On 09/07/2011 01:48 AM, Martin Dengler wrote:
> On Tue, Sep 06, 2011 at 07:54:17PM +0100, Gordan Bobic wrote:
>> On 09/06/2011 06:53 PM, Mark Wielaard wrote:
>>> On Tue, Sep 06, 2011 at 07:22:37PM +0200, Jan Kratochvil wrote:
>>>> On Tue, 06 Sep 2011 19:15:45 +0200, Kevin Fenzi wrote:
>>>>> Personally, I would consider prelink a 'ok, we have everything working
>>>>> now, and we want to look at making it faster' instead of enabling it
>>>>> before everything is working or building.
>>>>
>>>> I agree That makes sense (although I do not think the prelink issues will be
>>>> ARM specific and they are already resolved on other arches; I may be wrong).
>>>
>>> There could be ARM specific bugs. [...] having the prelink
>>> package available on ARM would at least help us all test and make
>>> sure prelink works as intended. So please do include the package,
>>> if only so people can do some measurements to check whether the
>>> startup speedup is "just" 10% or even up to 50% on their machines.
>>
>> I agree on the dependency and testing part, but I think 10% is
>> optimistic.
>
> I will soon have a few different ARM machines that I can do testing
> on. Please let us know[1] your test suite if you want me to try to
> substantiate your pessimism.
>
> Here is the best reason I've heard for prelink on today's standard,
> memory-constrained ARM device:
>
> http://lists.laptop.org/pipermail/devel/2011-May/032011.html
>
> Please keep at least the option to enable prelinking in Fedora,
> especially before anyone has any performance numbers.
>
>> Gordan
>
> Martin
>
> 1. A wiki page about prelink on ARM would probably be even better than
> a mailing list post. I will start one if nobody beats me to it.
I ran a little experiment with and without prelink using ps_mem.py from
http://www.pixelbeat.org/scripts/ps_mem.py
I booted up the fc13 arm machine and logged in with two terminal windows up and ran ps_mem.py saving the result into a file. The no_prelink_mem.log is the output without prelink and prelink_mem.log is the output after a prelink and reboot. Savings is about 2.7% (107.6MB vs 110.6MB) of the RAM in this trivial case. Generally, see the amount of private memory required for individual executables reduced for the prelinked versions. There were a some that had higher private memory use (bluetoothd, dbus-daemon, and udevd), but that might be more of a result of the quick and dirty benchmarking.
-Will
-Will
Private + Shared = RAM used Program
104.0 KiB + 22.0 KiB = 126.0 KiB gnome-pty-helper
140.0 KiB + 40.0 KiB = 180.0 KiB hald-addon-generic-backlight
156.0 KiB + 28.0 KiB = 184.0 KiB atd
148.0 KiB + 41.0 KiB = 189.0 KiB hald-addon-rfkill-killswitch
160.0 KiB + 43.0 KiB = 203.0 KiB hald-addon-input
172.0 KiB + 35.5 KiB = 207.5 KiB hald-runner
184.0 KiB + 30.0 KiB = 214.0 KiB gam_server
216.0 KiB + 40.5 KiB = 256.5 KiB rtkit-daemon
236.0 KiB + 33.0 KiB = 269.0 KiB rpc.idmapd
156.0 KiB + 137.5 KiB = 293.5 KiB sh
