diff --git a/repos/ports/run/vbox_auto_win7.run b/repos/ports/run/vbox_auto_win7.run
index 625fc85f7..66856371e 100644
--- a/repos/ports/run/vbox_auto_win7.run
+++ b/repos/ports/run/vbox_auto_win7.run
@@ -16,4 +16,7 @@ set use_overlay_from_disk 1
 set use_usb 1
 set use_ps2 [have_spec ps2]
 
+set use_vms 1
+set use_cpu_load 0
+
 source ${genode_dir}/repos/ports/run/vbox_win.inc
diff --git a/repos/ports/run/vbox_auto_win7_64.run b/repos/ports/run/vbox_auto_win7_64.run
index 1fc212189..d260eed11 100644
--- a/repos/ports/run/vbox_auto_win7_64.run
+++ b/repos/ports/run/vbox_auto_win7_64.run
@@ -18,4 +18,7 @@ set use_overlay_from_disk 1
 set use_usb 1
 set use_ps2 [have_spec ps2]
 
+set use_vms 1
+set use_cpu_load 0
+
 source ${genode_dir}/repos/ports/run/vbox_win.inc
diff --git a/repos/ports/run/vbox_auto_win7_64_raw.run b/repos/ports/run/vbox_auto_win7_64_raw.run
index d725b7d57..1a8e72f7d 100644
--- a/repos/ports/run/vbox_auto_win7_64_raw.run
+++ b/repos/ports/run/vbox_auto_win7_64_raw.run
@@ -17,4 +17,7 @@ set use_overlay_from_disk 0
 set use_usb 1
 set use_ps2 [have_spec ps2]
 
+set use_vms 1
+set use_cpu_load 0
+
 source ${genode_dir}/repos/ports/run/vbox_win.inc
diff --git a/repos/ports/run/vbox_auto_win7_share.run b/repos/ports/run/vbox_auto_win7_share.run
index ae7b075c8..cd1dff0e2 100644
--- a/repos/ports/run/vbox_auto_win7_share.run
+++ b/repos/ports/run/vbox_auto_win7_share.run
@@ -83,6 +83,9 @@ set use_rumpfs 1
 set use_usb 0
 set use_ps2 [have_spec ps2]
 
+set use_vms 1
+set use_cpu_load 0
+
 #
 # Create .bat file to be executed by Win VM
 #
diff --git a/repos/ports/run/vbox_auto_win7_vbox5.run b/repos/ports/run/vbox_auto_win7_vbox5.run
index c8c026bae..b979d7c08 100644
--- a/repos/ports/run/vbox_auto_win7_vbox5.run
+++ b/repos/ports/run/vbox_auto_win7_vbox5.run
@@ -19,4 +19,7 @@ set use_overlay_from_disk 1
 set use_usb 1
 set use_ps2 [have_spec ps2]
 
+set use_vms 1
+set use_cpu_load 0
+
 source ${genode_dir}/repos/ports/run/vbox_win.inc
diff --git a/repos/ports/run/vbox_auto_win81_64.run b/repos/ports/run/vbox_auto_win81_64.run
index d73dc4caa..ba751a271 100644
--- a/repos/ports/run/vbox_auto_win81_64.run
+++ b/repos/ports/run/vbox_auto_win81_64.run
@@ -18,4 +18,7 @@ set use_overlay_from_disk 1
 set use_usb 1
 set use_ps2 [have_spec ps2]
 
+set use_vms 1
+set use_cpu_load 0
+
 source ${genode_dir}/repos/ports/run/vbox_win.inc
diff --git a/repos/ports/run/vbox_win.inc b/repos/ports/run/vbox_win.inc
index 29ccd9bc6..288b757ac 100644
--- a/repos/ports/run/vbox_win.inc
+++ b/repos/ports/run/vbox_win.inc
@@ -9,6 +9,11 @@ if {[have_include "power_on/qemu"]} {
 	exit 0
 }
 
