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Message #35724
[Bug 1242229] Re: unity-panel-service uses 3% to 5% of one CPU core all the time
Thank you for taking the time to report this bug. We have tried to
recreate this on the latest release of Ubuntu and cannot reproduce it.
This bug is being marked as Invalid. If you believe the problem to
still exist in the latest version of Ubuntu please comment on why that
is the case and change the bug status to NEW.”
** Changed in: unity
Status: Confirmed => Invalid
** Changed in: unity (Ubuntu)
Status: Confirmed => Invalid
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https://bugs.launchpad.net/bugs/1242229
Title:
unity-panel-service uses 3% to 5% of one CPU core all the time
Status in Unity:
Invalid
Status in unity package in Ubuntu:
Invalid
Bug description:
unity-panel-service sits at between 3% and 5% of one core, all the
time. That's up to 50 MIPS! What's it doing?
Only standard indicators used, and most Unity lenses and scopes not
installed. Internet access is available and unfiltered. Standard Intel
Mobile 4 GPU.
When I set the datetime indicator to show seconds, unity-panel-service
uses an additional 1% of CPU. That's 10 million instructions each time
the clock ticks!
Sample strace output (most of it looks like this, repeated over and
over again, once per second):
futex(0x7fad2800f2b0, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x7fad2800eac0, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x7fad28004110, FUTEX_WAKE_PRIVATE, 1) = 1
recvfrom(3, 0x25896f4, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}, {fd=10, events=POLLIN}], 3, 481) = 1 ([{fd=4, revents=POLLIN}])
write(7, "\1\0\0\0\0\0\0\0", 8) = 8
futex(0x7fad2800f2b0, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x7fad2800eac0, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x7fad28004110, FUTEX_WAKE_PRIVATE, 1) = 1
recvfrom(3, 0x25896f4, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}, {fd=10, events=POLLIN}], 3, 478) = 1 ([{fd=4, revents=POLLIN}])
read(4, "\1\0\0\0\0\0\0\0", 16) = 8
recvfrom(3, 0x25896f4, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}, {fd=10, events=POLLIN}], 3, 478) = 0 (Timeout)
read(4, 0x7fff81ade700, 16) = -1 EAGAIN (Resource temporarily unavailable)
recvfrom(3, 0x25896f4, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}, {fd=10, events=POLLIN}], 3, 962) = 1 ([{fd=4, revents=POLLIN}])
recvfrom(3, 0x25896f4, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}, {fd=10, events=POLLIN}], 3, 80) = 1 ([{fd=4, revents=POLLIN}])
read(4, "\1\0\0\0\0\0\0\0", 16) = 8
recvfrom(3, 0x25896f4, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}, {fd=10, events=POLLIN}], 3, 80) = 0 (Timeout)
read(4, 0x7fff81ade700, 16) = -1 EAGAIN (Resource temporarily unavailable)
write(7, "\1\0\0\0\0\0\0\0", 8) = 8
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References