fedora 14 kernel performance with ip forwarding workload
by Jesse Brandeburg
The other day I was running the stock fedora kernel on my ip
forwarding setup, to see what the performance was, and the performance
wasn't very good.
system is S5520HC dual socket 2.93GHz Xeon 5570 (Nehalem) with 3 quad
port 82580 adapters (12 ports). Traffic is bidirectional 64 byte
packets being forwarded and received on each port, basically port to
port routing. I am only using 12 flows currently.
The driver is igb, and I am using an affinity script that lines up
each pair of ports that are forwarding traffic into optimal
configurations for cache locality. I am also disabling
remote_node_defrag_ratio to stop cross node traffic.
With the fedora default kernel from F14 it appears that
CONFIG_NETFILTER=y means that I cannot unload all of netfilter even if
I stop iptables service.
perf showed netfilter being prominent, and removing it gives me much
higher throughput. Is there a reason CONFIG_NETFILTER=y ? Isn't it a
good thing to be able to disable netfilter if you want to?
Jesse
8 years, 10 months
Issue with 3.8.0-0.rc5.git2.1.fc19 and rv280 based video card
by Bruno Wolff III
I tried 3.8.0-0.rc5.git2.1.fc19 on three systems. One without X, one using
an rv530 based video card and one using an rv280 based video card. The
system using the rv280 based card has either extremely slow graphics or
busted graphics. The other two seem to function normally. On the rv280
based system it takes longer than normal to sort of get the gdm screen up.
It comes up without the background graphic and when I click on the user
it doesn't seem to return a password prompt in a reasonable time. C-A-F2
still works and I can use a vt normally. In one case when I switched back
I saw the background image. So it may be that video is just running really
slow.
Things work OK with 3.8.0-0.rc5.git1.1.fc19.
When there is a nodebug version of that kernel out, I'll try it to see
if it is the ATOMIC_SLEEP debugging or some other change in the kernel
causing the problem.
11 years, 2 months
[PATCH] Drop the old Adaptec AIC7xxx driver
by Paul Bolle
Ever since v2.4.3 this driver is advertised as not being under active
development. It's main advantage to most users will be the warnings it
generates at build time:
drivers/scsi/aic7xxx_old.c: In function ‘aic7xxx_register’:
drivers/scsi/aic7xxx_old.c:7901:5: warning: case value ‘257’ not in enumerated type ‘ahc_chip’ [-Wswitch]
drivers/scsi/aic7xxx_old.c:7898:5: warning: case value ‘513’ not in enumerated type ‘ahc_chip’ [-Wswitch]
drivers/scsi/aic7xxx_old.c: In function ‘aic7xxx_load_seeprom’:
drivers/scsi/aic7xxx_old.c:8517:5: warning: case value ‘257’ not in enumerated type ‘ahc_chip’ [-Wswitch]
drivers/scsi/aic7xxx_old.c:8510:5: warning: case value ‘513’ not in enumerated type ‘ahc_chip’ [-Wswitch]
Let's drop this old driver.
Signed-off-by: Paul Bolle <pebolle(a)tiscali.nl>
---
0) I'm trying to get my kernel builds (which use the Fedora kernel
config) warning free. Upstream declined the brilliant fix to silence
these warnings (see https://lkml.org/lkml/2012/9/21/104 ).
1) Plan B is to simply drop this old driver in the Fedora kernel
altogether. That should silence these warnings too, shouldn't it? But is
dropping this old driver acceptable?
