From mboxrd@z Thu Jan  1 00:00:00 1970
From: rcpilot2010@gmail.com (Abu Rasheda)
Date: Thu, 7 Jun 2012 10:47:31 -0700
Subject: Module vs Kernel main performacne
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To: kernelnewbies@lists.kernelnewbies.org
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>
> Hello Abu,
>
> I had to include <linux/module.h> or an error was issued about
> "THIS_MODULE".
>

I am running this tool on Scientific Linux 6.0, which is 2.6.32 kernel. I
know this is old but this is what I have for my product.


> What Kernel version are you using? I'm trying to compile it and I'm
> getting the error:
>
> [peter at ace m]$ make
> make -C /lib/modules/3.3.7-1.fc17.x86_64/build SUBDIRS=`pwd` modules
> make[1]: Entering directory `/usr/src/kernels/3.3.7-1.fc17.x86_64'
>  CC [M]  /tmp/m/m.o
> /tmp/m/m.c:36:2: error: unknown field ?ioctl? specified in initializer
> /tmp/m/m.c:36:2: warning: initialization from incompatible pointer
> type [enabled by default]
> /tmp/m/m.c:36:2: warning: (near initialization for ?m_fops.llseek?)
> [enabled by default]
> make[2]: *** [/tmp/m/m.o] Error 1
> make[1]: *** [_module_/tmp/m] Error 2
> make[1]: Leaving directory `/usr/src/kernels/3.3.7-1.fc17.x86_64'
> make: *** [module] Error 2
>
> According to:
> http://lxr.linux.no/linux+v3.4.1/include/linux/fs.h#L1609
>
> There is no .ioctl at struct file_operations...
>
> Can you share how you've used perf/oprofile on your module/Kernel code?
>
> []'s
>
> Peter


for perf:

perf stat -e
cpu-cycles,stalled-cycles-frontend,stalled-cycles-backend,instructions,cache-references,cache-misses,branch-instructions,branch-misses,bus-cycles,cpu-clock,task-clock,page-faults,minor-faults,major-faults,context-switches,cpu-migrations,alignment-faults,emulation-faults,L1-dcache-loads,L1-dcache-load-misses,L1-dcache-stores,L1-dcache-store-misses,L1-dcache-prefetches,L1-dcache-prefetch-misses,L1-icache-loads,L1-icache-load-misses,L1-icache-prefetches,L1-icache-prefetch-misses,LLC-loads,LLC-load-misses,LLC-stores,LLC-store-misses,LLC-prefetches,LLC-prefetch-misses,dTLB-loads,dTLB-load-misses,dTLB-stores,dTLB-store-misses,dTLB-prefetches,dTLB-prefetch-misses,iTLB-loads,iTLB-load-misses,branch-loads,branch-load-misses,syscalls:sys_enter_sendmsg,syscalls:sys_exit_sendmsg,sched:sched_wakeup,sched:sched_stat_sleep
./prog

for oprofile:

# opcontrol --reset
# opcontrol --vmlinux=/boot/vmlinux.64
# opcontrol --start
# ./a.out
# opcontrol --shutdown
# opreport -l -p
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