On Tue, 2005-09-06 at 21:35 -0400, John Richard Moser wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Are there any recent kernel profiles? I think from an acedemic > perspective it'd be nice to see some graphs and numbers nobody > understands showing where the longest running code paths in the kernel > occur. It might also be nice for those latency whores (*runs to the > back and raises hand*) and those who want to increase overall > performance and efficiency; then there'd be a map showing . . . > something that only kernel hackers could possibly understand or care about.
There's a latency histogram option in the -rt patch set. You can pipe the output through gnuplot and get some cool graphs. Then you can use /proc/latency_trace to try and guess what code paths the peaks on the graphs correspond to. The timer interrupt will be the biggest peak, around 23 usecs last time I checked. I haven't done it lately so it would be interesting to see the current graphs. Someone could make a really good presentation out of it at some kernel development conference. Lee - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