+if {[expr !$use_rumpfs && $use_vms > 1] } {
+	puts "\nConfiguration bug - have only one raw block partition.\n"
+	exit 1
+}
+
 set vdi_image "${flavor}.vdi"
 set raw_image "${flavor}.vmdk"
 set vbox_file "vm_${flavor}.vbox"
@@ -98,11 +103,21 @@ append config_of_app {
 		<provides> <service name="Report"/> <service name="ROM"/> </provides>
 		<config>
 			<policy label="vbox_pointer -> hover"               report="nitpicker -> hover"/>
-			<policy label="vbox_pointer -> xray"                report="nitpicker -> xray"/>
-			<policy label="vbox_pointer -> shape"               report="vbox -> shape"/>
+			<policy label="vbox_pointer -> xray"                report="nitpicker -> xray"/>}
+
+for { set i 1} { $i <= $use_vms } { incr i} {
+append config_of_app "
+			<policy label=\"vbox_pointer -> shape$i\"           report=\"vbox$i -> shape\"/>"
+}
+
+append config_of_app {
 			<policy label="usb_report_filter -> devices"        report="usb_drv -> devices"/>
 			<policy label="usb_report_filter -> usb_drv_config" report="usb_drv -> config"/>
-			<policy label="vbox -> usb_devices"                 report="usb_report_filter -> usb_devices"/>
+			<policy label="vbox1 -> usb_devices"                report="usb_report_filter -> usb_devices"/>}
+append_if [expr $use_cpu_load] config_of_app {
+			<policy label="cpu_load_display -> trace_subjects"
+			        report="trace_subject_reporter -> trace_subjects"/>}
+append config_of_app {
 		</config>
 	</start>
 
@@ -118,127 +133,170 @@ append config_of_app {
 		<config>
 			<report focus="yes" hover="yes" xray="yes" />
 
-			<domain name="pointer" layer="1" content="client" label="no" origin="pointer" />
-			<domain name="vbox"    layer="2" content="client" focus="click" hover="always" />
-			<domain name=""        layer="2" content="client" focus="click" hover="always" />
+			<domain name="pointer"  layer="1" content="client" label="no" origin="pointer" />
+			<domain name="cpu_load" layer="2" content="client" label="no" />
+			<domain name=""         layer="3" content="client" focus="click" hover="always" />
 
-			<policy label="vbox_pointer" domain="pointer"/>
-			<policy label="nit_fb"       domain="vbox"/>
+			<policy label="vbox_pointer"     domain="pointer"/>
+			<policy label="cpu_load_display" domain="cpu_load"/>
 			<default-policy domain=""/>
 		</config>
 	</start>
 
 	<start name="vbox_pointer" priority="-1">
 		<resource name="RAM" quantum="1200K"/>
-		<config>
-			<policy label="nit_fb" rom="shape"/>
+		<config>}
+
+for { set i 1} { $i <= $use_vms } { incr i} {
+append config_of_app "
+			<policy label=\"nit_fb$i\" rom=\"shape$i\"/>"
+}
+
+append config_of_app {
 		</config>
 		<route>
 			<service name="Nitpicker"> <child name="nitpicker"/>  </service>
 			<service name="ROM">       <child name="report_rom"/> </service>
 			<any-service> <parent/> <any-child/> </any-service>
 		</route>
-	</start>
+	</start>}
 
-	<start name="nit_fb" priority="-1">
+for { set i 1} { $i <= $use_vms } { incr i} {
+	append config_of_app "
+	<start name=\"nit_fb${i}\" priority=\"-1\">"
+	append config_of_app {
+		<binary name="nit_fb"/>
 		<resource name="RAM" quantum="8M" />
-		<configfile name="nit_fb.config"/>
 		<provides>
 			<service name="Framebuffer" />
 			<service name="Input" />
-		</provides>
-		<route>
-			<service name="ROM" label="nit_fb.config"> <child name="nit_fb-config"/> </service>
+		</provides>}
+
+	append config_of_app "
+		<configfile name=\"nit_fb${i}.config\"/>"
+
+	append config_of_app {
+		<route>}
+
+	append config_of_app "
+			<service name=\"ROM\" label=\"nit_fb${i}.config\"> <child name=\"nit_fb-config\"/> </service>"
+
+	append config_of_app {
 			<service name="LOG"> <parent/> </service>
 			<service name="Nitpicker"> <child name="nitpicker"/> </service>
 		</route>
-	</start>
+	</start>}
+}
 
