[PATCH] net: netvsc: Increase default VMBus channel from 8 to 16
From: Erni Sri Satya Vennela <hidden>
Date: 2024-08-06 05:57:26
Also in:
linux-hyperv, lkml
Subsystem:
hyper-v/azure core and drivers, networking drivers, the rest · Maintainers:
"K. Y. Srinivasan", Haiyang Zhang, Wei Liu, Dexuan Cui, Long Li, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Increase default VMBus channels in Linux netvsc from 8 to 16 to align with Azure Windows VM and improve networking throughput. Set channels to 16 for VMs with more than 16 vCPUs; otherwise, channels depend on VM's vCPU count. Performance tests showed significant improvement in throughput: - 0.54% for 16 vCPUs - 1.51% for 32 vCPUs - 0.72% for 48 vCPUs - 5.57% for 64 vCPUs - 9.14% for 96 vCPUs Signed-off-by: Erni Sri Satya Vennela <redacted> Reviewed-by: Shradha Gupta <redacted> --- drivers/net/hyperv/hyperv_net.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h
index 810977952f95..e690b95b1bbb 100644
--- a/drivers/net/hyperv/hyperv_net.h
+++ b/drivers/net/hyperv/hyperv_net.h@@ -882,7 +882,7 @@ struct nvsp_message { #define VRSS_SEND_TAB_SIZE 16 /* must be power of 2 */ #define VRSS_CHANNEL_MAX 64 -#define VRSS_CHANNEL_DEFAULT 8 +#define VRSS_CHANNEL_DEFAULT 16 #define RNDIS_MAX_PKT_DEFAULT 8 #define RNDIS_PKT_ALIGN_DEFAULT 8
--
2.25.1