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Date: Fri, 23 Sep 2011 21:10:30 -0700 From: Simon Glass <sjg@...omium.org> To: Valdis.Kletnieks@...edu Cc: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org Subject: Re: [RFC PATCH 0/3] Add accurate boot timing to a Linux system On Fri, Sep 23, 2011 at 4:34 PM, <Valdis.Kletnieks@...edu> wrote: > On Fri, 23 Sep 2011 16:03:15 PDT, Simon Glass said: >> This experimental patch set adds boot timing to a Linux system. The >> timing starts with the boot loader and extends through the kernel into >> user space to the completion of the boot process. The timing starts when >> the system leaves reset, not later when the kernel starts. >> The bootstage record aims to provide 20-30 timestamps ranging from reset >> to login prompt (or some other definition of completion). > > Any way to make this play nice with bootchart, which provides much finer > detail records once userspace gets started? > > https://github.com/mmeeks/bootchart It would be great to collect CPU utilization, disk activity, etc. in the boot loader and the kernel start-up. I don't know if we have the hooks for that though. Everything seems to be based around user space at the moment. Still, we could integrate in the sense that it could show the various boot stages on the chart. Could be useful. Regards, Simon > > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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