[mythtv-users] USB video input card
Greg Cope
gregcope at gmail.com
Sun Nov 22 16:48:33 UTC 2009
2009/11/22 Sasha Sirotkin <Sasha.Sirotkin at comsysmobile.com>:
> Do you have any idea what is the CPU load in such scenario ? R3610 is
> not widely available yet, so I'm thinking of getting the older AR1600
> model
Where are you - there are loads available, and the R3610 is cheaper
than the other models (in the UK at least) for some odd reasons.
Load is not a great indicator of work, as it is just a running average
of the run queue - which on a Host that appears as 4 CPUs this is not
great) indication of busyness.
Just a short test recording one DVB program;
iostat 5 -x (skipp 1st few lines);
avg-cpu: %user %nice %system %iowait %steal %idle
4.31 0.00 0.58 1.36 0.00 93.76
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s
avgrq-sz avgqu-sz await svctm %util
sdb 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
sda 0.00 140.00 0.00 6.80 0.00 1166.40
171.53 0.07 9.71 8.24 5.60
sdd 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
sr0 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
uptime
16:33:30 up 1:31, 3 users, load average: 0.32, 0.49, 0.56
Although CPU usage is minimal (93.76% idle) the load is a around 0.56
(however on an SMP host I would divide this by no of CPUs to get a
clearer "load") which is equal more like "0.14" (0.56/4) which is
still above CPU util.
vmstat 5(ignore 1st line as this is since boot);
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
0 0 0 14708 46120 1281348 0 0 15 147 141 275 3 1 94 2
0 0 0 13832 46132 1282160 0 0 0 525 584 1122 5 0 93 1
0 0 0 14808 46124 1281276 0 0 0 718 577 1069 4 1 93 2
0 0 0 13816 46132 1282012 0 0 0 632 585 1124 5 1 93 1
0 0 0 14684 46120 1280836 0 0 0 470 582 1113 4 1 94 1
0 0 0 15304 46104 1280240 0 0 0 513 594 1165 5 1 93 1
0 0 0 14312 46128 1281136 0 0 0 573 583 1119 5 1 93 1
sudo atop 5
ATOP - s 2009/11/22 16:41:46 5 seconds elapsed
PRC | sys 0.17s | user 1.08s | #proc 188 | #zombie 5 | #exit 0 |
CPU | sys 3% | user 20% | irq 0% | idle 371% | wait 6% |
cpu | sys 1% | user 7% | irq 0% | idle 86% | cpu000 w 6% |
cpu | sys 0% | user 13% | irq 0% | idle 87% | cpu003 w 0% |
cpu | sys 1% | user 0% | irq 0% | idle 98% | cpu001 w 0% |
cpu | sys 1% | user 0% | irq 0% | idle 99% | cpu002 w 0% |
CPL | avg1 0.80 | avg5 0.61 | avg15 0.57 | csw 5865 | intr 3075 |
MEM | tot 1.7G | free 13.4M | cache 1.2G | buff 45.0M | slab 66.0M |
SWP | tot 7.5G | free 7.5G | | vmcom 968.0M | vmlim 8.3G |
PAG | scan 896 | stall 0 | | swin 0 | swout 0 |
DSK | sda | busy 6% | read 0 | write 39 | avio 7 ms |
DSK | sdb | busy 1% | read 0 | write 7 | avio 5 ms |
NET | transport | tcpi 2 | tcpo 2 | udpi 0 | udpo 0 |
NET | network | ipi 2 | ipo 2 | ipfrw 0 | deliv 2 |
NET | eth0 0% | pcki 2 | pcko 2 | si 0 Kbps | so 5 Kbps |
PID SYSCPU USRCPU VGROW RGROW RDDSK WRDSK ST EXC S CPU CMD 1/1
1830 0.00s 0.71s 0K 0K 0K 0K -- - S 13% mythfrontend.r
1226 0.11s 0.34s 0K 0K 0K 3740K -- - S 9% mythbackend
3570 0.06s 0.03s 400K 400K 0K 0K -- - R 2% atop