2) This patch is entirely untested.
config-generic | 1 -
1 file changed, 1 deletion(-)
diff --git a/config-generic b/config-generic
index 4a8015f..5cc8f8d 100644
--- a/config-generic
+++ b/config-generic
@@ -341,7 +341,6 @@ CONFIG_SCSI_3W_9XXX=m
CONFIG_SCSI_ACARD=m
CONFIG_SCSI_AACRAID=m
CONFIG_SCSI_AIC7XXX=m
-CONFIG_SCSI_AIC7XXX_OLD=m
CONFIG_AIC7XXX_CMDS_PER_DEVICE=4
CONFIG_AIC7XXX_RESET_DELAY_MS=15000
# CONFIG_AIC7XXX_BUILD_FIRMWARE is not set
--
1.7.11.7
11 years, 2 months
Debug slowness test results
by Adam Williamson
Hey, folks. I've discussed this with jwb on IRC, but mailing it too to
make sure the results don't get lost. I tested all the recent kernel
builds on my nouveau (9600 GT) desktop and a selection on my Intel
laptop, using gtkperf and x11perf (x11perf at ajax's request) as quick
and dirty benchmarks, and got the following results. gtkperf tracks very
closely with my subjective perception of performance - when the gtkperf
numbers jump, those are the kernels that feel very slow to me. I don't
really perceive the jumps that are unique to x11perf numbers.
It seems pretty clear from these numbers that slub_debug is the biggest
offender for me, according to jwb. I didn't put the results in the chart
for some reason, but on the nouveau machine just like the intel one,
rc5.git1 with slub_debug=- as a kernel parameter gives a fast gtkperf
time - in the 2.4-2.5 range - and 'feels' perfectly fine, that's what
I'm running right now.
nouveau:
3.7.4-204.fc18.x86_64
---------------------
GtkPerf 0.40 - Starting testing: Wed Jan 30 10:19:54 2013
GtkEntry - time: 0.05
GtkComboBox - time: 0.52
GtkComboBoxEntry - time: 0.41
GtkSpinButton - time: 0.11
GtkProgressBar - time: 0.10
GtkToggleButton - time: 0.10
GtkCheckButton - time: 0.04
GtkRadioButton - time: 0.05
GtkTextView - Add text - time: 0.09
GtkTextView - Scroll - time: 0.11
GtkDrawingArea - Lines - time: 0.24
GtkDrawingArea - Circles - time: 0.23
GtkDrawingArea - Text - time: 0.21
GtkDrawingArea - Pixbufs - time: 0.13
---
Total time: 2.38
Sync time adjustment is 0.0455 msecs.
200000000 reps @ 0.0000 msec (30100000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (28200000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (27400000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (24700000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (31400000.0/sec): X protocol NoOperation
1000000000 trep @ 0.0000 msec (28200000.0/sec): X protocol NoOperation
600000 reps @ 0.0084 msec (119000.0/sec): QueryPointer
600000 reps @ 0.0084 msec (119000.0/sec): QueryPointer
600000 reps @ 0.0083 msec (121000.0/sec): QueryPointer
600000 reps @ 0.0086 msec (116000.0/sec): QueryPointer
600000 reps @ 0.0086 msec (116000.0/sec): QueryPointer
3000000 trep @ 0.0085 msec (118000.0/sec): QueryPointer
3.8.0-0.rc4.git1.1.fc19.x86_64
------------------------------
GtkPerf 0.40 - Starting testing: Wed Jan 30 10:12:54 2013
GtkEntry - time: 0.03
GtkComboBox - time: 0.60
GtkComboBoxEntry - time: 0.46
GtkSpinButton - time: 0.11
GtkProgressBar - time: 0.09
GtkToggleButton - time: 0.09
GtkCheckButton - time: 0.04
GtkRadioButton - time: 0.05
GtkTextView - Add text - time: 0.09
GtkTextView - Scroll - time: 0.11
GtkDrawingArea - Lines - time: 0.23
GtkDrawingArea - Circles - time: 0.22
GtkDrawingArea - Text - time: 0.20
GtkDrawingArea - Pixbufs - time: 0.13
---
Total time: 2.45
3.8.0-0.rc4.git3.1.fc19.x86_64
------------------------------
GtkPerf 0.40 - Starting testing: Wed Jan 30 10:15:10 2013
GtkEntry - time: 0.03
GtkComboBox - time: 0.59
GtkComboBoxEntry - time: 0.45
GtkSpinButton - time: 0.12
GtkProgressBar - time: 0.09
GtkToggleButton - time: 0.09
GtkCheckButton - time: 0.04
GtkRadioButton - time: 0.05
GtkTextView - Add text - time: 0.09
GtkTextView - Scroll - time: 0.11
GtkDrawingArea - Lines - time: 0.24
GtkDrawingArea - Circles - time: 0.22
GtkDrawingArea - Text - time: 0.20
GtkDrawingArea - Pixbufs - time: 0.16
---
Total time: 2.47
Sync time adjustment is 0.0187 msecs.
