Re: [patch/backport] CFS scheduler, -v22, for v2.6.23-rc8, v2.6.22.8, v2.6.21.7, v2.6.20.20
From: Matthew
Date: Sat Sep 29 2007 - 07:11:31 EST
Hi Ingo & everbody on the list,
first of all: many thanks for developing this great scheduler (also:
kudos to Con Kolivas for having developed SD & CK-patchset)
(this is my second mail to this list and I hope I'm doing everything right)
I'm doing some backup during work right now: rsyncing my home
partition (nearly 180 GB) to another harddrive locally &
since I'm running compiz-fusion, openoffice and gnome, therefore am in
some real "working environment" I thought:
give Ingo's new scheduler a test-ride during heavy load ;)
first some impressions:
cpu load balancing looks great again (pretty symmetrical loading on
both cores - it looks pretty similar to 19.1 if not better if I recall
right),
v20 wasn't that "good-looking" ;) (with gnome-system-monitor)
both cpus have a continous load of ~ 70% right now so I'll be
starting up 9 instances of glxgears, below are some output & details
of my system
(cpu frequency switching is disabled since it doesn't work right now
with the current bios version)
short summary: unfortunately after starting glxgears everything
stuttered a lot, don't know if it's expactable during that heavy load
- just wanted to let you know; after having closed each instance of
glxgears, everything was fine again ...
cat /proc/sched_debug
Sched Debug Version: v0.05-v22, 2.6.23-rc8-cfs-v22 #1
now at 3890590.670323 msecs
.sysctl_sched_latency : 20.000000
.sysctl_sched_nr_latency : 0.000020
.sysctl_sched_wakeup_granularity : 2.000000
.sysctl_sched_batch_wakeup_granularity : 25.000000
.sysctl_sched_child_runs_first : 0.000001
.sysctl_sched_features : 3
cpu#0, 2404.249 MHz
.nr_running : 4
.load : 4096
.nr_switches : 7648325
.nr_load_updates : 2103023
.nr_uninterruptible : 58007
.jiffies : 3590591
.next_balance : 3.590615
.curr->pid : 4942
.clock : 2102704.853484
.idle_clock : 0.000000
.prev_clock_raw : 3939505.166968
.clock_warps : 0
.clock_overflows : 1525057
.clock_deep_idle_events : 0
.clock_max_delta : 0.999846
.cpu_load[0] : 3072
.cpu_load[1] : 3148
.cpu_load[2] : 3448
.cpu_load[3] : 3598
.cpu_load[4] : 3612
cfs_rq
.exec_clock : 0.000000
.MIN_vruntime : 705800.821444
.min_vruntime : 705800.818396
.max_vruntime : 705800.821444
.spread : 0.000000
.spread0 : 0.000000
.nr_running : 2
.load : 3072
.nr_spread_over : 0
cfs_rq
.exec_clock : 0.000000
.MIN_vruntime : 114142.324354
.min_vruntime : 705800.818396
.max_vruntime : 114142.460206
.spread : 0.135852
.spread0 : 0.000000
.nr_running : 3
.load : 3072
.nr_spread_over : 0
cfs_rq
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 705800.818396
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : 0.000000
.nr_running : 0
.load : 0
.nr_spread_over : 0
cfs_rq
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 705800.818396
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : 0.000000
.nr_running : 0
.load : 0
.nr_spread_over : 0
cfs_rq
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 705800.818396
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : 0.000000
.nr_running : 1
.load : 1024
.nr_spread_over : 0
runnable tasks:
task PID tree-key switches prio
exec-runtime sum-exec sum-sleep
----------------------------------------------------------------------------------------------------------
X 4043 114142.410694 1413252 120
0 0 0.000000 0.000000
0.000000
glxgears 4938 114142.460206 251121 120
0 0 0.000000 0.000000
0.000000
glxgears 4939 114142.324354 418180 120
0 0 0.000000 0.000000
0.000000
R cat 4942 373113.531317 11 120
0 0 0.000000 0.000000
0.000000
