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Date:	Fri, 8 Aug 2014 06:52:14 +0200
From:	anshul makkar <>
Subject: kernel in spinlock or deschduled : packet loss during 1 Mpps transfer


I am transferring 1 Million packets from send process to receive
process. Both are running in separate cores. I am using Using DMA
transfer from usermode to the ethernet card.

After transfer I can see 700 - 800 packets loss per transaction.

I doubt that during the transfer kernel may be entering some spinlocks
or descheduling the receiver processor for long enough.

Please can you share how can I debug this case. Please share as to
what approach I can take to detect that. The time involved in the
tranfer is very less around 1 Million packets per second and in that
second packet loss is happening.

Anshul Makkar
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