Linus Torvalds writes:
> On Wed, Aug 10, 2016 at 5:11 PM, Huang, Ying wrote:
>>
>> Here is the comparison result with perf-profile data.
>
> Heh. The diff is actually harder to read than just showing A/B
> state.The fact that the call chain shows up as part of the symbol
> makes it even more so.
On Wed, Aug 10, 2016 at 5:11 PM, Huang, Ying wrote:
>
> Here is the comparison result with perf-profile data.
Heh. The diff is actually harder to read than just showing A/B
state.The fact that the call chain shows up as part of the symbol
makes it even more so.
For example:
> 0.00 ± -1%
"Huang, Ying" writes:
> Hi, Linus,
>
> Linus Torvalds writes:
>
>> On Wed, Aug 10, 2016 at 4:08 PM, Dave Chinner wrote:
>>>
>>> That, to me, says there's a change in lock contention behaviour in
>>> the workload (which we know aim7 is good at exposing). i.e. the
>>> iomap change shifted content
Hi, Linus,
Linus Torvalds writes:
> On Wed, Aug 10, 2016 at 4:08 PM, Dave Chinner wrote:
>>
>> That, to me, says there's a change in lock contention behaviour in
>> the workload (which we know aim7 is good at exposing). i.e. the
>> iomap change shifted contention from a sleeping lock to a spinn
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