[sr-dev] [kamailio/kamailio] ratelimit module not working properly when FEEDBACK algorithm is used (#871)

[Victor Seva]

> The mistake here seems to be the division by the number of CPU cores, because the overall porcentage retrieved from the /proc/stat file is already in the range from 0-100, regardless of the number of CPU cores

>From `man proc` 

> The amount of time, measured in units of USER_HZ (1/100ths of a second on most architectures, use sysconf(_SC_CLK_TCK) to obtain the right value), that the system spent in various states:


So *not* a percentage 

```
/proc/stat
    kernel/system statistics. Varies with architecture. Common entries include:

        cpu 3357 0 4313 1362393
            The amount of time, measured in units of USER_HZ (1/100ths of a second on most architectures, use sysconf(_SC_CLK_TCK) to obtain the right value), that the system spent in various states:

                user
                    (1) Time spent in user mode. 
                nice
                    (2) Time spent in user mode with low priority (nice). 
                system
                    (3) Time spent in system mode. 
                idle
                    (4) Time spent in the idle task. This value should be USER_HZ times the second entry in the /proc/uptime pseudo-file. 
                iowait (since Linux 2.5.41)
                    (5) Time waiting for I/O to complete. 
                irq (since Linux 2.6.0-test4)
                    (6) Time servicing interrupts. 
                softirq (since Linux 2.6.0-test4)
                    (7) Time servicing softirqs. 
                steal (since Linux 2.6.11)
                    (8) Stolen time, which is the time spent in other operating systems when running in a virtualized environment 
                guest (since Linux 2.6.24)
                    (9) Time spent running a virtual CPU for guest operating systems under the control of the Linux kernel. 
                guest_nice (since Linux 2.6.33)
                    (10) Time spent running a niced guest (virtual CPU for guest operating systems under the control of the Linux kernel). 

        page 5741 1808
            The number of pages the system paged in and the number that were paged out (from disk). 
        swap 1 0
            The number of swap pages that have been brought in and out. 
            intr 1462898 This line shows counts of interrupts serviced since boot time, for each of the possible system interrupts. The first column is the total of all interrupts serviced including unnumbered architecture specific interrupts; each subsequent column is the total for that particular numbered interrupt. Unnumbered interrupts are not shown, only summed into the total. 
        disk_io: (2,0):(31,30,5764,1,2) (3,0):...
            (major,disk_idx):(noinfo, read_io_ops, blks_read, write_io_ops, blks_written)
            (Linux 2.4 only) 
        ctxt 115315
            The number of context switches that the system underwent. 
        btime 769041601
            boot time, in seconds since the Epoch, 1970-01-01 00:00:00 +0000 (UTC). 
        processes 86031
            Number of forks since boot. 
        procs_running 6
            Number of processes in runnable state. (Linux 2.5.45 onward.) 
        procs_blocked 2
            Number of processes blocked waiting for I/O to complete. (Linux 2.5.45 onward.) 

```

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