+append config_of_app {
 	<start name="nit_fb-config" priority="-1">
 		<binary name="dynamic_rom"/>
 		<resource name="RAM" quantum="1M"/>
 		<provides> <service name="ROM"/> </provides>
-		<config>
-			<rom name="nit_fb.config">
-				<inline description="standard">
-					<config/>
-				</inline>
-				<sleep milliseconds="60000" />}
+		<config>}
 
-append_if [expr !$use_rumpfs] config_of_app {
+for { set i 1} { $i <= $use_vms } { incr i} {
+	append config_of_app "
+			<rom name=\"nit_fb${i}.config\">"
+
+	append config_of_app {
+				<inline description="standard">}
+
+	if { $use_vms > 1 } {
+		append config_of_app "
+		<config xpos=\"[expr ${i} * 50]\" ypos=\"[expr (${i} - 1) * 5 + 2]\" width=\"1024\" height=\"768\"/>"
+	} else {
+		append config_of_app {
+		<config/>}
+	}
+
+	append config_of_app {
+				</inline>
+				<sleep milliseconds="50000" />}
+
+	append_if [expr !$use_rumpfs] config_of_app {
 				<inline description="shutdown">
 					<config width="0" height="0"/>
 				</inline>
-				<sleep milliseconds="600000" />}
+				<sleep milliseconds="500000" />}
+
+	append config_of_app {
+			</rom>}
+}
 
 append config_of_app {
-			</rom>
 		</config>
 		<route>
-			<service name="RM">     <parent/> </service>
-			<service name="LOG">    <parent/> </service>
-			<service name="Timer">     <child name="timer"/>     </service>
+			<service name="RM"> <parent/> </service>
+			<service name="LOG"> <parent/> </service>
+			<service name="Timer"> <child name="timer"/> </service>
 		</route>
-	</start>
+	</start>}
 
-	<start name="vbox" priority="-2">}
-append_if [expr $use_vbox4] config_of_app {
+for { set i 1} { $i <= $use_vms } { incr i} {
+	append config_of_app "
+	<start name=\"vbox${i}\" priority=\"-2\">"
+	append_if [expr $use_vbox4] config_of_app {
 		<binary name="virtualbox" />}
-append_if [expr $use_vbox5] config_of_app {
+	append_if [expr $use_vbox5] config_of_app {
 		<binary name="virtualbox5" />}
 
-append config_of_app {
+	append config_of_app {
 		<resource name="RAM" quantum="1280M"/>}
-append config_of_app "
-			<config ld_verbose=\"yes\" vbox_file=\"${vbox_file}\" vm_name=\"${flavor}\" xhci=\"yes\">"
-append config_of_app {
+	if { $use_vms eq 1 } {
+		append config_of_app "
+		<config ld_verbose=\"yes\" vbox_file=\"${vbox_file}\" vm_name=\"${flavor}\" xhci=\"yes\">"
+	} else {
+		append config_of_app "
+		<affinity xpos=\"[expr $i]\" width=\"2\" />
+		<config ld_verbose=\"yes\" vbox_file=\"${vbox_file}\" vm_name=\"${flavor}\" xhci=\"no\">"
+	}
+	append config_of_app {
 			<libc stdout="/dev/log" stderr="/dev/log" rtc="/dev/rtc">
 				<vfs>
 					<dir name="dev">
 						<log/> <rtc/>}
 
-append_if [expr !$use_rumpfs] config_of_app {
+	append_if [expr !$use_rumpfs] config_of_app {
 						<block name="sda3" label="raw" block_buffer_count="128" />}
-append config_of_app {
+	append config_of_app {
 						</dir>}
 
