From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Vagin <avagin@gmail.com>
Subject: Re: Trouble parsing trace events
Date: Wed, 23 Nov 2011 11:03:52 +0400
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To: Arun Sharma <asharma@fb.com>
Cc: linux-perf-users@vger.kernel.org, David Ahern <dsahern@gmail.com>

Hello Arun,

This bug was fixed already, but the commit isn't in Linus's tree yet.
http://git.kernel.org/?p=linux/kernel/git/tip/tip.git;a=commit;h=49908a1b25d448d68fd26faca260e1850201575f

On 11/23/2011 10:51 AM, Arun Sharma wrote:
>
> I'm using a 3.2-rc1 based kernel and perf userspace built from 
> tip/auto-latest (commit id e471db8) + Andrew Vagin's sleep profiling 
> patches.
>
> # perf record -agT -e sched:sched_switch -F 100 -- sleep 3
> [ perf record: Woken up 9 times to write data ]
> [ perf record: Captured and wrote 4.044 MB perf.data (~176664 samples) ]
>
> # perf script
>   Warning: Error: expected type 5 but read 4
>   Warning: Error: expected type 4 but read 0
>   Fatal: bad op token {
>
> Is there a known incompatibility between kernel and userspace that 
> could explain this?
>
> I don't see this problem with other trace points (eg: kmem:kmalloc).
>
>  -Arun