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diff --git a/docs/08-Streamline-and-cluster-switching-howto.txt b/docs/08-Streamline-and-cluster-switching-howto.txt new file mode 100644 index 0000000..a572a76 --- /dev/null +++ b/docs/08-Streamline-and-cluster-switching-howto.txt @@ -0,0 +1,98 @@ +Instructions & guidelines to use Streamline with Cluster Switching +================================================================== + +A Introduction + + This note describes how the Virtualizer software and the Streamline + tools should be configured to be able to visualize cluster Switching + and PMU counters across switches. + +B Guidelines + + Setting up your target + + 1. Setup Gator + + These instructions are specific to the following big.LITTLE Migration + target: ARM Linux on Real-Time System Model v7.0.1 with the + Virtualizer. + + You have to build the Virtualizer specific gator daemon and the gator + driver. + + Follow the instruction in paragraph 'Setting up an ARM Linux target' + which you can find in ARM DS-5 Documentation in ARM Streamline > + Setting Up Your Target (click Help->Help Contents in your DS-5 Eclipse + window). + + Note that the documentation you find there does not cover the + big.LITTLE Migration target. You have to consider the following + variations: + + * Source code for the Gator driver (gator-driver.tar.gz) and daemon + (gator-daemon.tar.gz) are in the extra/gator subdirectory of the + Virtualizer release tarball. + + * To build the Gator driver, use the Linux kernel source as well as + the configuration file mentioned in docs/03-Linux-kernel-build.txt. + The configuration file has all the necessary Kernel configuration + options for gator enabled already. + + * The Streamline version in DS-5 V5.9 supports the Real-Time System + Model v7.0.1. For this specific model, you get values for the PMU + Cycle counter, the Instruction TLB refill counter and the + Instructions executed counter. Since an RTSM does not provide + accurate cycle and timing information the samples-generated data is + still not meaningful. However, it is sufficient to showcase and + validate the mechanisms required to use the PMUs with the + Virtualizer. + + * A default counter configuration file 'configuration.xml' is provided + in the extra/gator subdirectory of the Virtualizer release tarball. + Note, that you can always configure counters using DS-5's counters + configuration dialog box but the existing configuration.xml already + enables all meaningful counters on the Real-Time System Model v7.0.1. + + * Copy gatord, gator.ko and configuration.xml into the same directory + of the target file system. + + * Run gatord with the default port 8080 since a corresponding setup is + done in the mxscripts for the gatord listening port in user-mode + networking: + $ ./gatord & + + 2. Setup user-mode networking + + * Invoke the model with the network (string networking) related + options depicted in the big-little-mp<x>.mxscript file (x is 1 or 4 + as the case may be). + + * Configure an IP address on the network interface of the target. + There are multiple ways to do it, one would be the following: + + Activate the network interface: + $ ifconfig eth0 up + + Invoke DHCP client on the network interface (e.g. udhcpc in + Busybox) to obtain an ip address: + + $ IP_ADDR=`udhcpc -i eth0 2>/dev/null | grep "^Lease" | + awk '{print $3}'` + + Add the ip address to the network interface: + + $ ifconfig eth0 $IP_ADDR + + Running a Streamline session + + 1. You can now connect from your DS-5 ARM Streamline Data view to the + target by providing 'localhost' into the Address field and press the + 'Start capture' button. + + 2. Invoke cluster switches. Please follow the instruction in + Documentation/cpu-freq/cpufreq-arm-bl.txt in the Linux kernel source + mentioned in docs/03-Linux-kernel-build.txt. + + 3. Press the 'Stop' button of the current Capture and evaluate the + graphical representation of the PMU counters mentioned above as well + as the switching counts. |