Re: [CentOS] what is: ImageDecoder
From: Fred Smith fre...@fcshome.stoneham.ma.us
On Tue, Feb 04, 2014 at 07:43:27AM -0800, John Doe wrote:
Maybe webkit's ImageDecoder function...
Firefox uses WebKit
Ok, maybe I need some vacations...
Last try, from the source mozilla-release/image/src/RasterImage.cpp:
RasterImage::DecodePool::DecodePool()
: mThreadPoolMutex(Thread Pool)
{
if (gMultithreadedDecoding) {
mThreadPool = do_CreateInstance(NS_THREADPOOL_CONTRACTID);
if (mThreadPool) {
mThreadPool-SetName(NS_LITERAL_CSTRING(ImageDecoder));
uint32_t limit;
if (gDecodingThreadLimit = 0) {
limit = std::max(PR_GetNumberOfProcessors(), 2) - 1;
} else {
limit = static_castuint32_t(gDecodingThreadLimit);
}
mThreadPool-SetThreadLimit(limit);
mThreadPool-SetIdleThreadLimit(limit);
nsCOMPtrnsIObserverService obsSvc =
mozilla::services::GetObserverService();
if (obsSvc) {
obsSvc-AddObserver(this, xpcom-shutdown-threads, false);
}
}
}
}
JD
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Re: [CentOS] what is: ImageDecoder
From: Fred Smith fre...@fcshome.stoneham.ma.us I'm suddenly noticing multiple threads named ImageDecoder showing up in the output of top (when threads are turned on with H). I've no clue what this is, and haven't found out much about it by searching. Can someone tell me what it is, and if it's doing anything useful or just wasting cycles? From which process...? java? JD ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] what is: ImageDecoder
On Tue, Feb 04, 2014 at 02:26:32AM -0800, John Doe wrote: From: Fred Smith fre...@fcshome.stoneham.ma.us I'm suddenly noticing multiple threads named ImageDecoder showing up in the output of top (when threads are turned on with H). I've no clue what this is, and haven't found out much about it by searching. Can someone tell me what it is, and if it's doing anything useful or just wasting cycles? From which process...? java? Um, it appears in the process list as ImageDecoder. I don't know how one would determine that it's java or not. Can you give me a hint? -- Fred Smith -- fre...@fcshome.stoneham.ma.us - For the word of God is living and active. Sharper than any double-edged sword, it penetrates even to dividing soul and spirit, joints and marrow; it judges the thoughts and attitudes of the heart. Hebrews 4:12 (niv) -- ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] what is: ImageDecoder
Fred Smith fre...@fcshome.stoneham.ma.us a écrit : Um, it appears in the process list as ImageDecoder. I don't know how one would determine that it's java or not. Can you give me a hint? Try pstree ? HTH, Laurent. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] what is: ImageDecoder
Fred Smith wrote: On Tue, Feb 04, 2014 at 02:26:32AM -0800, John Doe wrote: From: Fred Smith fre...@fcshome.stoneham.ma.us I'm suddenly noticing multiple threads named ImageDecoder showing up in the output of top (when threads are turned on with H). I've no clue what this is, and haven't found out much about it by searching. Can someone tell me what it is, and if it's doing anything useful or just wasting cycles? From which process...? java? Um, it appears in the process list as ImageDecoder. I don't know how one would determine that it's java or not. Can you give me a hint? So ImageDecoder is a running process? Then I'd think that locate ImageDecoder would find it, so that you can check. mark ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] what is: ImageDecoder
On Tue, Feb 04, 2014 at 02:31:51PM +, Laurent Wandrebeck wrote: Fred Smith fre...@fcshome.stoneham.ma.us a écrit : Um, it appears in the process list as ImageDecoder. I don't know how one would determine that it's java or not. Can you give me a hint? Try pstree ? pstree shows nothing by that name. here's some output from top (with ppid and thread id added): 23040 fredex20 0 2424m 1.2g 41m S 0.3 16.3 1:13.71 1 fredex ImageDecoder #1 23123 fredex20 0 2424m 1.2g 41m S 0.3 16.3 1:12.82 1 fredex ImageDecoder #2 23189 fredex20 0 2424m 1.2g 41m S 0.3 16.3 1:13.47 1 fredex ImageDecoder #3 23190 fredex20 0 2424m 1.2g 41m S 0.3 16.3 1:12.73 1 fredex ImageDecoder #4 23191 fredex20 0 2424m 1.2g 41m S 0.3 16.3 1:14.02 1 fredex ImageDecoder #5 it appears to be a child of init, since PPID is 1 (the column just to the left of fredex.) given that ImageDecoder #1 is process 23040, doing ps -eLf | grep 23040 reveals: fredex 23011 1 23040 0 40 Feb03 ?00:01:13 /home/fredex/myfiles/programs/firefox-19/firefox/firefox It appears to be some kind of firefox alias, though I don't understand that relationship... further: $ ps -eLf | grep firefox fredex1152 1001 1152 01 09:47 pts/300:00:00 grep firefox fredex 23011 1 23011 7 40 Feb03 ?00:59:47 /home/fredex/myfiles/programs/firefox-19/firefox/firefox fredex 23011 1 23014 0 40 Feb03 ?00:00:10 /home/fredex/myfiles/programs/firefox-19/firefox/firefox fredex 23011 1 23015 0 40 Feb03 ?00:00:34 /home/fredex/myfiles/programs/firefox-19/firefox/firefox fredex 23011 1 23016 0 40 Feb03 ?00:03:06 /home/fredex/myfiles/programs/firefox-19/firefox/firefox fredex 23011 1 23017 0 40 Feb03 ?00:00:00 /home/fredex/myfiles/programs/firefox-19/firefox/firefox fredex 23011 1 23018 0 40 Feb03 ?00:00:00 /home/fredex/myfiles/programs/firefox-19/firefox/firefox fredex 23011 1 23019 0 40 Feb03 ?00:00:01 /home/fredex/myfiles/programs/firefox-19/firefox/firefox fredex 23011 1 23020 0 40 Feb03 ?00:00:01 /home/fredex/myfiles/programs/firefox-19/firefox/firefox fredex 23011 1 23021 0 40 Feb03 ?00:00:01 /home/fredex/myfiles/programs/firefox-19/firefox/firefox fredex 23011 1 23022 0 40 Feb03 ?00:00:01 /home/fredex/myfiles/programs/firefox-19/firefox/firefox fredex 23011 1 23023 0 40 Feb03 ?00:00:01 /home/fredex/myfiles/programs/firefox-19/firefox/firefox fredex 23011 1 23024 0 40 Feb03 ?00:00:01 /home/fredex/myfiles/programs/firefox-19/firefox/firefox fredex 23011 1 23025 0 40 Feb03 ?00:00:23 /home/fredex/myfiles/programs/firefox-19/firefox/firefox fredex 23011 1 23027 0 40 Feb03 ?00:00:00 /home/fredex/myfiles/programs/firefox-19/firefox/firefox fredex 23011 1 23028 0 40 Feb03 ?00:00:00 /home/fredex/myfiles/programs/firefox-19/firefox/firefox fredex 23011 1 23029 0 40 Feb03 ?00:00:00 /home/fredex/myfiles/programs/firefox-19/firefox/firefox fredex 23011 1 23030 0 40 Feb03 ?00:00:00 /home/fredex/myfiles/programs/firefox-19/firefox/firefox fredex 23011 1 23033 0 40 Feb03 ?00:00:23 /home/fredex/myfiles/programs/firefox-19/firefox/firefox fredex 23011 1 23035 0 40 Feb03 ?00:00:00 /home/fredex/myfiles/programs/firefox-19/firefox/firefox fredex 23011 1 23036 0 40 Feb03 ?00:00:00 /home/fredex/myfiles/programs/firefox-19/firefox/firefox fredex 23011 1 23040 0 40 Feb03 ?00:01:14 /home/fredex/myfiles/programs/firefox-19/firefox/firefox fredex 23011 1 23054 0 40 Feb03 ?00:00:00 /home/fredex/myfiles/programs/firefox-19/firefox/firefox where the 2nd column is the PID, the 3rd is the PPID and the 4th is LWP, which I take to also be the same as thread ID. so, Firefox has spawned a ton of child threads, and some of them appear in top as Image Decoder #x. I dunno WHY they have a strange name, but at least I now know where they came from. I find it somewhat odd that I've never seen them before (I just upgraded to a new motherboard and 6-core CPU, from previously having had a 2-core CPU) and suddenly I see them in top. I've spent a fair amount of time, over the years, staring at top output, but don't recall ever seeing those there before. And yes, it's the same centos installation, I just put a new MB into the system and fired it up. So, I guess this is solved as far as I feel like taking it. Thanks to all (both) of you who offered advice. Fred -- Fred Smith -- fre...@fcshome.stoneham.ma.us - But God demonstrates his own love
Re: [CentOS] what is: ImageDecoder
Fred Smith wrote: On Tue, Feb 04, 2014 at 02:31:51PM +, Laurent Wandrebeck wrote: Fred Smith fre...@fcshome.stoneham.ma.us a écrit : Um, it appears in the process list as ImageDecoder. I don't know how one would determine that it's java or not. snip here's some output from top (with ppid and thread id added): 23040 fredex20 0 2424m 1.2g 41m S 0.3 16.3 1:13.71 1 fredex ImageDecoder #1 23123 fredex20 0 2424m 1.2g 41m S 0.3 16.3 1:12.82 1 fredex ImageDecoder #2 snip it appears to be a child of init, since PPID is 1 (the column just to the left of fredex.) Suggests that they crashed, or logged out, and this remained running. given that ImageDecoder #1 is process 23040, doing ps -eLf | grep 23040 reveals: fredex 23011 1 23040 0 40 Feb03 ?00:01:13 /home/fredex/myfiles/programs/firefox-19/firefox/firefox It appears to be some kind of firefox alias, though I don't understand that relationship... snip so, Firefox has spawned a ton of child threads, and some of them appear in top as Image Decoder #x. I dunno WHY they have a strange name, but at least I now know where they came from. snip So, I guess this is solved as far as I feel like taking it. Thanks to all (both) of you who offered advice. One more thing before you drop it - it is, in fact, a firefox thing, and based on the name, either java or perl https://bugzilla.mozilla.org/show_bug.cgi?id=860149 (after googling firefox imagedecoder). mark ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] what is: ImageDecoder
From: Fred Smith fre...@fcshome.stoneham.ma.us so, Firefox has spawned a ton of child threads, and some of them appear in top as Image Decoder #x. I dunno WHY they have a strange name, but at least I now know where they came from. Maybe webkit's ImageDecoder function... JD ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] what is: ImageDecoder
On Tue, Feb 04, 2014 at 07:43:27AM -0800, John Doe wrote: From: Fred Smith fre...@fcshome.stoneham.ma.us so, Firefox has spawned a ton of child threads, and some of them appear in top as Image Decoder #x. I dunno WHY they have a strange name, but at least I now know where they came from. Maybe webkit's ImageDecoder function... Firefox uses WebKit -- Fred Smith -- fre...@fcshome.stoneham.ma.us - God made him who had no sin to be sin for us, so that in him we might become the righteousness of God. --- Corinthians 5:21 - ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
