On Tue, Mar 14, 2017 at 06:37:05PM +0000, Tomasz Kłoczko wrote: > Hi, > > Just started looking why in lat few weeks my gnome desktop los a lot of its > previous speed. I found that already it is consequence of some issues in > last chrome. Seems chrome developers managed to kill few most annoying > memory leaks causing that time to time crome processes associated with some > tabs age exploding consuming +2GB memory. > Despite this I found some fact that I was not aware about GDM. > Theoretically GDM should provide just application running on top of raw > X11/Wayland diplay to provide authentication service.I remember that few > years ago it was really like this but seems not it is no longer so simple > picture. > Just simple ps output: > > $ ps auxwf| grep ^gdm*gdm* 2097 0.0 0.0 428140 4220 tty1 > Ssl+ Mar12 0:00 | \_ /usr/libexec/gdm-wayland-session > gnome-session --autostart /usr/share/gdm/greeter/autostart*gdm* > 2102 0.0 0.0 672184 4320 tty1 Sl+ Mar12 0:00 | \_ > /usr/libexec/gnome-session-binary --autostart > /usr/share/gdm/greeter/autostart*gdm* 2109 0.0 0.6 2657052 > 49872 tty1 Sl+ Mar12 1:17 | \_ > /usr/bin/gnome-shell*gdm* 2183 0.0 0.0 260800 7864 tty1 > Sl+ Mar12 0:00 | | \_ /usr/bin/Xwayland :1024 > -rootless -noreset -listen 4 -listen 5 -displayfd 6*gdm* 2222 > 0.0 0.0 459832 3752 tty1 Sl Mar12 0:01 | | \_ > ibus-daemon --xim --panel disable*gdm* 2225 0.0 0.0 382688 > 3348 tty1 Sl Mar12 0:00 | | \_ > /usr/libexec/ibus-dconf*gdm* 2298 0.0 0.0 308892 2732 tty1 > Sl Mar12 0:00 | | \_ > /usr/libexec/ibus-engine-simple*gdm* 2238 0.0 0.0 364388 3072 > tty1 Sl+ Mar12 0:00 | \_ /usr/libexec/gsd-sound*gdm* > 2241 0.0 0.0 481768 6540 tty1 Sl+ Mar12 0:00 | > \_ /usr/libexec/gsd-wacom*gdm* 2242 0.0 0.0 477592 6692 > tty1 Sl+ Mar12 0:00 | \_ > /usr/libexec/gsd-xsettings*gdm* 2246 0.0 0.0 483812 6660 tty1 > Sl+ Mar12 0:00 | \_ > /usr/libexec/gsd-a11y-keyboard*gdm* 2247 0.0 0.0 326508 2712 > tty1 Sl+ Mar12 0:00 | \_ > /usr/libexec/gsd-a11y-settings*gdm* 2248 0.0 0.0 475136 6580 > tty1 Sl+ Mar12 0:00 | \_ > /usr/libexec/gsd-clipboard*gdm* 2249 0.0 0.0 729808 7220 tty1 > Sl+ Mar12 0:20 | \_ /usr/libexec/gsd-color*gdm* > 2250 0.0 0.0 362740 2776 tty1 Sl+ Mar12 0:00 | > \_ /usr/libexec/gsd-datetime*gdm* 2254 0.0 0.0 557560 6376 > tty1 Sl+ Mar12 0:00 | \_ > /usr/libexec/gsd-housekeeping*gdm* 2255 0.0 0.0 557756 6868 > tty1 Sl+ Mar12 0:00 | \_ > /usr/libexec/gsd-keyboard*gdm* 2256 0.0 0.0 537876 6520 tty1 > Sl+ Mar12 0:00 | \_ /usr/libexec/gsd-media-keys*gdm* > 2257 0.0 0.0 326512 2612 tty1 Sl+ Mar12 0:00 | > \_ /usr/libexec/gsd-mouse*gdm* 2261 0.0 0.0 326508 2728 > tty1 Sl+ Mar12 0:00 | \_ > /usr/libexec/gsd-orientation*gdm* 2262 0.0 0.0 578980 6408 > tty1 Sl+ Mar12 0:00 | \_ /usr/libexec/gsd-power*gdm* > 2267 0.0 0.0 521884 6540 tty1 Sl+ Mar12 0:00 | > \_ /usr/libexec/gsd-print-notifications*gdm* 2268 0.0 0.0 > 326524 3352 tty1 Sl+ Mar12 0:00 | \_ > /usr/libexec/gsd-rfkill*gdm* 2269 0.0 0.0 400248 3020 tty1 > Sl+ Mar12 0:00 | \_ > /usr/libexec/gsd-screensaver-proxy*gdm* 2270 0.0 0.0 157972 > 3288 tty1 Sl+ Mar12 0:00 | \_ > /usr/libexec/gsd-sharing*gdm* 2278 0.0 0.0 345124 2772 tty1 > Sl+ Mar12 0:00 | \_ /usr/libexec/gsd-smartcard*gdm* > 