Opened 14 years ago

Closed 14 years ago

#2485 closed bug (fixed)

CPU load too high when waiting for WMS server response.

Reported by: jekhor Owned by: mhugent
Priority: minor: annoyance Milestone: Version 1.5.0
Component: WMS Version: Trunk
Keywords: Cc:
Must Fix for Release: No Platform: Debian
Platform Version: Awaiting user input: no

Description

When QGIS is waithing for WMS server response, CPU is fully loaded. Strace shows that many poll()/read() syscalls are calling: 

poll([{fd=3, events=POLLIN}, {fd=7, events=POLLIN}, {fd=14, events=POLLIN}, {fd=10, events=POLLIN}], 4, 0) = 0 (Timeout)
clock_gettime(CLOCK_MONOTONIC, {116821, 811510129}) = 0
read(7, 0x94e5208, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
clock_gettime(CLOCK_MONOTONIC, {116821, 811564048}) = 0
read(7, 0x94e5208, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=3, events=POLLIN}, {fd=7, events=POLLIN}, {fd=14, events=POLLIN}, {fd=10, events=POLLIN}], 4, 0) = 0 (Timeout)
clock_gettime(CLOCK_MONOTONIC, {116821, 811649676}) = 0
read(7, 0x94e5208, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
clock_gettime(CLOCK_MONOTONIC, {116821, 820256260}) = 0
read(7, 0x94e5208, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=3, events=POLLIN}, {fd=7, events=POLLIN}, {fd=14, events=POLLIN}, {fd=10, events=POLLIN}], 4, 0) = 0 (Timeout)
clock_gettime(CLOCK_MONOTONIC, {116821, 820352853}) = 0
read(7, 0x94e5208, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
clock_gettime(CLOCK_MONOTONIC, {116821, 820408658}) = 0
read(7, 0x94e5208, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=3, events=POLLIN}, {fd=7, events=POLLIN}, {fd=14, events=POLLIN}, {fd=10, events=POLLIN}], 4, 0) = 0 (Timeout)
clock_gettime(CLOCK_MONOTONIC, {116821, 820495543}) = 0
read(7, 0x94e5208, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
clock_gettime(CLOCK_MONOTONIC, {116821, 820550370}) = 0
read(7, 0x94e5208, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=3, events=POLLIN}, {fd=7, events=POLLIN}, {fd=14, events=POLLIN}, {fd=10, events=POLLIN}], 4, 0) = 0 (Timeout)
clock_gettime(CLOCK_MONOTONIC, {116821, 820636557}) = 0
read(7, 0x94e5208, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
clock_gettime(CLOCK_MONOTONIC, {116821, 820690895}) = 0
read(7, 0x94e5208, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=3, events=POLLIN}, {fd=7, events=POLLIN}, {fd=14, events=POLLIN}, {fd=10, events=POLLIN}], 4, 0) = 0 (Timeout)
clock_gettime(CLOCK_MONOTONIC, {116821, 820776383}) = 0
read(7, 0x94e5208, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
clock_gettime(CLOCK_MONOTONIC, {116821, 820830861}) = 0
read(7, 0x94e5208, 4096)                = -1 EAGAIN (Resource temporarily unavailable)

Change History (2)

comment:1 by mhugent, 14 years ago

I think this is fixed with Juergens recent WMS changes. Could you try again with the current developer version?

comment:2 by jekhor, 14 years ago

Resolution: → fixed
Status: new → closed

Yes, this bug is fixed, thanks.

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