On 23 Jan 2002, Momchil Velikov wrote: >> Since when application startup times has any significance to the >> performance of any computer system :) On Wed, Jan 23, 2002 at 09:59:35AM +0200, Zwane Mwaikambo wrote: > Hehehe everyone knows it all about boot times and application startup > times ;) once stuff is open, we can go back to being sloths =) > ahh the Microsoft Mindset... Well, consider it briefly for a moment: Q1: what takes the most time during boot? A1: inefficient userspace initialization but worse yet, firmware stuff Q2: what takes the most time during application startup? A2: disk accesses A1 and A2 have some impact on what could perhaps be considered important (to some people) aspects of performance. For instance, boot times contribute to some rather large latencies important to clustering folk. LinuxBIOS (or other strategies for replacing inefficient firmware with performant firmware) certainly sounds like a good strategy for (1). At any rate, the filesystem profiling + defragmentation doesn't seem like a bad idea at all, though I'm wondering how much of it could be driven from userspace. Probably the minimal kernel support needed would be some kind of inode-based access profiling. So (2) perhaps also has an answer. Cheers, Bill -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ IRC Channel: irc.openprojects.net / #kernelnewbies Web Page: http://www.kernelnewbies.org/
