From: David Hunt <david.hunt@intel.com>
To: Thomas Monjalon <thomas@monjalon.net>
Cc: <dev@dpdk.org>
Subject: Re: [PATCH] lib/power: power pmd errata with RTM and gcc-9
Date: Tue, 22 Mar 2022 16:11:36 +0000 [thread overview]
Message-ID: <d60817bc-167a-2c15-23e3-914dcc304305@intel.com> (raw)
In-Reply-To: <4149792.kQq0lBPeGt@thomas>
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@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.
prev parent reply other threads:[~2022-03-22 16:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-09 13:22 David Hunt
2022-03-16 19:44 ` Thomas Monjalon
2022-03-22 16:11 ` David Hunt [this message]
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