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xorg-server 1.16 seems to use much more memory that the previous versions (and generally sucks ;P), but maybe just its memory use reporting has changed.
https://www.archlinux.org/packages/comm … ny/ps_mem/
https://github.com/pixelb/ps_mem/
It's a 32-bit system.
# ps_mem -p 362
Private + Shared = RAM used Program
333.9 MiB + -7156.5 KiB = 326.9 MiB firefox
---------------------------------
326.9 MiB
=================================
# ps_mem -p 253
Private + Shared = RAM used Program
173.9 MiB + 2.0 MiB = 175.9 MiB Xorg.bin
---------------------------------
175.9 MiB
=================================
# free -m
total used free shared buffers cached
Mem: 997 861 135 174 44 442
-/+ buffers/cache: 374 622
Swap: 258 0 258Can someone interpret these results for me?
Does using zswap has any effect on memory use reporting?
http://stackoverflow.com/questions/1313 … or-process or https://bbs.archlinux.org/viewtopic.php?id=184496 leave me with even more questions and a headache.
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doesn't look good compared to 1.15.2-1 on x86_64:
# ps_mem -p 588
Private + Shared = RAM used Program
13.2 MiB + 5.9 MiB = 19.2 MiB Xorg
---------------------------------
19.2 MiB
=================================I don't know how you want your results interpreted. Looks like ps_mem should report actual per application memory usage quite accurately.
it's been my impression that zswap usage doesn't show up as swap in free or other memory usage monitors, so the zswap pool would probably show up as cached mem.
I haven't confirmed this in any way, but I've noticed that after enabling zswap my system barely uses swap any more.
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I've noticed a bit of slowdown when the swap needs to be populated, but it's not at all bad, no thrashing.
swap use will depend on swappiness and vfs_cache_pressure settings.
Firefox and X use over half of available RAM, yet 'free' reposts only 374 MB being used. Why is that?
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Firefox and X use over half of available RAM, yet 'free' reposts only 374 MB being used. Why is that?
good point. That actually could be caused by zswap, if it is displayed as 'cached' memory as I'm suspecting, and it was actually being used at the time (/sys/kernel/debug/zswap/stored_pages > 0).
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If you want me to test something, please tell me how exactly and what should I do.
# swapon -s
Filename Type Size Used Priority
/dev/sda2 partition 265068 0 -1
# cat /sys/kernel/debug/zswap/stored_pages
0
# grep . /sys/kernel/debug/zswap/*
/sys/kernel/debug/zswap/duplicate_entry:0
/sys/kernel/debug/zswap/pool_limit_hit:0
/sys/kernel/debug/zswap/pool_pages:0
/sys/kernel/debug/zswap/reject_alloc_fail:0
/sys/kernel/debug/zswap/reject_compress_poor:0
/sys/kernel/debug/zswap/reject_kmemcache_fail:0
/sys/kernel/debug/zswap/reject_reclaim_fail:0
/sys/kernel/debug/zswap/stored_pages:0
/sys/kernel/debug/zswap/written_back_pages:0Offline
What does "smem -kt" show, karol?
Stuff in zswap shows (used to?) as used swap and is also counted in the "used" field, I think (conversely, stuff in tmpfs is counted as cache, if I am not mistaken). You can indeed see debug info about it in /sys/kernel/debug/zswap/.
Did Xorg 1.16 change the name of its process from X to Xorg.bin?
xrestop can show some info about X server's memory usage.
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# cat /sys/kernel/debug/zswap/stored_pages
0
well.. basically this means there are no pages stored in zswap pool at the time.
my understanding is that zswap pool isn't included in used mem -buffers/cached.
if some memory allocated by Xorg or firefox were zswapped, that would have an effect on the 'free' ouput, but apparently this is not the case.
EDIT: did some testing: apparently zswap shows up as used swap after all. thanks to lucke for correction.