3369 0.00s 0.00s 0K 0K 0K 0K -- - S 0% hald-addon-sto
1329 0.00s 0.00s 0K 0K 0K 0K -- - S 0% hald-addon-sto
365 0.00s 0.00s 0K 0K 0K 4K -- - S 0% kjournald2
600 0.00s 0.00s 0K 0K 0K 16K -- - S 0% kjournald2
Recording 2 streams;
iostat -x 5
avg-cpu: %user %nice %system %iowait %steal %idle
5.10 0.00 2.04 2.38 0.00 90.47
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s
avgrq-sz avgqu-sz await svctm %util
sdb 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
sda 0.00 272.20 0.00 12.00 0.00 2257.60
188.13 0.26 21.67 9.83 11.80
sdd 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
sr0 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
greg at s:~$ vmstat 5
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
2 0 0 15116 45512 1235156 0 0 14 149 143 279 3 1 94 2
2 0 0 15216 45516 1234964 0 0 0 1124 962 1821 5 2 91 3
0 0 0 14348 45504 1236080 0 0 0 1070 932 1870 6 1 91 2
0 0 0 15216 45480 1235120 0 0 0 1347 966 1880 6 2 90 3
0 0 0 14844 45480 1235432 0 0 0 1041 933 1863 6 1 91 2
0 0 0 13712 45512 1236484 0 0 0 1022 946 1822 5 2 91 2
^C
greg at s:~$ uptime
16:46:52 up 1:44, 3 users, load average: 0.90, 0.77, 0.63
ATOP - s 2009/11/22 16:45:08 5 seconds elapsed
PRC | sys 0.35s | user 1.13s | #proc 189 | #zombie 5 | #exit 0 |
CPU | sys 6% | user 22% | irq 1% | idle 362% | wait 9% |
cpu | sys 4% | user 11% | irq 1% | idle 75% | cpu000 w 8% |
cpu | sys 1% | user 9% | irq 0% | idle 89% | cpu002 w 1% |
cpu | sys 0% | user 1% | irq 0% | idle 99% | cpu003 w 0% |
cpu | sys 1% | user 0% | irq 0% | idle 98% | cpu001 w 0% |
CPL | avg1 0.88 | avg5 0.69 | avg15 0.60 | csw 9148 | intr 4813 |
MEM | tot 1.7G | free 14.3M | cache 1.2G | buff 44.6M | slab 65.0M |
SWP | tot 7.5G | free 7.5G | | vmcom 1.0G | vmlim 8.3G |
PAG | scan 1248 | stall 0 | | swin 0 | swout 0 |
DSK | sda | busy 11% | read 0 | write 55 | avio 10 ms |
DSK | sdb | busy 1% | read 0 | write 5 | avio 10 ms |
NET | transport | tcpi 1 | tcpo 1 | udpi 0 | udpo 0 |
NET | network | ipi 1 | ipo 1 | ipfrw 0 | deliv 1 |
NET | eth0 0% | pcki 1 | pcko 1 | si 0 Kbps | so 2 Kbps |
PID SYSCPU USRCPU VGROW RGROW RDDSK WRDSK ST EXC S CPU CMD 1/1
1830 0.16s 0.54s 0K 0K 0K 0K -- - S 13% mythfrontend.r
1226 0.11s 0.55s 0K 0K 0K 5104K -- - S 13% mythbackend
3582 0.07s 0.02s 0K 0K 0K 0K -- - R 2% atop
1637 0.00s 0.01s 0K 0K 0K 0K -- - S 0% mysqld
1821 0.00s 0.01s 0K 0K 0K 0K -- - S 0% xfce4-panel
47 0.01s 0.00s 0K 0K 0K 0K -- - S 0% kswapd0
1372 0.00s 0.00s 0K 0K 0K 0K -- - S 0% Xorg
1819 0.00s 0.00s 0K 0K 0K 0K -- - S 0% xfwm4
1065 0.00s 0.00s 0K 0K 0K 0K -- - S 0% ntpd
3369 0.00s 0.00s 0K 0K 0K 0K -- - S 0% hald-addon-sto
365 0.00s 0.00s 0K 0K 0K 4K -- - S 0% kjournald2
600 0.00s 0.00s 0K 0K 0K 2216K -- - S 0% kjournald2
I'll do more test later;
- Record 1 stream, watch 1 recording
- Record 1 stream, watch live TV
- Record 2 streams, watch 1 recording
But in Summary on my dual core host I see minimal CPU use most of the
time, but I do see "Load"
Greg
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