Closed Bug 153772 Opened 23 years ago Closed 23 years ago

100% cpu use occuring frequently with pipelining enabled

Categories

(SeaMonkey :: General, defect)

Product:
SeaMonkey
Component:
General
Platform:
x86
All
Type:
defect
Priority:
Not set
Severity:
major

Tracking

(Not tracked)

Status:
VERIFIED DUPLICATE of bug 146884

People

(Reporter: jmd, Assigned: Matti)

References

Details

(Keywords: perf, qawanted, regression)

Attachments

(1 file)

strace output on pid 1348
117.77 KB, application/x-gzip
Details
After using the browser component of mozilla for a while, seemingly randomly, mozilla starts sucking 100% CPU. Here's relevent ps output: USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND mozilla 1336 0.0 0.5 2044 720 pts/3 S 13:09 0:00 run-mozilla.sh mozilla 1347 0.0 27.5 60276 34832 pts/3 S 13:09 0:00 mozilla-bin mozilla 1349 0.0 27.5 60276 34832 pts/3 S 13:09 0:00 mozilla-bin mozilla 1351 0.0 27.5 60276 34832 pts/3 S 13:09 0:01 mozilla-bin mozilla 1359 0.0 27.5 60276 34832 pts/3 S 13:11 0:00 mozilla-bin mozilla 1407 0.0 8.7 217996 11028 pts/3 S 13:47 0:05 java_vm mozilla 1409 0.0 8.7 217996 11028 pts/3 S 13:47 0:00 java_vm mozilla 1410 0.0 8.7 217996 11028 pts/3 S 13:47 0:00 java_vm mozilla 1411 0.0 8.7 217996 11028 pts/3 S 13:47 0:00 java_vm mozilla 1412 0.0 8.7 217996 11028 pts/3 S 13:47 0:00 java_vm mozilla 1413 0.0 8.7 217996 11028 pts/3 S 13:47 0:00 java_vm mozilla 1414 0.0 8.7 217996 11028 pts/3 S 13:47 0:00 java_vm mozilla 1415 0.0 8.7 217996 11028 pts/3 S 13:47 0:00 java_vm mozilla 1416 0.0 8.7 217996 11028 pts/3 S 13:47 0:01 java_vm mozilla 1418 0.0 8.7 217996 11028 pts/3 S 13:47 0:00 java_vm mozilla 1420 0.0 8.7 217996 11028 pts/3 S 13:47 0:00 java_vm mozilla 1423 0.0 8.7 217996 11028 pts/3 S 13:47 0:00 java_vm mozilla 1424 0.0 8.7 217996 11028 pts/3 S 13:47 0:00 java_vm mozilla 1425 0.0 27.5 60276 34832 pts/3 S 13:47 0:00 mozilla-bin mozilla 1427 0.0 8.7 217996 11028 pts/3 S 13:47 0:00 java_vm mozilla 1428 0.0 8.7 217996 11028 pts/3 S 13:47 0:00 java_vm mozilla 1429 0.0 8.7 217996 11028 pts/3 S 13:47 0:00 java_vm mozilla 1426 0.0 27.5 60276 34832 pts/3 T 13:47 0:00 mozilla-bin mozilla 1345 3.5 27.5 60276 34832 pts/3 S 13:09 7:16 mozilla-bin mozilla 1348 81.4 27.5 60276 34832 pts/3 R 13:09 164:39 mozilla-bin mozilla 3357 0.0 8.7 217996 11028 pts/3 S 16:31 0:00 java_vm mozilla 3358 0.0 8.7 217996 11028 pts/3 S 16:31 0:00 java_vm As you can see, one pid of mozilla, 1348, has used 164 minutes of CPU time. No tabs are open with running javascript, or animated gifs. I can go sit with one window and tab open at about:blank, cpu use remains. I'll attach a strace of that pid. Seems to be waiting for something... constant gettimeofday()'s, with a poll() on fd 7. This is happened to me every day for a while now. Only cure to drop CPU back down is restarting mozilla.
27150 gettimeofday's in 5.16 seconds.
Mozilla zombified on exit that run: mozilla 1336 0.0 0.5 2044 720 pts/3 S 13:09 0:00 run-mozilla.sh mozilla 1347 0.0 28.0 49304 35368 pts/3 S 13:09 0:00 mozilla-bin mozilla 1407 0.0 8.6 217996 10936 pts/3 S 13:47 0:05 java_vm mozilla 1409 0.0 8.6 217996 10936 pts/3 S 13:47 0:00 java_vm mozilla 1410 0.0 8.6 217996 10936 pts/3 S 13:47 0:00 java_vm mozilla 1411 0.0 8.6 217996 10936 pts/3 S 13:47 0:00 java_vm mozilla 1412 0.0 8.6 217996 10936 pts/3 S 13:47 0:00 java_vm mozilla 1413 0.0 8.6 217996 10936 pts/3 S 13:47 0:00 java_vm mozilla 1414 0.0 8.6 217996 10936 pts/3 S 13:47 0:00 java_vm mozilla 1415 0.0 8.6 217996 10936 pts/3 S 13:47 0:00 java_vm mozilla 1416 0.0 8.6 217996 10936 pts/3 S 13:47 0:01 java_vm mozilla 1418 0.0 8.6 217996 10936 pts/3 S 13:47 0:00 java_vm mozilla 1420 0.0 8.6 217996 10936 pts/3 S 13:47 0:00 java_vm mozilla 1423 0.0 8.6 217996 10936 pts/3 S 13:47 0:00 java_vm mozilla 1424 0.0 8.6 217996 10936 pts/3 S 13:47 0:00 java_vm mozilla 1425 0.0 0.0 0 0 pts/3 Z 13:47 0:00 mozilla-bin <defunct> mozilla 1427 0.0 8.6 217996 10936 pts/3 S 13:47 0:00 java_vm mozilla 1428 0.0 8.6 217996 10936 pts/3 S 13:47 0:00 java_vm mozilla 1429 0.0 8.6 217996 10936 pts/3 S 13:47 0:00 java_vm mozilla 1426 0.0 28.0 49304 35368 pts/3 T 13:47 0:00 mozilla-bin mozilla 3753 0.0 8.6 217996 10936 pts/3 S 17:19 0:00 java_vm mozilla 3754 0.0 8.6 217996 10936 pts/3 S 17:19 0:00 java_vm mozilla 1345 3.4 28.0 49304 35368 pts/3 S 13:09 8:45 mozilla-bin 1345 still using 3.4% cpu but strace on it showed nothing happening.
Keywords: qawanted
