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test: Add memory/passt test cases
These show a summary of memory usage in kernel and userspace with different port forwarding configurations, details of userspace usage using 'nm' (passt only uses statically allocated memory), and details of kernel memory from slab reporting facilities. This adds a new test image, mbuto.mem.img, with harcoded IPv4 and IPv6 addresses and routes, and just the tools we need to start and stop passt, to report from /proc/slabinfo, /proc/meminfo, and to print and parse symbol sizes using nm(1). passt can't pivot_root() for sandboxing purposes on ramfs, so we need to create another filesystem and chroot into it, first. We don't want to use pane context functions, as we're checking memory usage for sockets: resort to screen-scraping. Configure a dummy interface to provide passt with an appearance of working IPv4 and IPv6 connectivity, contributed by David. Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Stefano Brivio
parent
ce2a0a5bb4
commit
40fc9e6e7b
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@ -55,7 +55,7 @@ UBUNTU_IMGS = $(UBUNTU_OLD_IMGS) $(UBUNTU_NEW_IMGS)
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DOWNLOAD_ASSETS = mbuto \
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$(DEBIAN_IMGS) $(FEDORA_IMGS) $(OPENSUSE_IMGS) $(UBUNTU_IMGS)
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TESTDATA_ASSETS = small.bin big.bin medium.bin
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LOCAL_ASSETS = mbuto.img QEMU_EFI.fd \
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LOCAL_ASSETS = mbuto.img mbuto.mem.img QEMU_EFI.fd \
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$(DEBIAN_IMGS:%=prepared-%) $(FEDORA_IMGS:%=prepared-%) \
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$(UBUNTU_NEW_IMGS:%=prepared-%) \
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nsholder guest-key guest-key.pub \
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@ -76,6 +76,9 @@ guest-key guest-key.pub:
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mbuto.img: passt.mbuto mbuto guest-key.pub $(TESTDATA_ASSETS)
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./mbuto/mbuto -p ./$< -c lz4 -f $@
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mbuto.mem.img: passt.mem.mbuto mbuto ../passt.avx2
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./mbuto/mbuto -p ./$< -c lz4 -f $@
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nsholder: nsholder.c
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$(CC) $(CFLAGS) -o $@ $^
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@ -81,3 +81,33 @@ layout_pasta_simple() {
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sleep 1
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}
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# layout_memory() - Screen-scraped panes for memory usage tests, big guest pane
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layout_memory() {
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sleep 3
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tmux kill-pane -a -t 0
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cmd_write 0 clear
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tmux split-window -h -l '35%' -t passt_test
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PANE_GUEST=0
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PANE_INFO=1
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get_info_cols
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tmux send-keys -l -t ${PANE_INFO} 'while cat '"$STATEBASE/log_pipe"'; do :; done'
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tmux send-keys -t ${PANE_INFO} -N 100 C-m
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tmux select-pane -t ${PANE_INFO} -T "test log"
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if context_exists guest; then
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pane_watch_contexts ${PANE_GUEST} guest guest
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else
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tmux pipe-pane -O -t ${PANE_GUEST} "cat >> ${LOGDIR}/pane_guest.log"
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tmux select-pane -t ${PANE_GUEST} -T "guest"
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fi
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info_layout "memory usage"
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sleep 1
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}
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@ -13,6 +13,8 @@
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# Copyright (c) 2022 Red Hat GmbH
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# Author: Stefano Brivio <sbrivio@redhat.com>
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INITRAMFS_MEM="${BASEPATH}/mbuto.mem.img"
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# setup_distro() - Set up pane layout for distro tests
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setup_distro() {
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layout_host
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@ -25,6 +27,20 @@ setup_pasta_options() {
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layout_pasta_simple
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}
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# setup_memory() - Start qemu in guest pane, and passt in passt context
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setup_memory() {
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layout_memory
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pane_or_context_run guest 'qemu-system-$(uname -m)' \
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' -machine accel=kvm' \
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' -m '${VMEM}' -cpu host -smp '${VCPUS} \
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' -kernel ' "/boot/vmlinuz-$(uname -r)" \
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' -initrd '${INITRAMFS_MEM}' -nographic -serial stdio' \
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' -nodefaults' \
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' -append "console=ttyS0 mitigations=off apparmor=0"' \
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" -pidfile ${STATESETUP}/qemu.pid"
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}
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# teardown_distro() - Nothing to do, yet
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teardown_distro() {
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:
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@ -36,3 +52,7 @@ teardown_pasta_options() {
