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MFC r207071:

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Intialize interrupt moderation control register. The magic value
  was chosen by lots of trial and errors. The chosen value shows
  good interrupt moderation without additional latency.
  Without this change, controller can generate more than 140k
  interrupts per second under high network load.

  Submitted by:	xclin <xclin <> cs dot nctu dot edu dot tw >
This commit is contained in:
Pyun YongHyeon 2010-04-26 18:07:55 +00:00
parent ed0af45af3
commit 3e1961268e
1 changed files with 3 additions and 0 deletions
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3
sys/dev/sge/if_sge.c
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@ -1551,10 +1551,13 @@ sge_init_locked(struct sge_softc *sc)
/*
* XXX Try to mitigate interrupts.
*/
CSR_WRITE_4(sc, IntrControl, 0x08880000);
#ifdef notyet
if (sc->sge_intrcontrol != 0)
CSR_WRITE_4(sc, IntrControl, sc->sge_intrcontrol);
if (sc->sge_intrtimer != 0)
CSR_WRITE_4(sc, IntrTimer, sc->sge_intrtimer);
#endif
/*
* Clear and enable interrupts.