Messages in this thread | | | From | Samium Gromoff <> | Subject | Ess Solo-1 interrupt behaviour (fwd) | Date | Tue, 19 Feb 2002 16:25:10 +0300 (MSK) |
| |
Forwarded message: > From root Tue Feb 19 15:52:24 2002 > Subject: Ess Solo-1 interrupt behaviour > To: linux-kernel@vger.kernel.org > Date: Tue, 19 Feb 2002 15:52:24 +0300 (MSK) > X-Mailer: ELM [version 2.5 PL6] > Content-Length: 1318 > > I`ve recently spotted that a solo1 pci soundcard generates > 16000+ interrupts/second with esd started idling. > > What strikes me as odd is that my old good isa sb16 vibra > does only 600+ interrupts. > > Also i`ve had some strange experience of this interrupt load > affecting the disk io. > The situation was the next: i`ve had a large transfer to a samba > boxen with this poor solo1 soundcard. I would like to emphasize that i > turn off the drive write-caching ability in order to gain reliability, > and that with write cacheing the following issues are hardly noticeable. > So yes, i was copying large amount of data thru the 10mbit rtl8029s > to the samba box. What i`ve tested are two situations: with esd on == > effective 16,5k interrupts/second, and with esd off, and thus no interrupts > generated by the solo1 card. > What i`ve noticed quite disappointed me: with esd turned on, the disk > writeout activity (well, the seek activity) was _much_ higher. > Ie i`ve stopped esd, the seekage dropped down, i`ve started esd - > seekage goes back. > > So we basically have here two strange issues: > 1. Ess Solo-1 driver generates awful lots of interrupts (16k/s) > 2. Heavy interrupt load forces the elevator to make bad > decisions > > Info: linux-2.4.17-rmap12e, p2-300 128M RAM, rtl8029 NIC, Ess Solo-1 SB > > regards, Samium Gromoff > > resending, Samium Gromoff - 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/
| |