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.
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.
Signed-off-by: Stefano Brivio <sbrivio(a)redhat.com>
---
test/Makefile | 5 +-
test/lib/layout_ugly | 39 +++++++++
test/lib/setup_ugly | 35 ++++++++
test/memory/passt | 187 +++++++++++++++++++++++++++++++++++++++++++
test/run | 4 +
5 files changed, 269 insertions(+), 1 deletion(-)
create mode 100644 test/memory/passt
diff --git a/test/Makefile b/test/Makefile
index 91498ff..9f2bc42 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -55,7 +55,7 @@ UBUNTU_IMGS = $(UBUNTU_OLD_IMGS) $(UBUNTU_NEW_IMGS)
DOWNLOAD_ASSETS = mbuto \
$(DEBIAN_IMGS) $(FEDORA_IMGS) $(OPENSUSE_IMGS) $(UBUNTU_IMGS)
TESTDATA_ASSETS = small.bin big.bin medium.bin
-LOCAL_ASSETS = mbuto.img QEMU_EFI.fd \
+LOCAL_ASSETS = mbuto.img mbuto.mem.img QEMU_EFI.fd \
$(DEBIAN_IMGS:%=prepared-%) $(FEDORA_IMGS:%=prepared-%) \
$(UBUNTU_NEW_IMGS:%=prepared-%) \
nsholder guest-key guest-key.pub \
@@ -76,6 +76,9 @@ guest-key guest-key.pub:
mbuto.img: passt.mbuto mbuto guest-key.pub $(TESTDATA_ASSETS)
./mbuto/mbuto -p ./$< -c lz4 -f $@
+mbuto.mem.img: passt.mem.mbuto mbuto ../passt.avx2
+ ./mbuto/mbuto -p ./$< -c lz4 -f $@
+
nsholder: nsholder.c
$(CC) $(CFLAGS) -o $@ $^
diff --git a/test/lib/layout_ugly b/test/lib/layout_ugly
index 9397b7d..d62d337 100644
--- a/test/lib/layout_ugly
+++ b/test/lib/layout_ugly
@@ -81,3 +81,42 @@ layout_pasta_simple() {
sleep 1
}
+
+# layout_memory() - Screen-scraped panes for memory usage tests, big guest pane
+layout_memory() {
+ sleep 3
+
+ tmux kill-pane -a -t 0
+ cmd_write 0 clear
+
+ tmux split-window -h -l '35%' -t passt_test
+ tmux split-window -v -l '15%' -t passt_test
+
+ PANE_PASST=2
+ PANE_GUEST=0
+ PANE_INFO=1
+
+ get_info_cols
+
+ tmux send-keys -l -t ${PANE_INFO} 'while cat
'"$STATEBASE/log_pipe"'; do :; done'
+ tmux send-keys -t ${PANE_INFO} -N 100 C-m
+ tmux select-pane -t ${PANE_INFO} -T "test log"
+
+ if context_exists guest; then
+ pane_watch_contexts ${PANE_GUEST} guest guest
+ else
+ tmux pipe-pane -O -t ${PANE_GUEST} "cat >> ${LOGDIR}/pane_guest.log"
+ tmux select-pane -t ${PANE_GUEST} -T "guest"
+ fi
+
+ if context_exists passt; then
+ pane_watch_contexts ${PANE_PASST} passt passt
+ else
+ tmux pipe-pane -O -t ${PANE_PASST} "cat >> ${LOGDIR}/pane_passt.log"
+ tmux select-pane -t ${PANE_PASST} -T "passt"
+ fi
+
+ info_layout "memory usage"
+
+ sleep 1
+}
diff --git a/test/lib/setup_ugly b/test/lib/setup_ugly
index 764177e..c62ea9b 100755
--- a/test/lib/setup_ugly
+++ b/test/lib/setup_ugly
@@ -25,6 +25,30 @@ setup_pasta_options() {
layout_pasta_simple
}
+# setup_memory() - Start qemu in guest pane, and passt in passt context
+setup_memory() {
+ context_setup_host passt
+
+ layout_memory
+
+ context_run passt "./passt -P ${STATESETUP}/passt.pid"
+
+ # pidfile isn't created until passt is listening
+ wait_for [ -f "${STATESETUP}/passt.pid" ]
+
+ pane_or_context_run guest './qrap 5 qemu-system-$(uname -m)' \
+ ' -machine accel=kvm' \
+ ' -m '${VMEM}' -cpu host -smp '${VCPUS} \
+ ' -kernel ' "/boot/vmlinuz-$(uname -r)" \
+ ' -initrd '${INITRAMFS_MEM}' -nographic -serial stdio' \
+ ' -nodefaults' \
+ ' -append "console=ttyS0 mitigations=off apparmor=0 ' \