-append_if [expr $use_ram_fs] config_of_app {
+	append_if [expr $use_ram_fs] config_of_app {
 					<dir name="ram">  <fs label="from_ram_fs"/> </dir>}
 
-append config_of_app "
+	append config_of_app "
 					<rom name=\"${vbox_file}\"/>"
-append_if [expr !$use_rumpfs] config_of_app "
+	append_if [expr !$use_rumpfs] config_of_app "
 					<rom name=\"${raw_image}\"/>"
 
-append_if [expr $use_rumpfs || $use_ram_fs] config_of_app {
+	append_if [expr $use_rumpfs || $use_ram_fs] config_of_app {
 					<fs />}
 
-append config_of_app {
+	append config_of_app {
 				</vfs>
 			</libc>
 		</config>
 		<route>}
 
-append_if [expr $use_ram_fs] config_of_app {
-			<service name="File_system">
-				<if-arg key="label" value="from_ram_fs" />
-				<child name="ram_fs"/>
-			</service>}
+	append_if [expr $use_ram_fs] config_of_app {
+			<service name="File_system" label="from_ram_fs"> <child name="ram_fs"/> </service>}
 
-append_if [expr $use_rumpfs] config_of_app {
-			<service name="File_system"> <child name="rump_fs"/> </service>}
-append_if [expr !$use_rumpfs] config_of_app {
-			<service name="Block"> <child name="part_blk"/> </service>}
-append config_of_app {
-			<service name="Framebuffer"> <child name="nit_fb" /> </service>
-			<service name="Input"> <child name="nit_fb" /> </service>
+	append_if [expr $use_rumpfs] config_of_app {
+				<service name="File_system"> <child name="rump_fs"/> </service>}
+	append_if [expr !$use_rumpfs] config_of_app {
+				<service name="Block"> <child name="part_blk"/> </service>}
+	append config_of_app "
+			<service name=\"Framebuffer\"> <child name=\"nit_fb${i}\" /> </service>
+			<service name=\"Input\"> <child name=\"nit_fb${i}\" /> </service>"
+	append config_of_app {
 			<service name="Report"><child name="report_rom" /></service>
 			<service name="ROM">
 				<if-arg key="label" value="usb_devices"/> <child name="report_rom"/>
 			</service>
 			<any-service> <parent/> <any-child /> </any-service>
 		</route>
-	</start>
+	</start>}
 }
 
 source ${genode_dir}/repos/ports/run/virtualbox_auto.inc
@@ -255,11 +313,17 @@ append_if [expr !$use_rumpfs] boot_modules " ${raw_image} "
 
 build_boot_image $boot_modules
 
-run_genode_until {\[init -\> vbox\].*Guest Additions capability report:.*seamless: no, hostWindowMapping: no, graphics: no} 70
+run_genode_until {\[init -\> vbox.*].*Guest Additions capability report:.*seamless: no, hostWindowMapping: no, graphics: no} 70
+# run_genode_until forever 0 [output_spawn_id]
+
 if {$use_rumpfs} {
-	run_genode_until {\[init -\> vbox\].*Guest Additions capability report:.*seamless: yes, hostWindowMapping: no, graphics: yes} 170 [output_spawn_id]
+	set wait_timeout 170
+	for { set i 1 } { $i <= $use_vms } { incr i } {
+		run_genode_until {\[init -\> vbox.*].*Guest Additions capability report:.*seamless: yes, hostWindowMapping: no, graphics: yes} $wait_timeout [output_spawn_id]
+		set wait_timeout 25
+	}
 } else {
-	run_genode_until {\[init\] child "vbox" exited with exit value 0} 60 [output_spawn_id]
+	run_genode_until {\[init\] child "vbox1" exited with exit value 0} 60 [output_spawn_id]
 	# give block driver bit time to write data to disk
 	sleep 5
 }
diff --git a/repos/ports/run/virtualbox_auto.inc b/repos/ports/run/virtualbox_auto.inc
index 5fa25d09e..734002fc7 100644
--- a/repos/ports/run/virtualbox_auto.inc
+++ b/repos/ports/run/virtualbox_auto.inc
@@ -25,6 +25,8 @@ lappend_if [expr $use_usb]    build_components drivers/usb
 lappend_if [expr $use_usb]    build_components app/usb_report_filter
 lappend_if [have_spec x86]    build_components drivers/rtc
 lappend_if [expr $use_ram_fs || $use_usb] build_components server/ram_fs
+lappend_if [expr $use_cpu_load] build_components app/trace_subject_reporter
+lappend_if [expr $use_cpu_load] build_components app/cpu_load_display
 
