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igb_uio: use non-threaded ISR

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This eliminates the overhead of a task switch when an interrupt arrives.

Signed-off-by: David Su <david.w.su@intel.com>
Acked-by: Ferruh Yigit <ferruh.yigit@intel.com>
This commit is contained in:
David Su 2017-01-20 15:08:19 -08:00 committed by Thomas Monjalon
parent d287e4d41b
commit f0d1896fa1
1 changed files with 2 additions and 1 deletions
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3
lib/librte_eal/linuxapp/igb_uio/igb_uio.c
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@ -384,6 +384,7 @@ igbuio_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
msix_entry.entry = 0;
if (pci_enable_msix(dev, &msix_entry, 1) == 0) {
dev_dbg(&dev->dev, "using MSI-X");
udev->info.irq_flags = IRQF_NO_THREAD;
udev->info.irq = msix_entry.vector;
udev->mode = RTE_INTR_MODE_MSIX;
break;
@ -392,7 +393,7 @@ igbuio_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
case RTE_INTR_MODE_LEGACY:
if (pci_intx_mask_supported(dev)) {
dev_dbg(&dev->dev, "using INTX");
udev->info.irq_flags = IRQF_SHARED;
udev->info.irq_flags = IRQF_SHARED | IRQF_NO_THREAD;
udev->info.irq = dev->irq;
udev->mode = RTE_INTR_MODE_LEGACY;
break;