Messages in this thread | | | Date | Mon, 28 Jun 2004 22:11:22 +1000 | From | Con Kolivas <> | Subject | Re: [PATCH] Staircase scheduler v7.4 |
| |
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
Felipe Alfaro Solana wrote: | On Mon, 2004-06-28 at 18:49 +1000, Nick Piggin wrote: | |>Felipe Alfaro Solana wrote: |> |> |>>I have tested 2.6.7-bk10 plus from_2.6.7_to_staircase_7.7 patch and, |>>while it's definitively better than previous versions, it still feels a |>>little jerky when moving windows in X11 wrt to -mm3. Renicing makes it a |>>little bit smoother, but not as much as -mm3 without renicing. |>> |> |>You know, if renicing X makes it smoother, then that is a good thing |>IMO. X needs large amounts of CPU and low latency in order to get |>good interactivity, which is something the scheduler shouldn't give |>to a process unless it is told to. | | | But the problem here is that -ck3 with X reniced to -10 is not as smooth | as -mm3 with no renicing. That's what worries me.
The design of staircase would make renicing normal interactive things - -ve values bad for the latency of other nice 0 tasks s is not recommended for X or games etc. Initial scheduling latency is very dependent on nice value in staircase. If you set a cpu hog to nice -5 it will hurt audio at nice 0 and so on. Nicing latency unimportant things with +ve values is more useful with this design. If you run X and evolution at the same nice value they will get equal cpu share for example so moving windows means redrawing evolution and X moving get equal cpu. Nicing evolution +ve will make X smoother compared to evolution redrawing and so on...
Con -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org
iD8DBQFA4ArqZUg7+tp6mRURAn2BAJ4hkK871JXO/R3AvwR0CzKoLg6f6wCeNBP/ Y1aOfCWLR5QtVZvq8wdpToI= =xit3 -----END PGP SIGNATURE----- - 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/
| |