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Re: [Xen-devel] [PATCH 1/5] xentrace_format: print timestamps in nanoseconds
- To: Andrii Anisov <andrii_anisov@xxxxxxxx>, Andrii Anisov <andrii.anisov@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxx>
- From: George Dunlap <george.dunlap@xxxxxxxxxx>
- Date: Tue, 11 Sep 2018 11:45:32 +0100
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- Cc: George Dunlap <george.dunlap@xxxxxxxxxxxxx>, Wei Liu <wei.liu2@xxxxxxxxxx>, Ian Jackson <ian.jackson@xxxxxxxxxxxxx>, Dario Faggioli <dfaggioli@xxxxxxxx>
- Delivery-date: Tue, 11 Sep 2018 10:45:46 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 09/11/2018 11:44 AM, George Dunlap wrote:
> On 09/11/2018 11:32 AM, Andrii Anisov wrote:
>> Hello George,
>>
>>
>> On 11.09.18 13:15, George Dunlap wrote:
>>>> if mhz:
>>>> - tsc = tsc / (mhz*1000000.0)
>>>> + tsc = tsc * 1000.0 / mhz
>>> Why do you prefer this?
>> I'm playing with scheduling from one hand, so time stamps in seconds
>> does not give understanding about what's going on.
>> From other hand I'm quite confused about how useful timestamps in
>> seconds could be for traces. As per my understanding, tracer should be
>> useful for debugging some rapidly changing processes.
>
> Oh, sorry -- I missed the point of this patch.
>
> ---
> xentrace_format: print timestamps in nanoseconds
>
> ...rather than seconds.
This should rather say, "..rather than seconds, when the clock speed is
specified."
-George
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