Bug report #2485

CPU load too high when waiting for WMS server response.

Added by jekhor - over 10 years ago. Updated over 10 years ago.

Status:Closed
Priority:Low
Assignee:Marco Hugentobler
Category:Web Services clients/WMS
Affected QGIS version: Regression?:No
Operating System:Debian Easy fix?:No
Pull Request or Patch supplied: Resolution:fixed
Crashes QGIS or corrupts data: Copied to github as #:12545

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)

History

#1 Updated by Marco Hugentobler over 10 years ago

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

#2 Updated by jekhor - over 10 years ago

  • Resolution set to fixed
  • Status changed from Open to Closed

Yes, this bug is fixed, thanks.

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