feat: benchmark

pfa/Makefile

@@ -158,6 +158,18 @@ rtval_v2recv: rbuild
 cptval_v2recv: cpbuild
 	sudo ./tval_v2recv
 
+# Used to benchmark the kernel's official driver for rtl8139
+cpbenchmark: cpbuild
+	sudo ./benchmark
+
+# Used to benchmark our C driver
+cbenchmark: cbuild
+	sudo ./benchmark
+
+# Used to benchmark our rust driver
+rbenchmark: rbuild
+	sudo ./benchmark
+
 # Test if % is installed, recommand to use ${DEP_CMD} otherwise
 ${REQ_CMD_TARGETS}: check_dep_%:
 	@which $* 2>&1 > /dev/null || (echo -e "\n(ERROR) couldn\'t find $*, considere installing all dependencies with : \n${DEP_CMD}\n" 1>&2 ; exit 1)

pfa/benchmark

@@ -0,0 +1,42 @@
+#!/bin/sh
+
+BUILD_DIR=build
+LINUX_PATH=..
+MAC_ADDRESS=de:ad:be:ef:ca:fe
+
+most_qemu_args="-kernel ${LINUX_PATH}/arch/x86_64/boot/bzImage -initrd ${BUILD_DIR}/initramfs.cpio.gz -no-reboot -nographic -device pci-testdev -netdev tap,id=mynet0 -device rtl8139,netdev=mynet0,mac=${MAC_ADDRESS}"
+
+# Make sure we have sudo token
+sudo id > /dev/null 2>/dev/null
+
+spam ()
+{
+    for _ in $(seq 1 100)
+    do
+        ./build/iperf3 -c 192.168.252.1 | tee -a .benchmark.output
+        sleep 0.1
+
+        # Check if file is not empty
+        if grep 'Done' .benchmark.output >/dev/null 2>&1
+        then
+            break
+        fi
+    done
+}
+
+exec_test ()
+{
+    sudo qemu-system-x86_64 ${most_qemu_args} -append "console=ttyS0 panic=-1 loglevel=15 init='/init benchmark'" >/dev/null 2>&1 &
+
+    sleep 0.5  # It's annoying to find a better way
+    sudo ip a add dev tap0 192.168.252.2/24
+
+    printf "" > .benchmark.output
+
+    spam
+    wait
+
+    echo "Benchmark done, results are in .benchmark.output"
+}
+
+exec_test

pfa/mk/init.sh

@@ -52,6 +52,11 @@ elif [ "$1" = "tval_v2recv'" ]
 then
     timeout 2 nc -lnvu -p 9999
 	exit 1
+
+elif [ "$1" = "benchmark'" ]
+then
+    /iperf3 -s -1
+	exit 1
 fi
 
 exec /bin/sh $@

pfa/mk/initramfs.mk

@@ -29,9 +29,9 @@ initramfs_create_root: busybox_build ${BUILD_DIR}/send_udp ${BUILD_DIR}/initramf
 # Begin of initramfs_root
 # **Make sure busybox_build as been called before**, otherwise it will not
 # create initramfs correctly
-${BUILD_DIR}/initramfs: ${BUILD_DIR}/initramfs/send_udp
+${BUILD_DIR}/initramfs: ${BUILD_DIR}/initramfs/send_udp ${BUILD_DIR}/initramfs/iperf3
 	@# Create usual Linux directories
-	mkdir -p $@/bin $@/sbin $@/etc $@/proc $@/sys $@/dev $@/usr/bin $@/usr/sbin
+	mkdir -p $@/bin $@/sbin $@/etc $@/proc $@/sys $@/dev $@/usr/bin $@/usr/sbin $@/tmp
 	@# Copy busybox applets to ramfs
 	cp -a ${BUSYBOX__INSTALL_PATH}/* $@
 	touch $@

pfa/mk/iperf.mk

@@ -0,0 +1,97 @@
+#
+# Build a x86_64 static executable of iperf3 (using musl-gcc) to embed with
+# initramfs
+#
+# Steps:
+# 1. Download the release of iperf
+# 2. Extract the release archive
+# 3. Download patched linux headers for musl-gcc
+# 4. Create iperf config
+# 5. Build the iperf/_install directory creating links to applets implemented
+#	by iperf
+#
+
+# Guard to prevent including several times iperf.mk
+ifndef _IPERF_MK_
+_IPERF_MK_ := "defined"
+
+BUILD_DIR ?= ../build
+
+# Defaults for linux
+MUSL-GCC ?= musl-gcc
+CROSS_COMPILE ?= 
+
+# Path to _install directory
+IPERF__INSTALL_PATH := $(shell pwd)/${BUILD_DIR}
+
+# Flags passed to make when building iperf
+IPERF_FLAGS+=ARCH=x86_64 \
+	       CROSS_COMPILE="${CROSS_COMPILE}" \
+	       CC=$(MUSL-GCC) \
+	       CFLAGS="-Ilinux-headers-4.19.88-2/x86/include" \
+	       -j$(shell nproc)
+
+
+# Prevent execution of iperf_all on include
+all:
+
+
+# Default iperf target to build
+iperf_all: iperf_build
+
+
+# Build the _install directory, creating links to all applets implemented by
+# iperf
+iperf_build: iperf_download_release iperf_config iperf_install
+
+
+# Download a fixed version of iperf
+iperf_download_release: ${BUILD_DIR}/iperf-3.18
+
+# Begin of targets for iperf_download_release
+${BUILD_DIR}/iperf-3.18: ${BUILD_DIR}/iperf-3.18.tar.gz
+	tar -xf $^ -C $(dir $@)
+	touch $@
+
+${BUILD_DIR}/iperf-3.18.tar.gz:
+	mkdir -p $(dir $@)
+	wget -O "$@" https://github.com/esnet/iperf/releases/download/3.18/iperf-3.18.tar.gz
+	[ -f "$@" ] || (echo -E '(ERROR) wget failed, check your connexion' 1>&2 ; exit 1)
+# End of targets for iperf_download_release
+
+iperf_config: ${BUILD_DIR}/iperf-3.18/Makefile
+
+# Begin of targets for iperf_config
+${BUILD_DIR}/iperf-3.18/Makefile:
+	(cd $(dir $@); ./configure "LDFLAGS=--static" "CC=musl-gcc" --prefix=$(IPERF__INSTALL_PATH) --disable-shared --without-sctp)
+# End of targets for iperf_config
+
+
+iperf_install: ${BUILD_DIR}/iperf3
+
+# Begin of targets for iperf_build_applets
+# make install is phony in iperf makefile, and links applets to iperf
+# executable, so we compile it only if iperf executable is more recent
+${BUILD_DIR}/iperf3: ${BUILD_DIR}/iperf-3.18/src/iperf3
+	@# make install creates the _install directory used to create the
+	@# initramfs 
+	make install -C ${BUILD_DIR}/iperf-3.18 -j$(shell nproc)
+	install ${BUILD_DIR}/bin/iperf3 $@
+
+${BUILD_DIR}/iperf-3.18/src/iperf3:
+	@# compile the executable iperf
+	make -C ${BUILD_DIR}/iperf-3.18
+# End of targets for iperf_build_applets
+
+
+iperf_clean:
+	make clean -C ${BUILD_DIR}/iperf-3.18
+
+
+.PHONY: all \
+	iperf_all \
+	iperf_build \
+	iperf_download_release \
+	iperf_config \
+	iperf_clean
+endif  # ifndef _IPERF_MK_