From: "H. Peter Anvin" <hpa@zytor.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Thomas Gleixner <tglx@linutronix.de>,
Koki Sanagi <sanagi.koki@jp.fujitsu.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@elte.hu>,
Frederic Weisbecker <fweisbec@gmail.com>,
nhorman@tuxdriver.com, scott.a.mcmillan@intel.com,
laijs@cn.fujitsu.com, LKML <linux-kernel@vger.kernel.org>,
eric.dumazet@gmail.com, kaneshige.kenji@jp.fujitsu.com,
David Miller <davem@davemloft.net>,
izumi.taku@jp.fujitsu.com, kosaki.motohiro@jp.fujitsu.com,
Heiko Carstens <heiko.carstens@de.ibm.com>,
"Luck, Tony" <tony.luck@intel.com>,
Jason Baron <jbaron@redhat.com>
Subject: Re: [PATCH] tracing: Cleanup the convoluted softirq tracepoints
Date: Tue, 19 Oct 2010 16:09:14 -0700 [thread overview]
Message-ID: <4CBE251A.6070603@zytor.com> (raw)
In-Reply-To: <1287529515.16971.538.camel@gandalf.stny.rr.com>
On 10/19/2010 04:05 PM, Steven Rostedt wrote:
>>
>> JMP/Jcc does have a consumer -- the IP -- and actually measuring shows
>> that it is much, much worse than NOP and other dummy instructions.
>
> But how does JMP vs Jcc compare?
>
*As far as I know* they're the same, except of course that a direct JMP
never mispredicts.
-hpa
next prev parent reply other threads:[~2010-10-19 23:10 UTC|newest]
Thread overview: 93+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-23 9:41 [PATCH v4 0/5] netdev: show a process of packets Koki Sanagi
2010-08-23 9:42 ` [PATCH v4 1/5] irq: add tracepoint to softirq_raise Koki Sanagi
2010-09-03 15:29 ` Frederic Weisbecker
2010-09-03 15:39 ` Steven Rostedt
2010-09-03 15:42 ` Frederic Weisbecker
2010-09-03 15:43 ` Steven Rostedt
2010-09-03 15:50 ` Frederic Weisbecker
2010-09-06 1:46 ` Koki Sanagi
2010-09-08 8:33 ` [tip:perf/core] irq: Add " tip-bot for Lai Jiangshan
2010-09-08 11:25 ` [sparc build bug] " Ingo Molnar
2010-09-08 12:26 ` [PATCH] irq: Fix circular headers dependency Frederic Weisbecker
2010-09-09 19:54 ` [tip:perf/core] " tip-bot for Frederic Weisbecker
2010-10-18 9:44 ` [sparc build bug] Re: [tip:perf/core] irq: Add tracepoint to softirq_raise Peter Zijlstra
2010-10-18 10:11 ` Peter Zijlstra
2010-10-18 10:26 ` Heiko Carstens
2010-10-18 10:48 ` Peter Zijlstra
2010-10-19 10:58 ` Koki Sanagi
2010-10-19 11:25 ` Peter Zijlstra
2010-10-19 13:00 ` [PATCH] tracing: Cleanup the convoluted softirq tracepoints Thomas Gleixner
2010-10-19 13:08 ` Peter Zijlstra
2010-10-19 13:22 ` Mathieu Desnoyers
2010-10-19 13:41 ` Thomas Gleixner
2010-10-19 13:54 ` Steven Rostedt
2010-10-19 14:07 ` Thomas Gleixner
2010-10-19 14:28 ` Mathieu Desnoyers
2010-10-19 19:49 ` Thomas Gleixner
2010-10-19 20:55 ` Steven Rostedt
2010-10-19 21:07 ` Thomas Gleixner
2010-10-19 21:23 ` Steven Rostedt