200000000 reps @ 0.0000 msec (32600000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (32300000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (32700000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (32700000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (32700000.0/sec): X protocol NoOperation
1000000000 trep @ 0.0000 msec (32600000.0/sec): X protocol NoOperation
600000 reps @ 0.0087 msec (115000.0/sec): QueryPointer
600000 reps @ 0.0092 msec (109000.0/sec): QueryPointer
600000 reps @ 0.0089 msec (113000.0/sec): QueryPointer
600000 reps @ 0.0085 msec (118000.0/sec): QueryPointer
600000 reps @ 0.0081 msec (123000.0/sec): QueryPointer
3000000 trep @ 0.0087 msec (115000.0/sec): QueryPointer
3.8.0-0.rc4.git4.1.fc19.x86_64
------------------------------
GtkPerf 0.40 - Starting testing: Wed Jan 30 10:40:23 2013
GtkEntry - time: 0.03
GtkComboBox - time: 0.58
GtkComboBoxEntry - time: 0.46
GtkSpinButton - time: 0.14
GtkProgressBar - time: 0.11
GtkToggleButton - time: 0.11
GtkCheckButton - time: 0.04
GtkRadioButton - time: 0.05
GtkTextView - Add text - time: 0.09
GtkTextView - Scroll - time: 0.12
GtkDrawingArea - Lines - time: 0.23
GtkDrawingArea - Circles - time: 0.22
GtkDrawingArea - Text - time: 0.20
GtkDrawingArea - Pixbufs - time: 0.15
---
Total time: 2.52
Sync time adjustment is 0.0280 msecs.
200000000 reps @ 0.0000 msec (27100000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (28800000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (30900000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (30500000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (31200000.0/sec): X protocol NoOperation
1000000000 trep @ 0.0000 msec (29600000.0/sec): X protocol NoOperation
400000 reps @ 0.0141 msec ( 71200.0/sec): QueryPointer
400000 reps @ 0.0140 msec ( 71500.0/sec): QueryPointer
400000 reps @ 0.0140 msec ( 71300.0/sec): QueryPointer
400000 reps @ 0.0142 msec ( 70200.0/sec): QueryPointer
400000 reps @ 0.0136 msec ( 73800.0/sec): QueryPointer
2000000 trep @ 0.0140 msec ( 71600.0/sec): QueryPointer
3.8.0-0.rc4.git5.1.fc19.x86_64
------------------------------
GtkPerf 0.40 - Starting testing: Wed Jan 30 10:17:20 2013
GtkEntry - time: 0.09
GtkComboBox - time: 1.27
GtkComboBoxEntry - time: 1.11
GtkSpinButton - time: 0.65
GtkProgressBar - time: 0.54
GtkToggleButton - time: 0.59
GtkCheckButton - time: 0.14
GtkRadioButton - time: 0.17
GtkTextView - Add text - time: 0.19
GtkTextView - Scroll - time: 0.63
GtkDrawingArea - Lines - time: 0.48
GtkDrawingArea - Circles - time: 0.36
GtkDrawingArea - Text - time: 0.20
GtkDrawingArea - Pixbufs - time: 0.50
---
Total time: 6.93
Sync time adjustment is 0.1662 msecs.
