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To:     <lingshan.zhu@intel.com>, <like.xu.linux@gmail.com>
References: <20210716085325.10300-1-lingshan.zhu@intel.com>
Subject: Re: [PATCH V8 00/18] KVM: x86/pmu: Add *basic* support to enable
 guest PEBS via DS
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From:   Liuxiangdong <liuxiangdong5@huawei.com>
Message-ID: <60F96A3F.3030703@huawei.com>
Date:   Thu, 22 Jul 2021 20:53:19 +0800
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Hi，like and lingshan.

We can use pebs on the Icelake by using "perf record -e $event:pp", but 
how can we get all the supported $event for the Icelake?
Because it seems like that all the hardware event/software event/kernel 
pmu event listed by "perf list" can use ":pp" without error.


By quering events list for Icelake("https://perfmon-events.intel.com/), 
we can use "perf record -e cpu/event=0xXX,unask=0xXX/pp"
to enable sampling. There are some events with "PEBS： 
[PreciseEventingIP]" in "Additional Info" column. Are they the only 
supported
precise events? Do those events which have "PEBS:[NonPreciseEventingIP]" 
in last column support PEBS?


Thanks,
Xiangdong Liu