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Date: Thu, 16 Feb 2023 20:56:55 +0000
From: Liang Ma <liangma@liangbit.com>
To: Tomasz Duszynski <tduszynski@marvell.com>
Cc: dev@dpdk.org, thomas@monjalon.net, jerinj@marvell.com,
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Subject: Re: [PATCH v5 0/4] add support for self monitoring
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Errors-To: dev-bounces@dpdk.org

PMU is kind of MSR. Precisely , that's MSR per core. 
All MSR reading will lead to IPI(Please reference the kernel
implementation of MSR driver). The IPI will disturb the DPDK application
because the userspace/kernel context switch, which has impact to the
tail latency.