200000000 reps @ 0.0000 msec (29400000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (29700000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (29800000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (29800000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (29100000.0/sec): X protocol NoOperation
1000000000 trep @ 0.0000 msec (29600000.0/sec): X protocol NoOperation
200000 reps @ 0.0335 msec ( 29900.0/sec): QueryPointer
200000 reps @ 0.0333 msec ( 30000.0/sec): QueryPointer
200000 reps @ 0.0337 msec ( 29600.0/sec): QueryPointer
200000 reps @ 0.0334 msec ( 30000.0/sec): QueryPointer
200000 reps @ 0.0334 msec ( 29900.0/sec): QueryPointer
1000000 trep @ 0.0335 msec ( 29900.0/sec): QueryPointer
3.8.0-0.rc5.git0.1.fc19.x86_64
------------------------------
GtkPerf 0.40 - Starting testing: Wed Jan 30 10:50:58 2013
GtkEntry - time: 0.09
GtkComboBox - time: 1.22
GtkComboBoxEntry - time: 1.08
GtkSpinButton - time: 0.64
GtkProgressBar - time: 0.54
GtkToggleButton - time: 0.59
GtkCheckButton - time: 0.13
GtkRadioButton - time: 0.16
GtkTextView - Add text - time: 0.20
GtkTextView - Scroll - time: 0.62
GtkDrawingArea - Lines - time: 0.50
GtkDrawingArea - Circles - time: 0.35
GtkDrawingArea - Text - time: 0.20
GtkDrawingArea - Pixbufs - time: 0.49
---
Total time: 6.82
Sync time adjustment is 0.2343 msecs.
200000000 reps @ 0.0000 msec (29500000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (29500000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (29600000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (29400000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (29400000.0/sec): X protocol NoOperation
1000000000 trep @ 0.0000 msec (29500000.0/sec): X protocol NoOperation
60000 reps @ 0.0963 msec ( 10400.0/sec): QueryPointer
60000 reps @ 0.0931 msec ( 10700.0/sec): QueryPointer
60000 reps @ 0.0850 msec ( 11800.0/sec): QueryPointer
60000 reps @ 0.0935 msec ( 10700.0/sec): QueryPointer
60000 reps @ 0.0665 msec ( 15000.0/sec): QueryPointer
300000 trep @ 0.0869 msec ( 11500.0/sec): QueryPointer
3.8.0-0.rc5.git1.1.fc19.x86_64
------------------------------
GtkPerf 0.40 - Starting testing: Wed Jan 30 10:10:01 2013
GtkEntry - time: 0.10
GtkComboBox - time: 1.57
GtkComboBoxEntry - time: 1.49
GtkSpinButton - time: 0.64
GtkProgressBar - time: 0.55
GtkToggleButton - time: 0.60
GtkCheckButton - time: 0.14
GtkRadioButton - time: 0.17
GtkTextView - Add text - time: 0.20
GtkTextView - Scroll - time: 0.64
GtkDrawingArea - Lines - time: 0.49
GtkDrawingArea - Circles - time: 0.33
GtkDrawingArea - Text - time: 0.19
GtkDrawingArea - Pixbufs - time: 0.55
---
Total time: 7.67
Sync time adjustment is 0.0854 msecs.