+ 'virtio-net.napi_tx=1"' \
+ " -device virtio-net-pci,netdev=hostnet0,x-txburst=16384" \
+ " -netdev socket,fd=5,id=hostnet0" \
+ " -pidfile ${STATESETUP}/qemu.pid"
+}
+
# teardown_distro() - Nothing to do, yet
teardown_distro() {
:
@@ -36,3 +60,14 @@ teardown_pasta_options() {
teardown_context_watch ${PANE_PASST} passt
}
+# teardown_passt() - Kill qemu with ^C, remove passt PID file
+teardown_memory() {
+ kill $(cat "${STATESETUP}/qemu.pid")
+
+ rm "${STATESETUP}/passt.pid"
+
+ tmux send-keys -t ${PANE_PASST} "C-c"
+
+ teardown_context_watch ${PANE_PASST} passt
+ teardown_context_watch ${PANE_GUEST} qemu
+}
diff --git a/test/memory/passt b/test/memory/passt
new file mode 100644
index 0000000..fa89821
--- /dev/null
+++ b/test/memory/passt
@@ -0,0 +1,187 @@
+# SPDX-License-Identifier: AGPL-3.0-or-later
+#
+# PASST - Plug A Simple Socket Transport
+# for qemu/UNIX domain socket mode
+#
+# PASTA - Pack A Subtle Tap Abstraction
+# for network namespace/tap device mode
+#
+# test/memory/passt - Show memory usage of passt in kernel and userspace
+#
+# Copyright (c) 2022 Red Hat GmbH
+# Author: Stefano Brivio <sbrivio(a)redhat.com>
+
+gtools sed cat diff nm sort kill tee head tail chroot unshare mount mkdir cp
+
+def meminfo_row
+gout DIFF meminfo_diff /tmp/meminfo.before /tmp/meminfo.after __WHAT__
+tl __NAME__
+td __DIFF__ 3 0 0
+endef
+
+def meminfo_reverse_row
+gout DIFF meminfo_diff /tmp/meminfo.after /tmp/meminfo.before __WHAT__
+tl __NAME__
+td __DIFF__ 3 0 0
+endef
+
+def nm_row
+gout SIZE nm_size /tmp/nm.size __WHAT__
+tl __WHAT__
+td __SIZE__ 6 0 0
+endef
+
+def slab_row
+gout COUNT slab_diff_count /tmp/slabinfo.before /tmp/slabinfo.after __WHAT__
+gout SIZE slab_size /tmp/slabinfo.before __WHAT__
+gout DIFF slab_diff_size /tmp/slabinfo.before /tmp/slabinfo.after __WHAT__
+tl __WHAT__
+td __COUNT__ 0 0 0
+td __SIZE__ 0 0 0
+td __DIFF__ 6 0 0
+endef
+
+def start_stop_diff
+guest sed /proc/slabinfo -ne 's/^\([^ ]* *[^ ]* *[^ ]* *[^ ]*\).*/\\\1/p' >
/tmp/slabinfo.before
+guest cat /proc/meminfo > /tmp/meminfo.before
+guest /usr/bin/passt.avx2 -l /tmp/log -s /tmp/sock -P /tmp/pid __OPTS__ --netns-only
+sleep 2
+guest cat /proc/meminfo > /tmp/meminfo.after
+guest sed /proc/slabinfo -ne 's/^\([^ ]* *[^ ]* *[^ ]* *[^ ]*\).*/\\\1/p' >
/tmp/slabinfo.after
+guest kill \$(cat /tmp/pid)
+guest diff -y --suppress-common-lines /tmp/meminfo.before /tmp/meminfo.after || :
+guest nm -td -Sr --size-sort -P /usr/bin/passt.avx2 | head -30 | tee /tmp/nm.size
+guest sed /proc/slabinfo -ne 's/\(.*<objsize>\).*$/\1/p' | tail -1; (diff
-y --suppress-common-lines /tmp/slabinfo.before /tmp/slabinfo.after | sort -grk8)
+endef
+
+def summary
+info Memory usage summary
+info
+th type MiB
+set WHAT MemFree
+set NAME used
+meminfo_reverse_row
+set WHAT AnonPages
+set NAME userspace
+meminfo_row
+set WHAT Slab
+set NAME kernel
+meminfo_row
+te
+endef
+
+
+guest mkdir /test
+guest mount -t tmpfs none /test
+guest mkdir /test/proc /test/dev /test/tmp
+guest mount -o bind /proc /test/proc
+guest mount -o bind /dev /test/dev
+guest cp -Lr /bin /lib /lib64 /usr /sbin /test/
+
+guest ulimit -Hn 300000
+guest unshare -rUm -R /test
+guest chroot .
