* PCI latency
@ 2003-03-28 23:08 Giuliano Pochini
2003-03-28 23:54 ` Jan "Evil Twin" Depner
0 siblings, 1 reply; 8+ messages in thread
From: Giuliano Pochini @ 2003-03-28 23:08 UTC (permalink / raw)
To: alsa-devel
The documentation of my card says I should set pci latency to 0xC0. What
is that latency ? How do I change it ?
Bye.
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^ permalink raw reply [flat|nested] 8+ messages in thread
* PCI: latency
@ 2021-12-03 17:00 ` Subhashini Rao Beerisetty
0 siblings, 0 replies; 8+ messages in thread
From: Subhashini Rao Beerisetty @ 2021-12-03 17:00 UTC (permalink / raw)
To: linux-pci, LKML, kernelnewbies
[ Please keep me in CC as I'm not subscribed to the list]
Hi all,
We are using the Linux OS on an x86_64 machine. I need to measure the
PCIe latency on my system, does kernel have any latency measurement
module for the PCIe bus?
Thanks,
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Kernelnewbies mailing list
Kernelnewbies@kernelnewbies.org
https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
^ permalink raw reply [flat|nested] 8+ messages in thread
* PCI: latency
@ 2021-12-03 17:00 ` Subhashini Rao Beerisetty
0 siblings, 0 replies; 8+ messages in thread
From: Subhashini Rao Beerisetty @ 2021-12-03 17:00 UTC (permalink / raw)
To: linux-pci, LKML, kernelnewbies
[ Please keep me in CC as I'm not subscribed to the list]
Hi all,
We are using the Linux OS on an x86_64 machine. I need to measure the
PCIe latency on my system, does kernel have any latency measurement
module for the PCIe bus?
Thanks,
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: PCI: latency
2021-12-03 17:00 ` Subhashini Rao Beerisetty
@ 2021-12-04 8:18 ` Greg KH
-1 siblings, 0 replies; 8+ messages in thread
From: Greg KH @ 2021-12-04 8:18 UTC (permalink / raw)
To: Subhashini Rao Beerisetty; +Cc: linux-pci, LKML, kernelnewbies
On Fri, Dec 03, 2021 at 10:30:58PM +0530, Subhashini Rao Beerisetty wrote:
> [ Please keep me in CC as I'm not subscribed to the list]
>
> Hi all,
>
> We are using the Linux OS on an x86_64 machine. I need to measure the
> PCIe latency on my system, does kernel have any latency measurement
> module for the PCIe bus?
How exactly are you going to define PCIe latency?
And what is this going to be used for?
thanks,
greg k-h
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Kernelnewbies mailing list
Kernelnewbies@kernelnewbies.org
https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: PCI: latency
@ 2021-12-04 8:18 ` Greg KH
0 siblings, 0 replies; 8+ messages in thread
From: Greg KH @ 2021-12-04 8:18 UTC (permalink / raw)
To: Subhashini Rao Beerisetty; +Cc: linux-pci, LKML, kernelnewbies
On Fri, Dec 03, 2021 at 10:30:58PM +0530, Subhashini Rao Beerisetty wrote:
> [ Please keep me in CC as I'm not subscribed to the list]
>
> Hi all,
>
> We are using the Linux OS on an x86_64 machine. I need to measure the
> PCIe latency on my system, does kernel have any latency measurement
> module for the PCIe bus?
How exactly are you going to define PCIe latency?
And what is this going to be used for?
thanks,
greg k-h
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: PCI: latency
2021-12-03 17:00 ` Subhashini Rao Beerisetty
@ 2021-12-06 19:39 ` Bjorn Helgaas
-1 siblings, 0 replies; 8+ messages in thread
From: Bjorn Helgaas @ 2021-12-06 19:39 UTC (permalink / raw)
To: Subhashini Rao Beerisetty; +Cc: linux-pci, LKML, kernelnewbies
On Fri, Dec 03, 2021 at 10:30:58PM +0530, Subhashini Rao Beerisetty wrote:
> [ Please keep me in CC as I'm not subscribed to the list]
>
> Hi all,
>
> We are using the Linux OS on an x86_64 machine. I need to measure the
> PCIe latency on my system, does kernel have any latency measurement
> module for the PCIe bus?
No, unfortunately not. Maybe perf could help, but I don't know enough
to give you any pointers.
There are a couple tune/trace things like [1], but they're specific to
hardware that you're probably not using.
[1] https://lore.kernel.org/r/20211116090625.53702-1-yangyicong@hisilicon.com
_______________________________________________
Kernelnewbies mailing list
Kernelnewbies@kernelnewbies.org
https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: PCI: latency
@ 2021-12-06 19:39 ` Bjorn Helgaas
0 siblings, 0 replies; 8+ messages in thread
From: Bjorn Helgaas @ 2021-12-06 19:39 UTC (permalink / raw)
To: Subhashini Rao Beerisetty; +Cc: linux-pci, LKML, kernelnewbies
On Fri, Dec 03, 2021 at 10:30:58PM +0530, Subhashini Rao Beerisetty wrote:
> [ Please keep me in CC as I'm not subscribed to the list]
>
> Hi all,
>
> We are using the Linux OS on an x86_64 machine. I need to measure the
> PCIe latency on my system, does kernel have any latency measurement
> module for the PCIe bus?
No, unfortunately not. Maybe perf could help, but I don't know enough
to give you any pointers.
There are a couple tune/trace things like [1], but they're specific to
hardware that you're probably not using.
[1] https://lore.kernel.org/r/20211116090625.53702-1-yangyicong@hisilicon.com
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2021-12-06 19:40 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2003-03-28 23:08 PCI latency Giuliano Pochini
2003-03-28 23:54 ` Jan "Evil Twin" Depner
-- strict thread matches above, loose matches on Subject: below --
2021-12-03 17:00 PCI: latency Subhashini Rao Beerisetty
2021-12-03 17:00 ` Subhashini Rao Beerisetty
2021-12-04 8:18 ` Greg KH
2021-12-04 8:18 ` Greg KH
2021-12-06 19:39 ` Bjorn Helgaas
2021-12-06 19:39 ` Bjorn Helgaas
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