From: Ingo Molnar <mingo@elte.hu>
To: Paul Mackerras <paulus@samba.org>
Cc: "Peter Zijlstra" <a.p.zijlstra@chello.nl>,
linux-kernel@vger.kernel.org,
"Arnaldo Carvalho de Melo" <acme@redhat.com>,
"Mike Galbraith" <efault@gmx.de>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Frédéric Weisbecker" <fweisbec@gmail.com>
Subject: Re: [PATCH] perf_counter: tools: Rework event parsing
Date: Wed, 1 Jul 2009 10:24:57 +0200 [thread overview]
Message-ID: <20090701082457.GB25593@elte.hu> (raw)
In-Reply-To: <19018.53826.843815.189847@cargo.ozlabs.ibm.com>
* Paul Mackerras <paulus@samba.org> wrote:
> This reworks the parser for event descriptors to make it more
> consistent in what it accepts. It is now structured as a recursive
> descent parser for the following grammar:
>
> events ::= event ( ("," | space) space* event )*
> event ::= ( raw_event | numeric_event | symbolic_event |
> generic_hw_event ) [ event_modifier ]
> raw_event ::= "r" hex_number
> numeric_event ::= number ":" number
> number ::= decimal_number | "0x" hex_number | "0" octal_number
> symbolic_event ::= string_from_event_symbols_array
> generic_hw_event::= cache_type ( "-" ( cache_op | cache_result ) )*
> event_modifier ::= ":" ( "u" | "k" | "h" )+
Very nice changes, thanks Paul!
Ingo
next prev parent reply other threads:[~2009-07-01 8:25 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-01 3:04 Paul Mackerras
2009-07-01 8:24 ` Ingo Molnar [this message]
2009-07-01 8:47 ` [tip:perfcounters/urgent] perf_counter tools: Rework event string parsing/syntax tip-bot for Paul Mackerras
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