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