Hi Warner, thanks for taking the time again …
> OK. This means that whatever I/O workload we've done has caused the NVME card > to stop responding for 30s, so we reset it. I figured as much ;-) > So it's an intel card. Yes - I already added this info several times. 6 of them, 2.5“ NVME „disk drives“. > OK. That suggests Intel has a problem with their firmware. I came across this one: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=211713 Is it more probable that Intel has got buggy firmware here than that „we“ are missing interrupts? The mainboard is the Supermicro H11SSW-NT. Two NVME drive bays share a connector on the mainboard: NVMe Ports ( NVMe 0~7, 10, 11, 14, 15) The H11SSW-iN/NT has tweleve (12) NVMe ports (2 ports per 1 Slim SAS connector) on the motherboard. These ports provide high-speed, low-latency PCI-E 3.0 x4 connections directly from the CPU to NVMe Solid State (SSD) drives. This greatly increases SSD data- throughput performance and significantly reduces PCI-E latency by simplifying driver/software requirements resulting from direct PCI-E interface from the CPU to the NVMe SSD drives. Is this purely mechanical or do two drives share PCI-E resources? Which would explain why the problems always come in pairs (nvme6 and nvme7, for example). This afternoon I set up a system with 4 drives and I was not able to reproduce the problem. (We just got 3 more machines which happened to have 4 drives each and no M.2 directly on the mainboard). I will change the config to 6 drives like with the two FreeNAS systems in our data center. > [… nda(4) ...] > I doubt that would have any effect. They both throw as much I/O onto the card > as possible in the default config. I found out - yes, just the same. > There's been some minor improvements in -current here. Any chance you could > experimentally try that with this test? You won't get as many I/O abort > errors (since we don't print those), and we have a few more workarounds for > the reset path (though honestly, it's still kinda stinky). HEAD or RELENG_12, too? Kind regards, Patrick -- punkt.de GmbH Internet - Dienstleistungen - Beratung Kaiserallee 13a Tel.: 0721 9109-0 Fax: -100 76133 Karlsruhe i...@punkt.de http://punkt.de AG Mannheim 108285 Gf: Juergen Egeling _______________________________________________ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
