"Linos" <[email protected]> wrote:
https://sourceforge.net/p/curl/bugs/1238/
You are welcome, thank you for create the bug report.
I also see this. Here is the stack of the main thread:
ntkrnlpa.exe!KiUnexpectedInterrupt+0x121
ntkrnlpa.exe!ZwYieldExecution+0x1c90
hal.dll!HalClearSoftwareInterrupt+0x342
python27.dll!PyEval_EvalFrameEx+0xd9f
python27.dll!PyEval_EvalCodeEx+0x6b5
python27.dll!PyEval_EvalCodeEx+0x695
python27.dll!PyFunction_SetClosure+0x86a
python27.dll!PyObject_Call+0x4c
python27.dll!PyEval_CallObjectWithKeywords+0x89
pycurl.pyd+0x284c
libcurl.dll!Curl_pgrsUpdate+0x2e4 <<< !!! this is causing python to suck 25% CPU
libcurl.dll!multi_runsingle+0xc6d
libcurl.dll!curl_multi_perform+0x7c
libcurl.dll!curl_easy_perform+0xd1
pycurl.pyd+0x2279
python27.dll!PyEval_GetGlobals+0x68b
--------
I would expect a Python-script to run longer because of the limit on
recv-rate. But not that it should longer because the CPU gets overloaded
by Curl_pgrsUpdate().
BTW. I used the attached script to play with. In some cases with a rate_limit
of approx. 1000 bytes/sec, I also got a
pycurl.error: (56, 'Recv failure: Connection was reset')
Presumably because the server lost patience with such a slow client...
Win-XP SP3, pycurl + libcurl using MSVC v16.
--gv
#! /usr/bin/env python
import sys, pycurl
num_progress_callbacks = 0
dl_last = 0
def curl_progress (dl_total, dl_now, ul_total, ul_now):
global num_progress_callbacks, dl_last
if dl_now > 0.0 and dl_now > dl_last:
# print ('curl_progress. dl_now %15.0f bytes' % dl_now)
dl_last = dl_now
num_progress_callbacks += 1
return 0
def dev_null (buf):
pass
def test (url, rate_limit = 0):
if rate_limit > 0:
print ('rate_limit %d bytes/sec' % rate_limit)
else:
print ('No speed limit')
curl = pycurl.Curl()
curl.setopt (curl.URL, url)
curl.setopt (curl.MAX_RECV_SPEED_LARGE, rate_limit)
curl.setopt (curl.WRITEFUNCTION, dev_null)
curl.setopt (curl.NOPROGRESS, 0)
curl.setopt (curl.PROGRESSFUNCTION, curl_progress)
curl.setopt (curl.FOLLOWLOCATION, 1)
curl.perform()
curl.close()
rate_limit = 0
if len(sys.argv) > 1:
rate_limit = int(sys.argv[1])
test ('http://www.vg.no', rate_limit)
print ('num_progress_callbacks %d' % num_progress_callbacks)
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