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From: David Su <david.w.su@intel.com>
To: dev@dpdk.org
Cc: David Su <david.w.su@intel.com>
Subject: [PATCH] igb_uio: use non-threaded ISR
Date: Fri, 20 Jan 2017 15:08:19 -0800	[thread overview]
Message-ID: <1484953699-3156-1-git-send-email-david.w.su@intel.com> (raw)

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

Signed-off-by: David Su <david.w.su@intel.com>
---
 lib/librte_eal/linuxapp/igb_uio/igb_uio.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
index df41e45..9338e14 100644
--- a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
+++ b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
@@ -382,6 +382,7 @@ 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;
@@ -390,7 +391,7 @@ 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;
-- 
1.7.0.4

             reply	other threads:[~2017-01-20 23:08 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-01-20 23:08 David Su [this message]
2017-01-20 23:50 ` [PATCH] igb_uio: use non-threaded ISR Stephen Hemminger
2017-01-23 19:20   ` Su, David W
2017-01-23 21:12     ` Stephen Hemminger
2017-02-24 17:54 ` Ferruh Yigit
2017-02-25  0:21   ` Su, David W
2017-02-27 16:15 ` Ferruh Yigit
2017-03-30 20:28   ` Thomas Monjalon

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