It appears to correlate well with embedded flash attempting to display.
strace shows:
[pid 5162] read(8, 0x68f804, 4096) = -1 EAGAIN (Resource temporarily
unavailable)
[pid 5162] poll([{fd=6, events=POLLIN}, {fd=8, events=POLLIN}, {fd=10,
events=POLLIN}, {fd=14, events=POLLIN|POLLPRI}, {fd=16, events=POLLIN|POLLPRI},
{fd=17, events=POLLIN|POLLPRI}, {fd=18, events=POLLIN|POLLPRI}, {fd=42,
events=POLLIN}, {fd=41, events=POLLIN}, {fd=36, events=POLLIN}, {fd=21,
events=POLLIN}], 11, 0) = 0
[pid 5162] read(8, 0x68f804, 4096) = -1 EAGAIN (Resource temporarily
unavailable)
[pid 5162] poll([{fd=6, events=POLLIN}, {fd=8, events=POLLIN}, {fd=10,
events=POLLIN}, {fd=14, events=POLLIN|POLLPRI}, {fd=16, events=POLLIN|POLLPRI},
{fd=17, events=POLLIN|POLLPRI}, {fd=18, events=POLLIN|POLLPRI}, {fd=42,
events=POLLIN}, {fd=41, events=POLLIN}, {fd=36, events=POLLIN}, {fd=21,
events=POLLIN}], 11, 0) = 0
--
Liferea uses a lot of CPU at times
https://bugs.launchpad.net/bugs/203157
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