200000000 reps @ 0.0000 msec (26100000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (28600000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (29500000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (29500000.0/sec): X protocol NoOperation
200000000 reps @ 0.0000 msec (29200000.0/sec): X protocol NoOperation
1000000000 trep @ 0.0000 msec (28500000.0/sec): X protocol NoOperation
70000 reps @ 0.0911 msec ( 11000.0/sec): QueryPointer
70000 reps @ 0.0694 msec ( 14400.0/sec): QueryPointer
70000 reps @ 0.0812 msec ( 12300.0/sec): QueryPointer
70000 reps @ 0.0905 msec ( 11000.0/sec): QueryPointer
70000 reps @ 0.0538 msec ( 18600.0/sec): QueryPointer
350000 trep @ 0.0772 msec ( 13000.0/sec): QueryPointer
intel:
x11perf -noop -pointer
3.7.4-204.fc18.x86_64
---------------------
GtkPerf 0.40 - Starting testing: Wed Jan 30 14:49:59 2013
GtkEntry - time: 0.07
GtkComboBox - time: 1.01
GtkComboBoxEntry - time: 0.83
GtkSpinButton - time: 0.17
GtkProgressBar - time: 0.14
GtkToggleButton - time: 0.16
GtkCheckButton - time: 0.07
GtkRadioButton - time: 0.10
GtkTextView - Add text - time: 0.17
GtkTextView - Scroll - time: 0.13
GtkDrawingArea - Lines - time: 1.24
GtkDrawingArea - Circles - time: 0.89
GtkDrawingArea - Text - time: 0.86
GtkDrawingArea - Pixbufs - time: 0.17
---
Total time: 6.01
Sync time adjustment is 0.0731 msecs.
80000000 reps @ 0.0001 msec (14500000.0/sec): X protocol NoOperation
80000000 reps @ 0.0001 msec (18200000.0/sec): X protocol NoOperation
80000000 reps @ 0.0001 msec (18100000.0/sec): X protocol NoOperation
80000000 reps @ 0.0001 msec (18500000.0/sec): X protocol NoOperation
80000000 reps @ 0.0001 msec (18300000.0/sec): X protocol NoOperation
400000000 trep @ 0.0001 msec (17400000.0/sec): X protocol NoOperation
300000 reps @ 0.0186 msec ( 53700.0/sec): QueryPointer
300000 reps @ 0.0188 msec ( 53300.0/sec): QueryPointer
300000 reps @ 0.0183 msec ( 54600.0/sec): QueryPointer
300000 reps @ 0.0188 msec ( 53300.0/sec): QueryPointer
300000 reps @ 0.0208 msec ( 48100.0/sec): QueryPointer
1500000 trep @ 0.0191 msec ( 52500.0/sec): QueryPointer
3.8.0-0.rc4.git3.1.fc19.x86_64
------------------------------
GtkPerf 0.40 - Starting testing: Wed Jan 30 14:59:53 2013
GtkEntry - time: 0.06
GtkComboBox - time: 1.16
GtkComboBoxEntry - time: 0.87
GtkSpinButton - time: 0.13
GtkProgressBar - time: 0.12
GtkToggleButton - time: 0.16
GtkCheckButton - time: 0.06
GtkRadioButton - time: 0.10
GtkTextView - Add text - time: 0.17
GtkTextView - Scroll - time: 0.13
GtkDrawingArea - Lines - time: 1.46
GtkDrawingArea - Circles - time: 0.69
GtkDrawingArea - Text - time: 1.04
GtkDrawingArea - Pixbufs - time: 0.21
---
Total time: 6.37
Sync time adjustment is 0.0983 msecs.
100000000 reps @ 0.0001 msec (17800000.0/sec): X protocol NoOperation
100000000 reps @ 0.0001 msec (17700000.0/sec): X protocol NoOperation
100000000 reps @ 0.0001 msec (17400000.0/sec): X protocol NoOperation
100000000 reps @ 0.0001 msec (17700000.0/sec): X protocol NoOperation
100000000 reps @ 0.0001 msec (17500000.0/sec): X protocol NoOperation
500000000 trep @ 0.0001 msec (17600000.0/sec): X protocol NoOperation
300000 reps @ 0.0199 msec ( 50100.0/sec): QueryPointer
300000 reps @ 0.0207 msec ( 48300.0/sec): QueryPointer
300000 reps @ 0.0237 msec ( 42300.0/sec): QueryPointer
300000 reps @ 0.0203 msec ( 49300.0/sec): QueryPointer
300000 reps @ 0.0246 msec ( 40600.0/sec): QueryPointer
1500000 trep @ 0.0218 msec ( 45800.0/sec): QueryPointer
3.8.0-0.rc5.git1.1.fc19.x86_64
------------------------------
GtkPerf 0.40 - Starting testing: Wed Jan 30 14:38:11 2013
GtkEntry - time: 0.08
GtkComboBox - time: 1.71
GtkComboBoxEntry - time: 1.28
GtkSpinButton - time: 0.18
GtkProgressBar - time: 0.17
GtkToggleButton - time: 0.18
GtkCheckButton - time: 0.07
GtkRadioButton - time: 0.11
GtkTextView - Add text - time: 0.25
GtkTextView - Scroll - time: 0.13
GtkDrawingArea - Lines - time: 1.56
GtkDrawingArea - Circles - time: 2.28
GtkDrawingArea - Text - time: 3.61
GtkDrawingArea - Pixbufs - time: 0.39
---
Total time: 12.00
Sync time adjustment is 0.6224 msecs.