 source ${genode_dir}/repos/base/run/platform_drv.inc
 # override defaults of platform_drv.inc
@@ -37,7 +39,14 @@ build $build_components
 create_boot_directory
 
 set config {
-<config verbose="yes" prio_levels="4">
+<config verbose="yes" prio_levels="4">}
+
+if {$use_vms > 1} {
+	append config "
+	<affinity-space width=\"${affinity_space_width}\" height=\"1\"/>"
+}
+
+append config {
 	<parent-provides>
 		<service name="ROM"/>
 		<service name="RAM"/>
@@ -52,6 +61,9 @@ set config {
 append_if [have_spec muen] config {
 		<service name="VM"/>}
 
+append_if [expr $use_cpu_load] config {
+		<service name="TRACE"/>}
+
 append config {
 	</parent-provides>
 	<default-route>
@@ -67,10 +79,6 @@ append config {
 		<config>
 			<policy label="part_blk" device="0"/>
 		</config>
-		<route>
-			<service name="IRQ"><child name="acpi_drv"/></service>
-			<any-service> <parent/> <any-child/></any-service>
-		</route>
 	</start>
 	<start name="part_blk" priority="-1">
 		<resource name="RAM" quantum="10M"/>
@@ -82,7 +90,7 @@ append config {
 append_if [expr $use_rumpfs] config {
 			<policy label="rump_fs" partition="4"/>}
 append_if [expr !$use_rumpfs] config {
-			<policy label="vbox -> raw" partition="3"/>}
+			<policy label="vbox1 -> raw" partition="3"/>}
 append config {
 		</config>
 	</start>}
@@ -91,7 +99,8 @@ append_if [expr $use_rumpfs] config {
 	<start name="rump_fs" priority="-1">
 		<resource name="RAM" quantum="32M"/>
 		<provides><service name="File_system"/></provides>
-		<config fs="ext2fs">}
+		<config ld_verbose="yes" fs="ext2fs">}
+
 append_if [expr $use_rumpfs && $use_ram_fs && $use_overlay_from_disk] config {
 			<policy label="overlay_from_disk" root="/ram" writeable="yes"/>}
 append_if [expr $use_rumpfs] config {
@@ -103,18 +112,27 @@ append_if [expr $use_rumpfs] config {
 	</start>}
 
