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...output buffer (where they will be read from from the user > space) and that ensures the order of events is kept. May be less than ideal > but it currently works quite well with network drivers, the performance > overhead is acceptable there. Ah, you are not using the ftrace framework nor relayfs? Mmiotrace used to be relayfs at one point and then converted to ftrace. > A subtle drawback may be that the system sees the memory reads and writes > made by the code of the driver directly but if the driver uses some other > kernel functions, it needs to intercept these calls and deter...

Hi, > Ah, you are not using the ftrace framework nor relayfs? Mmiotrace used to be relayfs at one point and then converted to ftrace. Yes, I considered these when I started working on KernelStrider but finally borrowed ideas from Perf and implemented them. A mmapped ring buffer does its job well and has a higher throughput than Ftrace in my case. > Ar...

On Sat, 19 Oct 2013 17:12:20 +0400 Eugene Shatokhin <euspectre at gmail.com> wrote: > Hi, > > > Ah, you are not using the ftrace framework nor relayfs? Mmiotrace > used to be relayfs at one point and then converted to ftrace. > > Yes, I considered these when I started working on KernelStrider but finally > borrowed ideas from Perf and implemented them. A mmapped ring buffer does > its job well and has a higher throughput than Ft...

On Mon, 14 Oct 2013 22:45:09 +0400 Eugene Shatokhin <euspectre at gmail.com> wrote: > Hi, > > There is an interesting TODO item on MmioTraceDeveloper page: > "kprobes has a generic instruction decoding facility, use that instead of > homebrewn (or KVM), and use emulation instead of page faulting" > > Actually, I have done something similar in one of my