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teardown_context_watch ${PANE_PASST} passt
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}
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# teardown_passt() - Kill qemu with ^C, remove passt PID file
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teardown_memory() {
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kill $(cat "${STATESETUP}/qemu.pid")
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}
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187
test/memory/passt
Normal file
187
test/memory/passt
Normal file
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@ -0,0 +1,187 @@
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# SPDX-License-Identifier: AGPL-3.0-or-later
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#
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# PASST - Plug A Simple Socket Transport
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# for qemu/UNIX domain socket mode
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#
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# PASTA - Pack A Subtle Tap Abstraction
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# for network namespace/tap device mode
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#
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# test/memory/passt - Show memory usage of passt in kernel and userspace
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#
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# Copyright (c) 2022 Red Hat GmbH
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# Author: Stefano Brivio <sbrivio@redhat.com>
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gtools sed cat diff nm sort kill tee head tail chroot unshare mount mkdir cp
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def meminfo_row
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gout DIFF meminfo_diff /tmp/meminfo.before /tmp/meminfo.after __WHAT__
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tl __NAME__
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td __DIFF__ 3 0 0
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endef
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def meminfo_reverse_row
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gout DIFF meminfo_diff /tmp/meminfo.after /tmp/meminfo.before __WHAT__
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tl __NAME__
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td __DIFF__ 3 0 0
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endef
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def nm_row
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gout SIZE nm_size /tmp/nm.size __WHAT__
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tl __WHAT__
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td __SIZE__ 6 0 0
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endef
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def slab_row
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gout COUNT slab_diff_count /tmp/slabinfo.before /tmp/slabinfo.after __WHAT__
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gout SIZE slab_size /tmp/slabinfo.before __WHAT__
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gout DIFF slab_diff_size /tmp/slabinfo.before /tmp/slabinfo.after __WHAT__
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tl __WHAT__
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td __COUNT__ 0 0 0
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td __SIZE__ 0 0 0
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td __DIFF__ 6 0 0
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endef
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def start_stop_diff
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guest sed /proc/slabinfo -ne 's/^\([^ ]* *[^ ]* *[^ ]* *[^ ]*\).*/\\\1/p' > /tmp/slabinfo.before
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guest cat /proc/meminfo > /tmp/meminfo.before
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guest /usr/bin/passt.avx2 -l /tmp/log -s /tmp/sock -P /tmp/pid __OPTS__ --netns-only
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sleep 2
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guest cat /proc/meminfo > /tmp/meminfo.after
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guest sed /proc/slabinfo -ne 's/^\([^ ]* *[^ ]* *[^ ]* *[^ ]*\).*/\\\1/p' > /tmp/slabinfo.after
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guest kill \$(cat /tmp/pid)
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guest diff -y --suppress-common-lines /tmp/meminfo.before /tmp/meminfo.after || :
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guest nm -td -Sr --size-sort -P /usr/bin/passt.avx2 | head -30 | tee /tmp/nm.size
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guest sed /proc/slabinfo -ne 's/\(.*<objsize>\).*$/\1/p' | tail -1; (diff -y --suppress-common-lines /tmp/slabinfo.before /tmp/slabinfo.after | sort -grk8)
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endef
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def summary
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info Memory usage summary
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info
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th type MiB
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set WHAT MemFree
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set NAME used
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meminfo_reverse_row
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set WHAT AnonPages
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set NAME userspace
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meminfo_row
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set WHAT Slab
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set NAME kernel
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meminfo_row
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te
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endef
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guest mkdir /test
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guest mount -t tmpfs none /test
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guest mkdir /test/proc /test/dev /test/tmp
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guest mount -o bind /proc /test/proc
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guest mount -o bind /dev /test/dev
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guest cp -Lr /bin /lib /lib64 /usr /sbin /test/
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guest ulimit -Hn 300000
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guest unshare -rUm -R /test
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guest chroot .
