Messages in this thread | | | Date | Sun, 5 Jan 2003 22:17:10 +0100 | Subject | Re: 2.5.54-mm3 | From | uaca@alumni ... |
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Thanks for your reply
Ulisses
On Sun, Jan 05, 2003 at 12:38:16PM -0800, Andrew Morton wrote: > uaca@alumni.uv.es wrote: > > > > On Sat, Jan 04, 2003 at 01:00:38AM -0800, Andrew Morton wrote: > > > > > > http://www.zip.com.au/~akpm/linux/patches/2.5/2.5.54/2.5.54-mm3/ > > > > It seems to me that the patch you pointed here doesn't include the latency > > instrumentation. > > No, it doesn't. You can monitor the latency using realfeel or realfeel2 > from http://www.zip.com.au/~akpm/linux/amlat.tar.gz > > But that won't tell you _why_ large latencies are occurring. For that, > you'll need to apply > http://www.zip.com.au/~akpm/linux/patches/2.5/2.5.54/2.5.54-mm3/experimental/rtc-debug.patch > and run `amlat'. This combination will spit out stack backtraces whenever > there is a 2 millisecond scheduling overrun. > > > Where it is the needed instrumentation to meassure it? > > > > In http://www.zip.com.au/~akpm/linux/ the are no timepeg/intlat patches for > > 2.5... > > That's not suitable for this work. intlat is OK for locating and > measuring interrupts-off code paths. But it's a bit hard to drive. > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.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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