Messages in this thread | | | From | Ed Tomlinson <> | Subject | Re: anticipatory scheduling questions | Date | Sat, 01 Mar 2003 07:48:45 -0500 |
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Andrew Morton wrote:
> "Felipe Alfaro Solana" <felipe_alfaro@linuxmail.org> wrote: >> >> ----- Original Message ----- >> > > It wasn't a typo... In fact, both deadline and AS give roughly the >> > > same timings (one second up or down). But I >> > > still don't understand why 2.5 is performing so much worse than 2.4. >> > >> > Me either. It's a bug. >> > >> > Does basic 2.5.63 do the same thing? Do you have a feel for when it >> > started happening? >> >> This has happened since the moment I switched from 2.4 to 2.5.63-mm1. > > You have not actually said whether 2.5.63 base exhibits the same problem. > From the vmstat traces it appears that the answer is "yes"? > >> > > Could a "vmstat" or "iostat" dump be interesting? >> > 2.4 versus 2.5 would be interesting, yes. >> >> I have retested this with 2.4.20-2.54, 2.5.63 and 2.5.63-mm1... >> and have attached the files to this message > > Thanks. Note how 2.4 is consuming a few percent CPU, whereas 2.5 is > consuming 100%. Approximately half of it system time. > > It does appear that some change in 2.5 has caused evolution to go berserk > during this operation. > > >> (I think pasting them >> here would result in wrapping, making it harder to read). >> >> If you need more testing or benchmarking, ask for it :-) > > Thanks for your patience. > > The next step please is: > > a) run top during the operation, work out which process is chewing all > that CPU. Presumably it will be evolution or aspell > > b) Do it again and this time run > > strace -p $(pidof evolution) # or aspell > > This will tell us what it is up to.
It might also help to know the filesystem(s) being used.
Ed Tomlinson - 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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