Our work provides a model for throughput, efficiency and latency of producer/consumer systems when notifications or sleeping are used as a synchronization mechanism identifies different operating regimes depending on the operating parameters validates the accuracy of our model against a VirtIO-based prototype, taking into account most of the details of real-world deployments provides practical and robust strategies to maximize throughput and minimize energy while keeping the latency under control, without depending on precise timing measurements nor unreasonable assumptions on the system’s behavior. We show that when the producer and the consumer process packets at different rates, the high cost required for synchronization (interrupts and ‘kicks’) may reduce throughput of the system well below the slowest of the two parties moreover, accelerating the faster party may cause the throughput to decrease. VMs use one or more single-producer/single-consumer systems to exchange I/O data (e.g. Now I've switched it to legacy and performance is perfect again.In this study, we investigate some counterintuitive but frequent performance issues that arise when doing high-speed networking (or I/O in general) with Virtual Machines (VMs). So it now forces me to go from Inline to Legacy mode, something it didn't do in 2.4.4. When trying to save Suricata config it kept saying "interface does not support Inline IPS Mode with native netmap". It's a VM with 2 NetXtreme II BCM57810 10 Gigabit Ethernet cards connected directly.Īnyone know if/how I can disable this throttling? I didn't have this before upgrade and the throughput was always maximum my line can offer (glass fibre 500mbps).ĬPU even during speed test, with Suricata enabled, is very low (10% or so). Mar 9 11:47:29 MDR2 kernel: interrupt storm detected on "irq17:" throttling interrupt sourceMar 9 11:47:30 MDR2 kernel: interrupt storm detected on "irq17:" throttling interrupt sourceMar 9 11:47:31 MDR2 kernel: interrupt storm detected on "irq17:" throttling interrupt source If I enable Suricata I get this over and over in the shell (only while doing the speed test between LAN and WAN). If I disable Suricata it's fine though and throughput is normal. So I just updated from 2.4.4(3) to 2.5.0 and since the upgrade my maximum speed has dropped from 500mbps to 150ish.
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