On Thu, 23 Mar 2017, Pasha Tatashin wrote:
> I will add a condition to tsc_early_init() to check for TSC_ADJUST if it is
> not 0, disable early TSC feature. Does this sound OK?
Not really.
I have strong objections against how this is crammed into the early boot
process along with the code
On Thu, 23 Mar 2017, Pasha Tatashin wrote:
> I will add a condition to tsc_early_init() to check for TSC_ADJUST if it is
> not 0, disable early TSC feature. Does this sound OK?
Not really.
I have strong objections against how this is crammed into the early boot
process along with the code
Hi Thomas,
Thank you very much for looking at this patchset. Comments below:
On 03/23/2017 06:56 AM, Thomas Gleixner wrote:
On Wed, 22 Mar 2017, Pasha Tatashin wrote:
Yes, I am certain it is 0 or near 0 on reset on this machine. Because, I
Emphasis on "this machine'
It's not guaranteed
Hi Thomas,
Thank you very much for looking at this patchset. Comments below:
On 03/23/2017 06:56 AM, Thomas Gleixner wrote:
On Wed, 22 Mar 2017, Pasha Tatashin wrote:
Yes, I am certain it is 0 or near 0 on reset on this machine. Because, I
Emphasis on "this machine'
It's not guaranteed
On Wed, 22 Mar 2017, Pasha Tatashin wrote:
> Yes, I am certain it is 0 or near 0 on reset on this machine. Because, I
Emphasis on "this machine'
It's not guaranteed especially not on reboot and not with creative BIOSes
fiddling with the TSC_ADJUST value.
- It CANNOT be used to measure BIOS
On Wed, 22 Mar 2017, Pasha Tatashin wrote:
> Yes, I am certain it is 0 or near 0 on reset on this machine. Because, I
Emphasis on "this machine'
It's not guaranteed especially not on reboot and not with creative BIOSes
fiddling with the TSC_ADJUST value.
- It CANNOT be used to measure BIOS
On 2017-03-22 16:27, Peter Zijlstra wrote:
On Wed, Mar 22, 2017 at 04:24:16PM -0400, Pavel Tatashin wrote:
Last week I sent out patches to enable early boot time stamp on SPARC, that
work is now under review:
http://www.spinics.net/lists/sparclinux/msg17372.html
This is continuation for that
On 2017-03-22 16:27, Peter Zijlstra wrote:
On Wed, Mar 22, 2017 at 04:24:16PM -0400, Pavel Tatashin wrote:
Last week I sent out patches to enable early boot time stamp on SPARC, that
work is now under review:
http://www.spinics.net/lists/sparclinux/msg17372.html
This is continuation for that
Hi Peter,
Thank you for looking at this patchset.
Yes, I am certain it is 0 or near 0 on reset on this machine. Because,
I actually wondered about it, and used stop watch as an alternative way
to verify the result, twice.
While, I suspect it is often the case that on reset tsc is 0, it is
Hi Peter,
Thank you for looking at this patchset.
Yes, I am certain it is 0 or near 0 on reset on this machine. Because,
I actually wondered about it, and used stop watch as an alternative way
to verify the result, twice.
While, I suspect it is often the case that on reset tsc is 0, it is
On Wed, Mar 22, 2017 at 04:24:16PM -0400, Pavel Tatashin wrote:
> Last week I sent out patches to enable early boot time stamp on SPARC, that
> work is now under review:
> http://www.spinics.net/lists/sparclinux/msg17372.html
>
> This is continuation for that work, but adding early boot time
On Wed, Mar 22, 2017 at 04:24:16PM -0400, Pavel Tatashin wrote:
> Last week I sent out patches to enable early boot time stamp on SPARC, that
> work is now under review:
> http://www.spinics.net/lists/sparclinux/msg17372.html
>
> This is continuation for that work, but adding early boot time
On Wed, Mar 22, 2017 at 04:24:16PM -0400, Pavel Tatashin wrote:
> - early tsc offset is 549s, so it took over 9 minutes to get through POST,
> and GRUB before starting linux
Lol, how cute. You assume TSC starts at 0 on reset.
On Wed, Mar 22, 2017 at 04:24:16PM -0400, Pavel Tatashin wrote:
> - early tsc offset is 549s, so it took over 9 minutes to get through POST,
> and GRUB before starting linux
Lol, how cute. You assume TSC starts at 0 on reset.
Last week I sent out patches to enable early boot time stamp on SPARC, that
work is now under review:
http://www.spinics.net/lists/sparclinux/msg17372.html
This is continuation for that work, but adding early boot time stamps
support for x86 machines.
Here is example how this information is
Last week I sent out patches to enable early boot time stamp on SPARC, that
work is now under review:
http://www.spinics.net/lists/sparclinux/msg17372.html
This is continuation for that work, but adding early boot time stamps
support for x86 machines.
Here is example how this information is
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