[PATCH] lib/power: power pmd errata with RTM and gcc-9

[David Hunt]

On 16/3/2022 7:44 PM, Thomas Monjalon wrote:
> 09/03/2022 14:22, David Hunt:
>> An errata exists where users may see reduced power savings when using
>> PMD Power Management. This issue occurs when compiling DPDK applications
>> with gcc-9 on platforms with TSX enabled. In rte_power_monitor_multi(),
>> the function may return without successfully starting the RTM
>> transaction (the _xbegin() fails).
>>
>> Signed-off-by: David Hunt <david.hunt at intel.com>
> Applied, thanks.
>
> Is there a way to fix it or should we keep this errata forever?


If it's a gcc-9 issue, then we'll have to get the assistance to fix. 
I've send the relevant information on to the gcc folks for analysis, and 
I'll follow up at regular intervals.

I would hope to be able to remove the errata within the next one or two 
releases.