cpu#1, 2404.249 MHz
.nr_running : 4
.load : 4096
.nr_switches : 9227086
.nr_load_updates : 2014314
.nr_uninterruptible : 4294909290
.jiffies : 3590591
.next_balance : 3.590623
.curr->pid : 4932
.clock : 2014009.406851
.idle_clock : 0.000000
.prev_clock_raw : 3939505.462830
.clock_warps : 0
.clock_overflows : 1490105
.clock_deep_idle_events : 0
.clock_max_delta : 0.999845
.cpu_load[0] : 4096
.cpu_load[1] : 4096
.cpu_load[2] : 4102
.cpu_load[3] : 4148
.cpu_load[4] : 4210
cfs_rq
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 582740.765855
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -123060.052541
.nr_running : 1
.load : 1024
.nr_spread_over : 0
cfs_rq
.exec_clock : 0.000000
.MIN_vruntime : 127569.587650
.min_vruntime : 582740.768735
.max_vruntime : 127573.669809
.spread : 4.082159
.spread0 : -123060.049661
.nr_running : 4
.load : 4096
.nr_spread_over : 0
cfs_rq
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 582740.771821
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -123060.046575
.nr_running : 0
.load : 0
.nr_spread_over : 0
cfs_rq
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 582740.774902
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -123060.043494
.nr_running : 0
.load : 0
.nr_spread_over : 0
cfs_rq
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 582740.777696
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -123060.040700
.nr_running : 0
.load : 0
.nr_spread_over : 0
runnable tasks:
task PID tree-key switches prio
exec-runtime sum-exec sum-sleep
----------------------------------------------------------------------------------------------------------
glxgears 4932 127569.592544 440228 120
0 0 0.000000 0.000000
0.000000
glxgears 4933 127569.593334 555188 120
0 0 0.000000 0.000000
0.000000
glxgears 4934 127569.593355 713648 120
0 0 0.000000 0.000000
0.000000
glxgears 4935 127573.669809 419649 120
0 0 0.000000 0.000000
0.000000
cat /proc/meminfo
MemTotal: 2074264 kB
MemFree: 52624 kB
Buffers: 38704 kB
Cached: 1468288 kB
SwapCached: 0 kB
Active: 565544 kB
Inactive: 1378496 kB
HighTotal: 1179136 kB
HighFree: 1976 kB
LowTotal: 895128 kB
LowFree: 50648 kB
SwapTotal: 2698912 kB
SwapFree: 2698516 kB
Dirty: 38508 kB
Writeback: 0 kB
AnonPages: 437052 kB
Mapped: 116140 kB
Slab: 33768 kB
SReclaimable: 16652 kB
SUnreclaim: 17116 kB
PageTables: 3704 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
CommitLimit: 3736044 kB
Committed_AS: 817652 kB
VmallocTotal: 118776 kB
VmallocUsed: 56224 kB
VmallocChunk: 60916 kB
hardware: NVIDIA 7600GT, P5W DH Deluxe, Core2 Duo 6600 "Conroe", 2048
MB Ram (DDR2-800, 6400)
GNU/Gentoo hardened x86 2.6 profile, gcc-4.2.1 hardened; glibc 2.6.1
kernel: 2.6.23-rc8-git3 (+ cfs-devel v22)
9 instances of glxgears, 1 instance of openoffice, 1 instance of
screen, 1 window firefox, gnome-2.20 running
compiz-fusion running (via nvidia GLX_EXT_texture_from_pixmap) ,
nvidia-drivers-100.14.19-r10
/dev/dm-1 reiserfs 213G 175G 38G 83% /home
/dev/dm-2 reiserfs 213G 56G 157G 27% /bak <== rsync -aur
--delete /home/ /bak/
(1st hdd on Intel ICH7R, 2nd hdd on Jmicron; both S-ATA2, ahci)
readahead-cache for both harddrives: 4 MB (via blockdev --setra), 16
MB internal harddisk cache (seagate 7200.10)
I/O-scheduler: deadline scheduler; partition-type: reiserfs v3.6;
mount-options: noatime,nodiratime,data=writeback,commit=120
SLAB: slub
result: most times only 2-3 of the glxgears-windows were running, the
rest was stuttering / halting (no motion)
mouse movement was pretty discountinous, keyboard input was also delayed
Please keep up the good work !
Cheers
Mat
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