ps is probably giving you a cumulative CPU usage... if there is a plugin or something (I notice all the java_vm, although they're in separate threads, so I don't think they should affect mozilla-bin's numbers) on a page you have loaded, it might easily take 100% of the CPU. If it was there 80% of the time, you will get ps showing 80% CPU. What do you get from top? That should give you real-time usage numbers. 27150 gettimeofday's in 5.16 seconds does seem like a lot...
No, no plugins were running. Top shows 100% CPU use, like I said. The other 20% is system use, attending to mozilla.
PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME COMMAND 2150 mozilla 14 0 45576 39M 32364 R 97.0 32.3 31:49 mozilla-bin java was already running this time too, but I hadn't had an applet running for hours before the spontaneous 100% started happening. I'll disable java completely and see if this happens tomarrow.
Lately (within the past week or so) I've been noticing that mozilla would go to 100% CPU during normal usage too. I can't seem to quite place exactly what is triggering it. I'll often have a browser window with 10 or so tabs open, MailNews, and Chatzilla. I can close up the Browser windows and MailNews, so just chatzilla is open and it will still be using all available CPU time. Closing up the last remaining component will allow mozilla to terminate normally and CPU usage goes back to normal. Note: Mozilla and my pc (win2k) are still usable during this time. Mozilla just acts a bit lagged.
I've been seeing this for several weeks, also. It just happened to me after maybe 15 minutes of use (which is typical). I don't have any plugins or java loaded; it all seems like regular pages in three windows. As others have said, once it happens, the only way to stop it is exiting; it seems to be a lot of repeated poll and gettimeofday calls. I'm using a RedHat rawhide version at the moment (Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.1) Gecko/20020625), but I've been seeing it with nightlies, too. It doesn't seem to happen with 1.1alpha. It's pretty frustrating!
Seeing exactly the same as in comment #6 - using win-xp pro.
Severity: normal → major
Keywords: perf, regression
As mentioned in #mozillazine, maybe some relation to bug 146884? Reporter: Do you have pipelining enabled? (I do and I experience this bug, fwiw)
Happens to me a lot lately on W2K using nightlies. Now testing 2002070310. I have also noticed that Moz lately consumes 100% for about 3 seconds on exit and when closing the last open window while using QuickLaunch. Is this related to this bug?
Yes, pipelining and keepalive are enabled. Haven't seen this since I disabled Java though.
I am also seeing this on WinXP, 2002070508. The browser starts to use 100% cpu after browsing for a while. Browsing is still completely functional and there is no hang. I turned pipelining off and that has stopped it happening.
Pipelining seems to be the common thread here. My comment #6 should include that I too had pipelining enabled.
OS: Linux → All
Summary: 100% cpu use occuring frequently → 100% cpu use occuring frequently with pipelining enabled
confirming. I have Pipelining enabled as well
Isn't pipelining enabled by default? Seems an odd choice for the cause of this. Just to clarify my situtation at least, I was seeing this usually every day after say 4-8 hours of browser use. 10 days ago I disabled Java and haven't seen it once since. I haven't done quite as much surfing this week, but certainly 4-8 hours total. I'll post again ASAP if it should happen again with Java still off.
I turned off HTTP pipelining yesterday and haven't had this problem since then. It used to happen about once every 10 minutes.
*** This bug has been marked as a duplicate of 146884 ***
Status: NEW → RESOLVED
Closed: 23 years ago
Resolution: --- → DUPLICATE
OK, I'll verify. Finally happened to me with Java still off. Held down ^R for a while and boom.
Status: RESOLVED → VERIFIED
*** Bug 156340 has been marked as a duplicate of this bug. ***
Breaking the circular duplicates -> reopening.
Status: VERIFIED → REOPENED
Resolution: DUPLICATE → ---
I don't see any circular duplicates... *** This bug has been marked as a duplicate of 146884 ***
Status: REOPENED → RESOLVED
Closed: 23 years ago → 23 years ago
Resolution: --- → DUPLICATE
v
Status: RESOLVED → VERIFIED
Noticed the same problem. . .friend was running a webcam that uses java and the problem seemed to go away when he switched to using javascript. Had/have pipelining enabled. I'm a fairly repetative user; I do pretty much the same things to my Mozilla every day, in usually the same order. I will report back if I have the problem again (he switched to Javascript about a week+ ago).
Product: Browser → Seamonkey
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