Messages in this thread | | | Date | Sat, 17 Nov 2007 21:31:25 -0800 | From | "kernel coder" <> | Subject | increased number of cycles |
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hi, I'm trying to add some code to netif_receive_skb function in dev.c file . The cycles consumed by that code was around 16 cycles on Dual Core Opetron machine.I'm working on that code for last 6 months now and the consumed cycles have always been around 16 cycles .I don't touch any other part of kernel .
But for last 4 days the consumed cycles have suddenly increased to around 35 cycles . I'm using RDTSC instruction to profile the code.There is no change in code and the kernel version is also the same .I am assuming that there must be something wrong with hardware.
Please guide me how can i figure out the root cause.What areas should i look at to find out the reason for increased number of cycles.I don't think that there is any issue in kernel because the kernel version and code is same . Can the the log messages during system bootup help me to diagnose the problem
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