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guest meminfo_size() { grep "^$2:" $1 | tr -s ' ' | cut -f2 -d ' '; }
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guest meminfo_diff() { echo $(( $(meminfo_size $2 $3) - $(meminfo_size $1 $3) )); }
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guest nm_size() { grep -m1 "^$2 " $1 | cut -f4 -d ' '; }
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guest slab_count() { grep "^$2 " $1 | tr -s ' ' | cut -f3 -d ' '; }
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guest slab_size() { grep "^$2 " $1 | tr -s ' ' | cut -f4 -d ' '; }
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guest slab_diff_count() { echo $(( $(slab_count $2 $3) - $(slab_count $1 $3) )); }
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guest slab_diff_size() { echo $(( $(slab_count $2 $3) * $(slab_size $2 $3) - $(slab_count $1 $3) * $(slab_size $1 $3) )); }
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test Memory usage: all TCP and UDP ports forwarded, IPv4 and IPv6
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set OPTS -t all -u all
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start_stop_diff
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summary
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info Userspace memory detail
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info
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th symbol MiB
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set WHAT tcp_buf_discard
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nm_row
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set WHAT tcp6_l2_buf
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nm_row
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set WHAT tcp4_l2_buf
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nm_row
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set WHAT tc
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nm_row
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set WHAT pkt_buf
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nm_row
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set WHAT udp_splice_map
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nm_row
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set WHAT udp6_l2_buf
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nm_row
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set WHAT udp4_l2_buf
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nm_row
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set WHAT udp_tap_map
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nm_row
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set WHAT icmp_id_map
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nm_row
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set WHAT udp_splice_buf
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nm_row
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set WHAT tc_hash
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nm_row
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set WHAT pool_tap6_storage
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nm_row
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set WHAT pool_tap4_storage
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nm_row
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set WHAT tap6_l4
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nm_row
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set WHAT tap4_l4
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nm_row
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te
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info Kernel memory detail
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info
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th objects count size MiB
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set WHAT pid
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slab_row
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set WHAT dentry
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slab_row
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set WHAT Acpi-Parse
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slab_row
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set WHAT kmalloc-64
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slab_row
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set WHAT kmalloc-32
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slab_row
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set WHAT lsm_file_cache
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slab_row
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set WHAT filp
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slab_row
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set WHAT anon_vma_chain
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slab_row
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set WHAT ep_head
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slab_row
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set WHAT sock_inode_cache
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slab_row
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set WHAT signal_cache
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slab_row
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set WHAT TCPv6
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slab_row
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set WHAT TCP
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slab_row
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set WHAT UDPv6
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slab_row
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te
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test Memory usage: all TCP ports forwarded, IPv4
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set OPTS -t all -4
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start_stop_diff
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summary
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test Memory usage: all TCP and UDP ports forwarded, IPv4
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set OPTS -t all -u all -4
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start_stop_diff
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summary
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test Memory usage: no ports forwarded
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set OPTS -t none -u none
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start_stop_diff
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summary
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44
test/passt.mem.mbuto
Executable file
44
test/passt.mem.mbuto
Executable file
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@ -0,0 +1,44 @@
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#!/bin/sh
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#
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# SPDX-License-Identifier: AGPL-3.0-or-later
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#
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# PASST - Plug A Simple Socket Transport
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# for qemu/UNIX domain socket mode
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#
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# test/passt.mem.mbuto - mbuto (https://mbuto.sh) profile for memory usage tests
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#
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# Copyright (c) 2022 Red Hat GmbH
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# Author: Stefano Brivio <sbrivio@redhat.com>
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PROGS="${PROGS:-ash,dash,bash chmod ip mount insmod mkdir ln cat chmod modprobe
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grep mknod sed chown sleep bc ls ps mount unshare chroot cp kill diff
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head tail sort tr tee cut nm which}"
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KMODS="${KMODS:- dummy}"
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NODES="${NODES:-console kmsg null ptmx random urandom zero}"
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LINKS="${LINKS:-
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ash,dash,bash /init
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ash,dash,bash /bin/sh}"
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DIRS="${DIRS} /tmp /sbin"
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COPIES="${COPIES} ../passt.avx2,/bin/passt.avx2"
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FIXUP="${FIXUP}"'
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ln -s /bin /usr/bin
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chmod 777 /tmp
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ip link add eth0 type dummy
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ip link set eth0 up
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ip address add 192.0.2.2/24 dev eth0
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ip address add 2001:db8::2/64 dev eth0
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ip route add default via 192.0.2.1
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ip -6 route add default via 2001:db8::1 dev eth0
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sleep 2
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sh +m
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'
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OUTPUT="KERNEL=__KERNEL__
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INITRD=__INITRD__
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"
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