RE: [PATCH RESEND v3 3/3] X-Power AXP288 PMIC Fuel Gauge Driver

...@vger.kernel.org; linux-...@vger.kernel.org; linux-kernel@vger.kernel.org; todd.e.bra...@linux.intel.com; Brandt, Todd E; jacob.jun@linux.intel.com; sa...@linux.intel.com; lee.jo...@linaro.org; dw...@infradead.org; ji...@kernel.org Subject: [PATCH RESEND v3 3/3] X-Power AXP288 PMIC Fuel Gauge

RE: Is it possible to use ftrace to measure secondary CPU bootup time

> > On Mon, 24 Jul 2017 13:46:07 +0800 > "Huang\, Ying" wrote: > > > Hi, Steven, > > > > We are working on parallelizing secondary CPU bootup. So we need to > > measure the bootup time of secondary CPU, that is, measure time spent in > > smp_init() and its callees. But we found that ftrace no