* Peter Lieven (p...@kamp.de) wrote: > Hi, > > while upgrading from Qemu 2.2.0 to Qemu 2.5.1.1 I noticed that the RSS memory > usage has heavily increased. > We use hugepages so the RSS memory does not include VM memory. In Qemu 2.2.0 > it used to be ~30MB per vServer > and increased to up to 300 - 400MB for Qemu 2.5.1.1 (same with master). The > memory increases over time, but seems > not to grow indefinetly. I tried to bisect, but had no result so far that > made sense. I also tried valgrind / massif, but > valgrind does not see the allocation (at least at exit) and massif fails to > rund due to - so it pretends - heap corruption. > > Any help or ideas how to debug further would be appreciated.
I think I'd try stripping devices off; can you get a similar difference to happen with a guest with no USB, no hugepages, no VGA and a simple locally stored IDE disk? If you're having trouble bisecting is it possible it's a change in one of the libraries it's linked against? There was someone asking the other day on #qemu who had a setup that was apparently using much more RAM than expected and we didn't manage to track it down but I can't remember the version being used. Dave > > Cmdline is: > ./x86_64-softmmu/qemu-system-x86_64 -enable-kvm -M pc-i440fx-2.1 -nodefaults > -netdev type=tap,id=guest3,script=no,downscript=no,ifname=tap0,vnet_hdr > -device virtio-net-pci,netdev=guest3,mac=52:54:00:ff:08:5e -iscsi > initiator-name=iqn.2005-03.org.xx:0025b5d0011f -drive > format=raw,discard=on,file=iscsi://172.21.200.56/iqn.2001-05.com.equallogic:0-8a0906-98f384e0a-7d2004ee0a85767a-00lieven-test/0,if=none,cache=writeback,aio=native,id=disk0 > -object iothread,id=iothread0 -device > virtio-blk-pci,drive=disk0,iothread=iothread0 -global > virtio-blk-pci.scsi=off -serial null -parallel null -m 4096 -smp > 4,sockets=1,cores=4,threads=1 -monitor tcp:0:4004,server,nowait,nodelay -qmp > tcp:0:3004,server,nowait,nodelay -name lieven-test -boot > order=c,once=dc,menu=off -k de -mem-path /hugepages -mem-prealloc -cpu > Westmere,enforce -rtc base=utc -usb -usbdevice tablet -no-hpet -vga vmware > > Thanks, > Peter > > -- Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK
