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Subject: Re: [BUG] perf failed on multi-cpus system with multi-events
 specified
From: Peter Zijlstra <peterz@infradead.org>
To: Han Pingtian <phan@redhat.com>
Cc: linux-kernel@vger.kernel.org, Arnaldo Carvalho de Melo <acme@redhat.com>
In-Reply-To: <20110302035821.GA5186@hpt.nay.redhat.com>
References: <20110302035821.GA5186@hpt.nay.redhat.com>
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Date: Wed, 02 Mar 2011 10:38:36 +0100
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On Wed, 2011-03-02 at 11:58 +0800, Han Pingtian wrote:
>   Error: sys_perf_event_open() syscall returned with -1 (Too many open
> files).  /bin/dmesg may provide additional information.

Well, you tried to use 42 events (quick count), we need to open a fd for
each cpu for each event, which results in 1008 fds, which together with
some actual file handles might have tickled your fd limit.