linux-kernel - Re: [PATCH v2] trace/events: add chip name and hwirq to irq entry tracepoint

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Message-ID: <alpine.DEB.2.11.1506231024250.4037@nanos>
Date:	Tue, 23 Jun 2015 10:25:14 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Ankit Gupta <ankgupta@...eaurora.org>
cc:	rostedt@...dmis.org, mingo@...hat.com, agross@...eaurora.org,
	davem@...emloft.net, rdunlap@...radead.org, standby24x7@...il.com,
	sboyd@...eaurora.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, gavidov@...eaurora.org,
	sdharia@...eaurora.org, linux-arm-msm@...r.kernel.org,
	mlocke@...eaurora.org
Subject: Re: [PATCH v2] trace/events: add chip name and hwirq to irq entry
 tracepoint

On Mon, 22 Jun 2015, Ankit Gupta wrote:

> Add chip name and hw-irq number to the trace_irq_handler_entry()
> tracepoint. When tracing interrupt events the chip-name and hw-irq
> numbers are stable and known in advance. This makes them a better
> choice as a filtering criteria for the trace buffer dump. On the
> flipside, the os-irq numbers are dynamically allocated which makes
> them difficult to use for the same purpose.
> 
> Dump messages will look like:
> ...irq_handler_entry: irq=22 name=msm_serial0 domain=GIC hwirq=140

I can't see the domain name being captured/printed in the code below.
 
> -	TP_printk("irq=%d name=%s", __entry->irq, __get_str(name))
> +	TP_printk("irq=%d name=%s chip_name=%s hwirq=%ld", __entry->irq,
> +	  __get_str(name), show_chip_name(__entry->irq),
> +	  show_hwirq(__entry->irq))
>  );

Thanks,

	tglx
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