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rate-limit: use three second window to better handle high speeds

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Due to very frequent updates of the rate limit "window", it could
attempt to rate limit within the same milliseconds and that then made
the calculations wrong, leading to it not behaving correctly on very
fast transfers.

This new logic updates the rate limit "window" to be no shorter than the
last three seconds and only updating the timestamps for this when
switching between the states TOOFAST/PERFORM.

Reported-by: 刘佩东
Fixes #2386
Closes #2388
This commit is contained in:
Daniel Stenberg 2018-03-15 16:43:00 +01:00
parent 236402fc2d
commit f5700ea88b
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GPG key ID: 5CC908FDB71E12C2
3 changed files with 61 additions and 43 deletions
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lib/progress.h
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@ -46,6 +46,7 @@ void Curl_pgrsSetDownloadSize(struct Curl_easy *data, curl_off_t size);
void Curl_pgrsSetUploadSize(struct Curl_easy *data, curl_off_t size);
void Curl_pgrsSetDownloadCounter(struct Curl_easy *data, curl_off_t size);
void Curl_pgrsSetUploadCounter(struct Curl_easy *data, curl_off_t size);
void Curl_ratelimit(struct Curl_easy *data, struct curltime now);
int Curl_pgrsUpdate(struct connectdata *);
void Curl_pgrsResetTransferSizes(struct Curl_easy *data);
void Curl_pgrsTime(struct Curl_easy *data, timerid timer);