80000000 reps @ 0.0001 msec (15800000.0/sec): X protocol NoOperation
80000000 reps @ 0.0001 msec (16000000.0/sec): X protocol NoOperation
80000000 reps @ 0.0001 msec (14300000.0/sec): X protocol NoOperation
80000000 reps @ 0.0001 msec (15700000.0/sec): X protocol NoOperation
80000000 reps @ 0.0001 msec (16100000.0/sec): X protocol NoOperation
400000000 trep @ 0.0001 msec (15600000.0/sec): X protocol NoOperation
30000 reps @ 0.1975 msec ( 5060.0/sec): QueryPointer
30000 reps @ 0.2022 msec ( 4940.0/sec): QueryPointer
30000 reps @ 0.1993 msec ( 5020.0/sec): QueryPointer
30000 reps @ 0.2016 msec ( 4960.0/sec): QueryPointer
30000 reps @ 0.1998 msec ( 5010.0/sec): QueryPointer
150000 trep @ 0.2001 msec ( 5000.0/sec): QueryPointer
3.8.0-0.rc5.git1.1.fc19.x86_64 slub_debug=-
-------------------------------------------
GtkPerf 0.40 - Starting testing: Wed Jan 30 14:45:05 2013
GtkEntry - time: 0.10
GtkComboBox - time: 1.04
GtkComboBoxEntry - time: 0.72
GtkSpinButton - time: 0.16
GtkProgressBar - time: 0.16
GtkToggleButton - time: 0.21
GtkCheckButton - time: 0.07
GtkRadioButton - time: 0.12
GtkTextView - Add text - time: 0.19
GtkTextView - Scroll - time: 0.15
GtkDrawingArea - Lines - time: 1.42
GtkDrawingArea - Circles - time: 1.14
GtkDrawingArea - Text - time: 1.03
GtkDrawingArea - Pixbufs - time: 0.21
---
Total time: 6.73
Sync time adjustment is 0.1575 msecs.
90000000 reps @ 0.0001 msec (17100000.0/sec): X protocol NoOperation
90000000 reps @ 0.0001 msec (17000000.0/sec): X protocol NoOperation
90000000 reps @ 0.0001 msec (16900000.0/sec): X protocol NoOperation
90000000 reps @ 0.0001 msec (17300000.0/sec): X protocol NoOperation
90000000 reps @ 0.0001 msec (17100000.0/sec): X protocol NoOperation
450000000 trep @ 0.0001 msec (17100000.0/sec): X protocol NoOperation
200000 reps @ 0.0497 msec ( 20100.0/sec): QueryPointer
200000 reps @ 0.0476 msec ( 21000.0/sec): QueryPointer
200000 reps @ 0.0474 msec ( 21100.0/sec): QueryPointer
200000 reps @ 0.0469 msec ( 21300.0/sec): QueryPointer
200000 reps @ 0.0463 msec ( 21600.0/sec): QueryPointer
1000000 trep @ 0.0476 msec ( 21000.0/sec): QueryPointer
--
Adam Williamson
Fedora QA Community Monkey
IRC: adamw | Twitter: AdamW_Fedora | identi.ca: adamwfedora
http://www.happyassassin.net
11 years, 2 months
More debugging feedback
by Bruno Wolff III
I have just done some updates while running 3.8.0-0.rc5.git0.1.fc19. A couple
of these machines were booted with slub_debug=- . They all seemed a bit
slower (based on my watching the updates and not real benchmarks) than with
with the previous debug kernels. It isn't quite to show stopping slow, but
it's getting close. It might be the slowness I see with debugging
kernels for yum updates, is due to a combination of multiple debugging
features rather than a single one.
