sandip4n

tinymembench v0.4.9 (simple benchmark for memory throughput and latency)
 ---

===============================================================================
== Page Clearing alternatives bandwidth tests                                ==
==                                                                           ==
== Here we will do bandwidth test of all the page clearing alternatives.     ==
== First feature detection is done i.e., if a instruction is micro code      ==
== optimized, and that feature is present on system being tested, then only  ==
== results are displayed, otherwise user is informed about feature not       ==

sandip4n

tinymembench v0.4.9 (simple benchmark for memory throughput and latency)

==========================================================================
== Memory bandwidth tests                                               ==
==                                                                      ==
== Note 1: 1MB = 1000000 bytes                                          ==
== Note 2: Results for 'copy' tests show how many bytes can be          ==
==         copied per second (adding together read and writen           ==
==         bytes would have provided twice higher numbers)              ==
== Note 3: 2-pass copy means that we are using a small temporary buffer ==

sandip4n

Qemu Setup

Build from source

$ git clone https://git.qemu.org/git/qemu.git
$ cd qemu
$ mkdir -p build && cd build
$ ../configure --target-list=x86_64-softmmu
$ make -j$(nproc)

sandip4n

Ibanez Pickup Wiring

⚠️ None of this is guaranteed to work. Use at your own risk.

Pickup Pinout

Seymour Duncan

Color	Coil	Connection

sandip4n

/*
 * Compile as:
 * 	powerpc64-linux-gnu-gcc -o vma-coverage	-g -O0		\
 * 				-mcpu=powerpc64	-mno-altivec	\
 * 				-mno-vsx -nostdlib -static	\
 * 				vma-coverage.c
 */

#ifndef __powerpc64__
#error "unsupported architecture"

sandip4n

/*
 * Compile with a cross toolchain and run as shown below.
 * $ powerpc64le-linux-gnu-gcc clone-test.c -O0 -nostdlib -static -o clone-test
 * $ ./build/POWER/gem5.debug --debug-flags=TLB,ExecAll configs/example/se.py -c ./clone-test
 */

#ifndef __powerpc64__
#error "unsupported architecture"
#endif

sandip4n

Qemu Quick Start

- Create a new virtual disk image
	(host) $ qemu-img create -f qcow2 <path-to-qcow2-image> 30G

- Resize an existing virtual disk image
	(host) $ qemu-img resize <path-to-qcow2-image> +5G

- Resize guest root partition (LVM)

sandip4n

LRU Organization
----------------

struct pagevec
--> Collection of pages to be put in an appropriate LRU list
--> Intermediary for moving pages between active and inactive LRU lists
    or for adding and removing pages to and from LRU lists
--> Holds up to 15 pages
--> Managed via helper functions
    --> pagevec_add() adds a page and returns the remaining number of free slots

sandip4n

For building on a POWER server running GNU/Linux. First, clone the Linus Torvalds' kernel source tree.

$ git clone https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
$ cd linux

To be on the safe side, use one of the standard distro-provided build configurations.

$ cp /boot/config-$(uname -r) .config

sandip4n

/*
 * Compile with a cross toolchain and run as shown below.
 * $ powerpc64le-linux-gnu-gcc clone-test.c -O0 -nostdlib -static -o clone-test
 * $ ./build/POWER/gem5.debug --debug-flags=ExecAll,Registers configs/example/se.py -n 2 -c ./clone-test
 */

#ifndef __powerpc64__
#error "unsupported architecture"
#endif