244.0 KiB + 68.5 KiB = 312.5 KiB rpcbind
288.0 KiB + 63.5 KiB = 351.5 KiB xfconfd
300.0 KiB + 85.0 KiB = 385.0 KiB mingetty (5)
312.0 KiB + 76.5 KiB = 388.5 KiB rpc.statd
356.0 KiB + 41.5 KiB = 397.5 KiB ssh-agent
272.0 KiB + 127.0 KiB = 399.0 KiB imsettings-xfce-helper
316.0 KiB + 88.5 KiB = 404.5 KiB gvfsd
332.0 KiB + 75.0 KiB = 407.0 KiB gdm-binary
288.0 KiB + 123.0 KiB = 411.0 KiB gconf-im-settings-daemon
432.0 KiB + 40.5 KiB = 472.5 KiB init
424.0 KiB + 77.0 KiB = 501.0 KiB dbus-launch (2)
452.0 KiB + 53.0 KiB = 505.0 KiB bluetoothd
548.0 KiB + 42.0 KiB = 590.0 KiB rsyslogd
600.0 KiB + 27.5 KiB = 627.5 KiB dhclient
596.0 KiB + 33.0 KiB = 629.0 KiB crond
444.0 KiB + 235.0 KiB = 679.0 KiB avahi-daemon (2)
540.0 KiB + 140.5 KiB = 680.5 KiB sudo
628.0 KiB + 93.0 KiB = 721.0 KiB modem-manager
628.0 KiB + 152.0 KiB = 780.0 KiB wpa_supplicant
256.0 KiB + 548.5 KiB = 804.5 KiB udevd (3)
664.0 KiB + 161.5 KiB = 825.5 KiB xfsettingsd
708.0 KiB + 143.0 KiB = 851.0 KiB upowerd
648.0 KiB + 228.0 KiB = 876.0 KiB im-settings-daemon
884.0 KiB + 36.0 KiB = 920.0 KiB pcscd
704.0 KiB + 232.5 KiB = 936.5 KiB xfce4-notifyd
852.0 KiB + 121.5 KiB = 973.5 KiB gconfd-2
912.0 KiB + 86.5 KiB = 998.5 KiB xscreensaver
788.0 KiB + 220.5 KiB = 1.0 MiB gdm-simple-slave
940.0 KiB + 173.5 KiB = 1.1 MiB console-kit-daemon
960.0 KiB + 208.5 KiB = 1.1 MiB polkitd
1.0 MiB + 127.5 KiB = 1.1 MiB gnome-keyring-daemon
944.0 KiB + 246.5 KiB = 1.2 MiB gdm-session-worker
848.0 KiB + 434.5 KiB = 1.3 MiB abrt-applet
968.0 KiB + 335.0 KiB = 1.3 MiB cupsd
1.0 MiB + 330.5 KiB = 1.3 MiB Thunar
1.0 MiB + 319.0 KiB = 1.3 MiB dbus-daemon (2)
1.0 MiB + 474.5 KiB = 1.4 MiB packagekitd
1.1 MiB + 352.0 KiB = 1.5 MiB xfce4-session
1.2 MiB + 316.0 KiB = 1.5 MiB xfce4-settings-helper
1.0 MiB + 640.5 KiB = 1.6 MiB bash (3)
1.3 MiB + 321.0 KiB = 1.7 MiB NetworkManager
1.9 MiB + 69.5 KiB = 1.9 MiB hald
1.6 MiB + 433.0 KiB = 2.0 MiB xfce4-power-manager
1.7 MiB + 548.5 KiB = 2.2 MiB bluetooth-applet
1.1 MiB + 1.1 MiB = 2.2 MiB sshd (3)
2.0 MiB + 349.5 KiB = 2.3 MiB sendmail.sendmail (2)
1.5 MiB + 883.5 KiB = 2.3 MiB xfwm4
2.2 MiB + 492.5 KiB = 2.6 MiB abrtd
2.2 MiB + 803.5 KiB = 3.0 MiB polkit-gnome-authentication-agent-1 (2)
2.1 MiB + 933.0 KiB = 3.0 MiB gpk-update-icon
2.2 MiB + 1.6 MiB = 3.9 MiB xfce4-menu-plugin
2.7 MiB + 1.3 MiB = 4.0 MiB nm-applet
2.7 MiB + 1.4 MiB = 4.0 MiB xfce4-panel
3.3 MiB + 1.0 MiB = 4.3 MiB Terminal
3.5 MiB + 1.8 MiB = 5.3 MiB xfdesktop
9.4 MiB + 1.4 MiB = 10.8 MiB applet.py
18.7 MiB + 1.2 MiB = 19.9 MiB Xorg
---------------------------------
110.6 MiB
=================================
Private + Shared = RAM used Program
Private + Shared = RAM used Program
92.0 KiB + 20.5 KiB = 112.5 KiB gnome-pty-helper
124.0 KiB + 38.5 KiB = 162.5 KiB hald-addon-generic-backlight
128.0 KiB + 38.5 KiB = 166.5 KiB hald-addon-rfkill-killswitch
144.0 KiB + 39.5 KiB = 183.5 KiB hald-addon-input
156.0 KiB + 28.0 KiB = 184.0 KiB atd