11 years, 2 months
A problem for my fedora 17 booting
by thomas1997ster
hello,
Recently my fedora 17 system has a problem in booting. The error is the below:
plymouthd: ply-array.c:82: ply_array_get_size:Assertion `array->element_type==PLY_ARRAY_ELEMENT_TYPE_POINTER || array->element_type==PLY_ARRAY_ELEMENT_TYPE_UINT32` failed
what does it mean?
thomas1997ster
11 years, 2 months
slub debug isn't that bad
by Bruno Wolff III
After doing some more yum updates, I am not finding the slub debugging in
3.8.0-0.rc4.git5.1.fc19 to be that bad. At most it is a little slower.
11 years, 2 months
Fedora Kernel Meeting Minutes for Jan 25, 2013
by Josh Boyer
==============================
#fedora-meeting: Fedora Kernel
==============================
Meeting started by jwb at 19:02:11 UTC. The full logs are available at
http://meetbot.fedoraproject.org/fedora-meeting/2013-01-25/fedora-kernel....
.
Meeting summary
---------------
* init (jwb, 19:02:32)
* Checkpoint/Restore (jwb, 19:04:11)
* LINK: https://fedoraproject.org/wiki/Features/Checkpoint_Restore
(jwb, 19:04:22)
* ACTION: jwb to discuss getting some testcases with adrianr (jwb,
19:08:48)
* plan is to enable soon, without relying on CONFIG_EXPERT (small
patch) (jwb, 19:09:04)
* rawhide kernel debug options (jwb, 19:09:48)
* lockdep + spinlock seemed fine. today has slub debug and needs
feedback (jwb, 19:13:24)
* coprs (jwb, 19:18:49)
* ACTION: jwb to try more copr builds for kernels this/next week
(jwb, 19:22:25)
* open floor (jwb, 19:24:11)
* administriva (jwb, 19:28:50)
* rawhide on 3.8-rc4.git5. continuing through 3.8-rcX (jwb,
19:29:04)
* F18/F17 on 3.7.4. 3.7.5 coming soon, with possible intel fixes for
hangs (jwb, 19:29:25)
* F16 heading towards EOL. possibly one final update before EOL.
Please upgrade to f17/f18 (jwb, 19:29:51)
Meeting ended at 19:31:14 UTC.
Action Items
------------
* jwb to discuss getting some testcases with adrianr
* jwb to try more copr builds for kernels this/next week
* jforbes to continue with incremental debug options in rawhide
Action Items, by person
-----------------------
* jwb
* jwb to discuss getting some testcases with adrianr
* jwb to try more copr builds for kernels this/next week
* jforbes
* jforbes to continue with incremental debug options in rawhide
* **UNASSIGNED**
* (none)
People Present (lines said)
---------------------------
* jwb (69)
* nirik (25)
* jforbes (18)
* davej (16)
* brunowolff (5)
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11 years, 2 months
Help figure out the debug slowness
by Justin Forbes
As mentioned in the FUDCon kernel talk, we are trying to figure out
exactly what causes the massive slowdown for some people with debug
kernels. At this point, debug is completely off in the rawhide kernel.
Every update this week will turn on more debug options until we find out
which one is causing the slowdown. For this to work, we need people
testing rawhide proper (not rawhide-nodebug). So please, if you can
update daily and give us feedback when you hit a wall, we would really
appreciate it. Feedback should be sent to kernel(a)lists.fedoraproject.org
Thanks,
Justin
11 years, 2 months