sorry about that :(
Last edited by ooo (2014-07-23 15:55:03)
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I'm scratching my head and banging it against the wall. I've developed a nice rhythm ;-)
It's Xorg.bin now:
$ pacman -Qo Xorg.bin
/usr/bin/Xorg.bin is owned by xorg-server 1.16.0-2$ smem -kt
PID User Command Swap USS PSS RSS
315 karol dwmst 0 160.0K 272.0K 2.1M
296 karol xinit /home/karol/.xinitrc 0 176.0K 279.0K 1.9M
516 karol dbus-launch --autolaunch=0d 0 244.0K 347.0K 1.9M
279 karol /bin/sh /usr/bin/startx 0 292.0K 413.0K 2.9M
522 karol /usr/bin/dbus-daemon --fork 0 216.0K 479.0K 1.9M
300 karol dwm 0 336.0K 562.0K 3.1M
263 karol /usr/lib/systemd/systemd -- 0 408.0K 923.0K 3.1M
419 karol bash 0 848.0K 995.0K 3.8M
411 karol bash 0 860.0K 1004.0K 3.8M
2850 karol bash 0 860.0K 1007.0K 3.9M
3651 karol bash 0 864.0K 1011.0K 3.8M
422 karol bash 0 852.0K 1016.0K 4.0M
417 karol bash 0 856.0K 1017.0K 3.9M
267 karol -bash 0 856.0K 1018.0K 3.9M
425 karol bash 0 852.0K 1019.0K 4.0M
415 karol bash 0 856.0K 1021.0K 3.9M
330 karol -bash 0 860.0K 1022.0K 4.0M
443 karol vim -p 0 0 4.0M 4.1M 6.7M
5934 karol python2 /usr/bin/smem -kt 0 5.3M 5.4M 7.3M
316 karol urxvtd 0 22.7M 25.5M 33.1M
573 karol /usr/lib/firefox/plugin-con 0 22.0M 32.7M 48.0M
297 karol /usr/bin/Xorg.bin -nolisten 0 123.7M 124.8M 128.9M
452 karol firefox 0 232.0M 245.9M 265.4M
-------------------------------------------------------------------------------
23 1 0 419.8M 451.5M 545.5M $ sudo ps_mem
Private + Shared = RAM used Program
116.0 KiB + 44.0 KiB = 160.0 KiB atd
144.0 KiB + 52.5 KiB = 196.5 KiB vnstatd
164.0 KiB + 33.5 KiB = 197.5 KiB gpm
156.0 KiB + 48.5 KiB = 204.5 KiB acpid
188.0 KiB + 63.0 KiB = 251.0 KiB systemd-resolved
160.0 KiB + 127.0 KiB = 287.0 KiB dwmst
176.0 KiB + 119.5 KiB = 295.5 KiB xinit
244.0 KiB + 121.0 KiB = 365.0 KiB dbus-launch
292.0 KiB + 131.0 KiB = 423.0 KiB startx
336.0 KiB + 249.0 KiB = 585.0 KiB dwm
644.0 KiB + 67.0 KiB = 711.0 KiB systemd-networkd
672.0 KiB + 72.5 KiB = 744.5 KiB systemd-logind
932.0 KiB + 120.0 KiB = 1.0 MiB systemd-udevd
736.0 KiB + 419.5 KiB = 1.1 MiB (sd-pam)
552.0 KiB + 659.0 KiB = 1.2 MiB dbus-daemon (2)
876.0 KiB + 587.0 KiB = 1.4 MiB su (3)
1.2 MiB + 378.5 KiB = 1.6 MiB sudo
944.0 KiB + 712.0 KiB = 1.6 MiB login (2)
996.0 KiB + 1.3 MiB = 2.2 MiB systemd (2)
4.0 MiB + 195.5 KiB = 4.2 MiB vim
8.1 MiB + 109.0 KiB = 8.2 MiB systemd-journald
11.1 MiB + 2.1 MiB = 13.2 MiB bash (13)
26.1 MiB + 5.6 MiB = 31.6 MiB urxvtd (3)
20.9 MiB + 11.4 MiB = 32.3 MiB plugin-container
123.7 MiB + 1.2 MiB = 124.9 MiB Xorg.bin
230.7 MiB + 14.2 MiB = 244.9 MiB firefox
---------------------------------
473.9 MiB
=================================Wrt xrestop, how do you drive this thing?
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Install xrestop, run xrestop (if it works with X 1.16), look at the "Pixmaps:" line.
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xrestop - Display: localhost:0
Monitoring 11 clients. XErrors: 0
Pixmaps: 33867K total, Other: 36K total, All: 33903K total
res-base Wins GCs Fnts Pxms Misc Pxm mem Other Total PID Identifier
0c00000 43 36 1 147 339 23118K 10K 23129K 452 Library
0000000 1 0 2 0 84 10060K 3K 10063K ? CPU 7% MEM 354 851 VOL 1% Wed Jul 23 18:
0800000 20 11 5 10 116 598K 8K 607K 316 urxvt
0400000 1 2 5 1 277 90K 11K 101K ? <unknown>
1000000 5 26 0 1 10 12B 984B 996B 573 plugin-container
1200000 1 3 0 0 7 0B 264B 264B 8392 mpv - foobar.mp4
1400000 1 1 0 0 0 0B 48B 48B ? xrestop
0a00000 1 1 0 0 0 0B 48B 48B ? <unknown>
0e00000 0 1 0 0 0 0B 24B 24B ? <unknown>
0600000 0 1 0 0 0 0B 24B 24B ? <unknown>
0200000 0 1 0 0 0 0B 24B 24B ? <unknown>Does this mean X is using just 33 MB?
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Well, in my case xrestop shows total of pixmaps slightly greater than the RSS of X shown by smem ;-) Hm, maybe not if you take swapped out parts into account.
If something is leaking memory and X's memory usage is steadily increasing, it can (usually?) be seen in xrestop. Other than that, I don't exactly know what's the relationship of data shown by xrestop to X's and other processes' memory usage.
What's your GPU/driver? What's your resolution? It can have an impact on memory usage, I presume. Using a compositing window manager might change things too.
Last edited by lucke (2014-07-23 16:58:47)
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I'm using dwm, need no stinkin' composting manager.
$ lspci | grep -i vga
00:02.0 VGA compatible controller: Intel Corporation 82845G/GL[Brookdale-G]/GE Chipset Integrated Graphics Device (rev 01)@1280x1024, xf86-video-intel 2.99.912-4.
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There's 2.99.913 in the testing repo now, maybe it makes a difference.
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I'm using my version of dwmst, which I took IIRC from Unia: https://github.com/Unia/dwmst I'll go w/o and see if it makes a difference.
(I think) xrestop shows it uses a lot of mem (it's the second line, between 'Library' and 'urxvt').
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I think my dwmst script was leaking / hogging memory.
now ps_mem and 'free -m' show the same amount of memory used, Xorg.bin uses 10-15 MB.
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