2280 0.0 0.0 483980 6444 tty1 Sl+ Mar12 0:00 | > \_ /usr/libexec/gsd-xrandr*gdm* 2906 0.0 0.1 188904 8344 tty1 > S+ Mar12 0:00 | \_ > /usr/libexec/gnome-session-failed*gdm* 1927 0.0 0.0 74532 > 1608 ? Ss Mar12 0:00 /usr/lib/systemd/systemd --user*gdm* > 2090 0.0 0.0 250440 440 ? S Mar12 0:00 \_ > (sd-pam)*gdm* 2100 0.0 0.0 49104 2680 ? Ss Mar12 > 0:00 \_ /usr/bin/dbus-daemon --session --address=systemd: --nofork > --nopidfile --systemd-activation --syslog-only*gdm* 2190 0.0 > 0.0 344848 3208 ? Ssl Mar12 0:00 \_ > /usr/libexec/at-spi-bus-launcher*gdm* 2195 0.0 0.0 48800 > 2628 ? S Mar12 0:00 | \_ /bin/dbus-daemon > --config-file=/usr/share/defaults/at-spi2/accessibility.conf --nofork > --print-address 3*gdm* 2197 0.0 0.0 223708 3720 ? Sl > Mar12 0:00 \_ /usr/libexec/at-spi2-registryd > --use-gnome-session*gdm* 2368 0.0 0.0 187540 2924 ? Sl > Mar12 0:00 \_ /usr/libexec/dconf-service*gdm* 2203 0.0 > 0.0 985696 3872 ? Sl Mar12 0:00 /usr/bin/pulseaudio > --start --log-target=syslog*gdm* 2228 0.0 0.0 482088 6724 > tty1 Sl Mar12 0:00 /usr/libexec/ibus-x11 --kill-daemon This doesn't show much, after being wrapped ;) >From my own machine: root 865 0.0 0.0 696572 6808 ? Ssl Feb26 0:00 /usr/sbin/gdm root 971 0.0 0.0 382540 4916 ? Sl Feb26 0:00 \_ gdm-session-worker [pam/gdm-launch-environment] gdm 982 0.0 0.0 428996 7140 tty1 Ssl+ Feb26 0:00 | \_ /usr/libexec/gdm-wayland-session gnome-session --autostart /usr/sh gdm 987 0.0 0.1 672220 8464 tty1 Sl+ Feb26 0:00 | \_ /usr/libexec/gnome-session-binary --autostart /usr/share/gdm/g gdm 994 0.0 1.1 1902268 88580 tty1 Sl+ Feb26 0:38 | \_ /usr/bin/gnome-shell gdm 1023 0.0 0.2 255492 22712 tty1 Sl+ Feb26 0:00 | | \_ /usr/bin/Xwayland :1024 -rootless -noreset -listen 4 - gdm 1056 0.0 0.0 460020 6076 tty1 Sl Feb26 0:04 | | \_ ibus-daemon --xim --panel disable gdm 1059 0.0 0.0 382424 3352 tty1 Sl Feb26 0:00 | | \_ /usr/libexec/ibus-dconf gdm 1102 0.0 0.0 308624 3572 tty1 Sl Feb26 0:00 | | \_ /usr/libexec/ibus-engine-simple gdm 1082 0.0 0.2 1539020 22484 tty1 Sl+ Feb26 0:06 | \_ /usr/libexec/gnome-settings-daemon >From what I know, gnome developers are working on getting rid of the Xwayland dependency. Once that goes away, things will be a bit more lean. But it's unlikely that all of those processes will go away — e.g. ibus is used for input of various languages, and it's needed. If anything, we'll be moving towards having full-featured graphical input handling earlier and earlier. For example see https://bugzilla.redhat.com/show_bug.cgi?id=1405539 for a discussion how it sucks for users that the kernel console has a completely separate and substandard stack for input in non-ascii languages. > shows that gdm user is running whole set of processes running in full > separated X/Wayland session. It's not so bad really. The next-to-last column is cpu time. It's completely negligible if you consider that this machine has been up since Feb 26. The column before ?/tty1 is RSS, and it's also small. gnome-shell is a bit big with 88MB, but that's the price we pay for feature-full login screen. > Is it really needs to be so complicated? Yeah, mostly. 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