On Mon, 2005-03-28 at 13:42 -0800, Paul Jackson wrote: > Guillaume wrote: > > The lmbench shows that the overhead (the construction and the sending > > of the message) in the fork() routine is around 7%. > > Thanks for including the numbers. The 7% seems a bit costly, for a bit > more accounting information. Perhaps dean's suggestion, to not use > ascii, will help. I hope so, though I doubt it will make a huge > difference. Was this 7% loss with or without a user level program > consuming the sent messages? I would think that the number of interest > would include a minimal consumer task.
Yes, dean's suggestion helps. The overhead is now around 4% fork_connector disabled: Process fork+exit: 149.4444 microseconds fork_connector enabled: Process fork+exit: 154.9167 microseconds > Having the "#ifdef CONFIG_FORK_CONNECTOR" chunk of code right in fork.c > seems unfortunate. Can the real fork_connector() be put elsewhere, and > the ifdef put in a header file that makes it a no-op if not configured, > or simply a function declaration, if configured? I think that it can be moved in include/linux/connector.h Guillaume - 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/