160.0 KiB + 33.0 KiB = 193.0 KiB hald-runner
184.0 KiB + 28.5 KiB = 212.5 KiB gam_server
196.0 KiB + 41.0 KiB = 237.0 KiB rtkit-daemon
136.0 KiB + 122.0 KiB = 258.0 KiB sh
236.0 KiB + 33.0 KiB = 269.0 KiB rpc.idmapd
220.0 KiB + 108.5 KiB = 328.5 KiB gconf-im-settings-daemon
264.0 KiB + 68.5 KiB = 332.5 KiB rpcbind
272.0 KiB + 61.0 KiB = 333.0 KiB xfconfd
220.0 KiB + 116.5 KiB = 336.5 KiB imsettings-xfce-helper
260.0 KiB + 82.5 KiB = 342.5 KiB mingetty (5)
276.0 KiB + 81.0 KiB = 357.0 KiB gvfsd
312.0 KiB + 76.5 KiB = 388.5 KiB rpc.statd
316.0 KiB + 73.5 KiB = 389.5 KiB gdm-binary
356.0 KiB + 42.5 KiB = 398.5 KiB ssh-agent
408.0 KiB + 41.0 KiB = 449.0 KiB init
392.0 KiB + 73.0 KiB = 465.0 KiB dbus-launch (2)
516.0 KiB + 37.0 KiB = 553.0 KiB rsyslogd
560.0 KiB + 58.0 KiB = 618.0 KiB bluetoothd
600.0 KiB + 29.5 KiB = 629.5 KiB dhclient
596.0 KiB + 34.0 KiB = 630.0 KiB crond
444.0 KiB + 187.0 KiB = 631.0 KiB avahi-daemon (2)
520.0 KiB + 134.5 KiB = 654.5 KiB wpa_supplicant
540.0 KiB + 161.5 KiB = 701.5 KiB sudo
612.0 KiB + 95.5 KiB = 707.5 KiB modem-manager
584.0 KiB + 148.5 KiB = 732.5 KiB xfsettingsd
556.0 KiB + 207.0 KiB = 763.0 KiB im-settings-daemon
604.0 KiB + 181.0 KiB = 785.0 KiB xfce4-notifyd
272.0 KiB + 521.0 KiB = 793.0 KiB udevd (3)
680.0 KiB + 133.5 KiB = 813.5 KiB upowerd
856.0 KiB + 35.0 KiB = 891.0 KiB pcscd
820.0 KiB + 116.0 KiB = 936.0 KiB gconfd-2
856.0 KiB + 92.5 KiB = 948.5 KiB xscreensaver
768.0 KiB + 194.0 KiB = 962.0 KiB gdm-simple-slave
748.0 KiB + 321.5 KiB = 1.0 MiB abrt-applet
908.0 KiB + 164.0 KiB = 1.0 MiB console-kit-daemon
960.0 KiB + 120.5 KiB = 1.1 MiB gnome-keyring-daemon
936.0 KiB + 199.5 KiB = 1.1 MiB polkitd
904.0 KiB + 247.0 KiB = 1.1 MiB gdm-session-worker
900.0 KiB + 282.5 KiB = 1.2 MiB Thunar
888.0 KiB + 423.0 KiB = 1.3 MiB packagekitd
1.0 MiB + 301.0 KiB = 1.3 MiB xfce4-session
980.0 KiB + 354.0 KiB = 1.3 MiB cupsd
1.1 MiB + 264.5 KiB = 1.3 MiB xfce4-settings-helper
1.1 MiB + 319.0 KiB = 1.4 MiB dbus-daemon (2)
924.0 KiB + 635.0 KiB = 1.5 MiB bash (3)
1.3 MiB + 311.0 KiB = 1.6 MiB NetworkManager
1.8 MiB + 67.5 KiB = 1.9 MiB hald
1.5 MiB + 413.0 KiB = 1.9 MiB xfce4-power-manager
1.6 MiB + 508.0 KiB = 2.0 MiB bluetooth-applet
1.4 MiB + 845.5 KiB = 2.2 MiB xfwm4
1.1 MiB + 1.1 MiB = 2.2 MiB sshd (3)
2.0 MiB + 349.5 KiB = 2.3 MiB sendmail.sendmail (2)
2.0 MiB + 473.0 KiB = 2.5 MiB abrtd
1.9 MiB + 861.5 KiB = 2.8 MiB gpk-update-icon
2.1 MiB + 781.5 KiB = 2.8 MiB polkit-gnome-authentication-agent-1 (2)
2.5 MiB + 1.2 MiB = 3.7 MiB nm-applet
2.2 MiB + 1.6 MiB = 3.7 MiB xfce4-menu-plugin
3.3 MiB + 1.0 MiB = 4.3 MiB Terminal
3.2 MiB + 1.4 MiB = 4.6 MiB xfce4-panel
3.4 MiB + 1.8 MiB = 5.2 MiB xfdesktop
9.4 MiB + 1.5 MiB = 10.8 MiB applet.py
18.7 MiB + 1.2 MiB = 19.8 MiB Xorg
---------------------------------
107.6 MiB
=================================
Private + Shared = RAM used Program
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