From: Chao Gao <chao.gao@intel.com>
To: xen-devel@lists.xen.org, George Dunlap <George.Dunlap@eu.citrix.com>
Subject: Re: encounter a problem about xenalyze
Date: Tue, 23 May 2017 17:49:25 +0800 [thread overview]
Message-ID: <20170523094923.GA14837@skl-2s3> (raw)
In-Reply-To: <20170519105338.GA31359@skl-2s3.sh.intel.com>
On Fri, May 19, 2017 at 06:53:39PM +0800, Chao Gao wrote:
>Hi, George.
>
>Per your suggesion, I tried to add some code to xenalyze.c to analyze
>some newly added events. To have more understanding, you can read the
>patch at the bottom. In this patch, I try to count how many times a
>given vcpu is added and removed from a pi blocking list. After
>collecting some data, I compared the result of different decoder,
>xenalyze and xentrace_format. I found that xentrace_format shows
>one vcpu is added and removed 2499 times respectively. But xenalyze
>shows the identical vcpu is added 2499 times and removed only about
>700 times. Some other vcpus also encounter this weird thing.
Hi, George. I found the cause. It is for removing one vcpu from
pi blocking list can happen in various contexts. Some contexts
can't pass toplevel_assert_check().
Thanks
Chao
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prev parent reply other threads:[~2017-05-23 9:49 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-19 10:53 encounter a problem about xenalyze Chao Gao
2017-05-23 9:49 ` Chao Gao [this message]
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