2010-10-19 21:48 ` H. Peter Anvin
2010-10-19 22:23 ` Steven Rostedt
2010-10-19 22:26 ` H. Peter Anvin
2010-10-19 22:27 ` Peter Zijlstra
2010-10-19 23:39 ` H. Peter Anvin
2010-10-19 23:45 ` Steven Rostedt
2010-10-20 0:43 ` Jason Baron
2010-10-19 22:41 ` Mathieu Desnoyers
2010-10-19 22:49 ` H. Peter Anvin
2010-10-19 23:05 ` Steven Rostedt
2010-10-19 23:09 ` H. Peter Anvin [this message]
2010-10-20 15:27 ` Jason Baron
2010-10-20 15:41 ` Mathieu Desnoyers
2010-10-25 21:54 ` H. Peter Anvin
2010-10-25 22:01 ` Mathieu Desnoyers
2010-10-25 22:12 ` H. Peter Anvin
2010-10-25 22:19 ` H. Peter Anvin
2010-10-25 22:55 ` Mathieu Desnoyers
2010-10-26 0:39 ` Steven Rostedt
2010-10-26 1:14 ` Mathieu Desnoyers
2010-10-19 22:04 ` Thomas Gleixner
2010-10-19 22:33 ` Steven Rostedt
2010-10-21 16:18 ` Thomas Gleixner
2010-10-21 17:05 ` Steven Rostedt
2010-10-21 19:56 ` Thomas Gleixner
2010-10-25 22:31 ` H. Peter Anvin
2010-10-19 21:45 ` Thomas Gleixner
2010-10-19 22:14 ` Steven Rostedt
2010-10-19 21:16 ` David Daney
2010-10-19 21:32 ` Jason Baron
2010-10-19 21:38 ` David Daney
2010-10-19 21:47 ` Steven Rostedt
2010-10-19 21:28 ` Jason Baron
2010-10-19 21:55 ` Thomas Gleixner
2010-10-19 22:17 ` Thomas Gleixner
2010-10-20 1:36 ` Steven Rostedt
2010-10-20 1:52 ` Jason Baron
2010-10-25 22:32 ` H. Peter Anvin
2010-10-19 22:38 ` Jason Baron
2010-10-19 22:44 ` H. Peter Anvin
2010-10-19 22:56 ` Steven Rostedt
2010-10-19 22:57 ` H. Peter Anvin
2010-10-19 14:46 ` Steven Rostedt
2010-10-19 14:00 ` Mathieu Desnoyers
2010-10-21 14:52 ` [tip:perf/core] " tip-bot for Thomas Gleixner
2010-08-23 9:43 ` [PATCH v4 2/5] napi: convert trace_napi_poll to TRACE_EVENT Koki Sanagi
2010-08-24 3:52 ` David Miller
2010-09-08 8:34 ` [tip:perf/core] napi: Convert " tip-bot for Neil Horman
2010-08-23 9:45 ` [PATCH v4 3/5] netdev: add tracepoints to netdev layer Koki Sanagi
2010-08-24 3:53 ` David Miller
2010-09-08 8:34 ` [tip:perf/core] netdev: Add " tip-bot for Koki Sanagi
2010-08-23 9:46 ` [PATCH v4 4/5] skb: add tracepoints to freeing skb Koki Sanagi
2010-08-24 3:53 ` David Miller
2010-09-08 8:35 ` [tip:perf/core] skb: Add " tip-bot for Koki Sanagi
2010-08-23 9:47 ` [PATCH v4 5/5] perf:add a script shows a process of packet Koki Sanagi
2010-08-24 3:53 ` David Miller
2010-09-07 16:57 ` Frederic Weisbecker
2010-09-08 8:35 ` [tip:perf/core] perf: Add a script to show packets processing tip-bot for Koki Sanagi
2010-08-30 23:50 ` [PATCH v4 0/5] netdev: show a process of packets Steven Rostedt
2010-09-03 2:10 ` Koki Sanagi
2010-09-03 2:17 ` David Miller
2010-09-03 2:55 ` Koki Sanagi
2010-09-03 4:46 ` Frederic Weisbecker
2010-09-03 5:12 ` Koki Sanagi
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