 append_if [expr $use_ram_fs] config {
-	<start name="ram_fs" priority="-1">
-		<resource name="RAM" quantum="512M"/>
+	<start name="ram_fs" priority="-1">}
+append_if [expr $use_ram_fs] config "
+		<resource name=\"RAM\" quantum=\"[expr $use_vms * 3 * 128]M\"/>"
+append_if [expr $use_ram_fs] config {
 		<provides><service name="File_system"/></provides>
 		<config>
-			<content>
-				<dir name="ram"> }
-append_if [expr $use_ram_fs] config "<rom name=\"${overlay_image}\"/>"
+			<content>}
+for { set i 1} { $i <= ${use_vms} } { incr i} {
+append_if [expr $use_ram_fs] config "
+				<dir name=\"ram${i}\">
+					<rom name=\"${overlay_image}\"/>
+				</dir>"
+}
 append_if [expr $use_ram_fs] config {
-				</dir>
 			</content>
-			<!-- constrain sessions according to their labels -->
-			<policy label="vbox -> from_ram_fs" root="/ram" writeable="yes"/>
+			<!-- constrain sessions according to their labels -->}
+for { set i 1} { $i <= ${use_vms} } { incr i} {
+append_if [expr $use_ram_fs] config "
+			<policy label=\"vbox${i} -> from_ram_fs\" root=\"/ram${i}\" writeable=\"yes\"/>"
+}
+append_if [expr $use_ram_fs] config {
 		</config>
 		<route>}
 append_if [expr $use_ram_fs && $use_overlay_from_disk] config "<service name=\"ROM\" label=\"${overlay_image}\">"
@@ -128,7 +146,7 @@ append_if [expr $use_ram_fs] config {
 append_if [expr $use_ram_fs && $use_overlay_from_disk] config {
 	<start name="overlay_from_disk" priority="-1">
 		<binary name="fs_rom"/>
-		<resource name="RAM" quantum="256M"/>
+		<resource name="RAM" quantum="32M"/>
 		<provides><service name="ROM"/></provides>
 		<route>}
 append_if [expr $use_rumpfs && $use_ram_fs && $use_overlay_from_disk] config {
@@ -144,9 +162,31 @@ append_if [expr $use_ps2] config {
 	<start name="ps2_drv" priority="-1">
 		<resource name="RAM" quantum="1M"/>
 		<provides><service name="Input"/></provides>
+		<config/>
+	</start>}
+
+append_if [expr $use_cpu_load] config {
+	<start name="trace_subject_reporter" priority="-1">
+		<resource name="RAM" quantum="6M"/>
+		<config period_ms="500">
+			<report activity="yes" affinity="yes"/>
+		</config>
 		<route>
-			<service name="IRQ"><child name="acpi_drv"/></service>
-			<any-service> <parent/> <any-child/></any-service>
+			<service name="TRACE"><parent/></service>
+			<service name="LOG"><parent/></service>
+			<service name="Timer"><child name="timer"/></service>
+			<service name="Report"><child name="report_rom"/></service>
+		</route>
+	</start>
+
+	<start name="cpu_load_display" priority="-1">
+		<resource name="RAM" quantum="6M"/>
+		<config/>
+		<route>
+			<service name="LOG"><parent/></service>
+			<service name="Timer"><child name="timer"/></service>
+			<service name="ROM" label="trace_subjects"><child name="report_rom"/></service>
+			<service name="Nitpicker"><child name="nitpicker"/></service>
 		</route>
 	</start>}
 
@@ -175,7 +215,7 @@ append_if [expr $use_usb] config {
 				<inline name="usb_report_filter.config">
 <config>
 	<!-- USB device whitelist -->
-	<client label="vbox"/>
+	<client label="vbox1"/>
 	<device vendor_id="0x13fe" product_id="0x5200"/> <!-- platinum stick -->
 	<device vendor_id="0x148f" product_id="0x2573"/> <!-- ralink wifi -->
 	<device vendor_id="0x1f75" product_id="0x0917"/> <!-- intenso stick -->
@@ -242,7 +282,6 @@ append_if [expr $use_usb] config {
 		</provides>
 		<configfile name="usb_drv.config"/>
 		<route>
-			<service name="IRQ"><child name="acpi_drv"/></service>
 			<service name="Report"><child name="report_rom"/></service>
 			<service name="ROM" label="usb_drv.config"><child name="usb_config_rom"/></service>
 			<any-service><parent/><any-child/></any-service>
@@ -289,6 +328,8 @@ lappend_if [expr $use_vbox4] boot_modules virtualbox
 lappend_if [expr $use_vbox5] boot_modules virtualbox5
 lappend_if [expr $use_ram_fs || $use_usb] boot_modules ram_fs
 lappend_if [expr $use_ram_fs && !$use_overlay_from_disk] boot_modules ${overlay_image}
+lappend_if [expr    $use_cpu_load] boot_modules trace_subject_reporter
+lappend_if [expr    $use_cpu_load] boot_modules cpu_load_display
 
 # platform-specific modules
 lappend_if [expr         $use_ps2] boot_modules ps2_drv