+
+guest meminfo_size() { grep "^$2:" $1 | tr -s ' ' | cut -f2 -d '
'; }
+guest meminfo_diff() { echo $(( $(meminfo_size $2 $3) - $(meminfo_size $1 $3) )); }
+
+guest nm_size() { grep -m1 "^$2 " $1 | cut -f4 -d ' '; }
+
+guest slab_count() { grep "^$2 " $1 | tr -s ' ' | cut -f3 -d '
'; }
+guest slab_size() { grep "^$2 " $1 | tr -s ' ' | cut -f4 -d '
'; }
+guest slab_diff_count() { echo $(( $(slab_count $2 $3) - $(slab_count $1 $3) )); }
+guest slab_diff_size() { echo $(( $(slab_count $2 $3) * $(slab_size $2 $3) - $(slab_count
$1 $3) * $(slab_size $1 $3) )); }
+
+
+test Memory usage: all TCP and UDP ports forwarded, IPv4 and IPv6
+set OPTS -t all -u all
+start_stop_diff
+summary
+
+info Userspace memory detail
+info
+th symbol MiB
+set WHAT tcp_buf_discard
+nm_row
+set WHAT tcp6_l2_buf
+nm_row
+set WHAT tcp4_l2_buf
+nm_row
+set WHAT tc
+nm_row
+set WHAT pkt_buf
+nm_row
+set WHAT udp_splice_map
+nm_row
+set WHAT udp6_l2_buf
+nm_row
+set WHAT udp4_l2_buf
+nm_row
+set WHAT udp_tap_map
+nm_row
+set WHAT icmp_id_map
+nm_row
+set WHAT udp_splice_buf
+nm_row
+set WHAT tc_hash
+nm_row
+set WHAT pool_tap6_storage
+nm_row
+set WHAT pool_tap4_storage
+nm_row
+set WHAT tap6_l4
+nm_row
+set WHAT tap4_l4
+nm_row
+te
+
+info Kernel memory detail
+info
+th objects count size MiB
+set WHAT pid
+slab_row
+set WHAT dentry
+slab_row
+set WHAT Acpi-Parse
+slab_row
+set WHAT kmalloc-64
+slab_row
+set WHAT kmalloc-32
+slab_row
+set WHAT lsm_file_cache
+slab_row
+set WHAT filp
+slab_row
+set WHAT anon_vma_chain
+slab_row
+set WHAT ep_head
+slab_row
+set WHAT sock_inode_cache
+slab_row
+set WHAT signal_cache
+slab_row
+set WHAT TCPv6
+slab_row
+set WHAT TCP
+slab_row
+set WHAT UDPv6
+slab_row
+te
+
+
+test Memory usage: all TCP ports forwarded, IPv4
+set OPTS -t all -4
+start_stop_diff
+summary
+
+
+test Memory usage: all TCP and UDP ports forwarded, IPv4
+set OPTS -t all -u all -4
+start_stop_diff
+summary
+
+
+test Memory usage: no ports forwarded
+set OPTS -t none -u none
+start_stop_diff
+summary
diff --git a/test/run b/test/run
index c3486b9..e07513f 100755
--- a/test/run
+++ b/test/run
@@ -79,6 +79,10 @@ run() {
test pasta_options/log_to_file
teardown pasta_options
+ setup memory
+ test memory/passt
+ teardown memory
+
setup passt
test passt/ndp
test passt/dhcp
--
2.35.1