diff options
| author | Florian Pritz <bluewind@xinu.at> | 2012-02-10 01:09:25 +0100 |
|---|---|---|
| committer | Florian Pritz <bluewind@xinu.at> | 2012-02-10 10:54:07 +0100 |
| commit | 6193fd07dd2c7dd368435f46df2d4a50143914e8 (patch) | |
| tree | 059364732ed6984e25501a1e0f3da7ea6cf677a1 | |
| parent | 7e5254be00755615369da454e28896af51ae9cb3 (diff) | |
fb-helper.c: calculate a moving average of the upload speed
Signed-off-by: Florian Pritz <bluewind@xinu.at>
| -rw-r--r-- | fb-helper.c | 37 |
1 files changed, 32 insertions, 5 deletions
diff --git a/fb-helper.c b/fb-helper.c index dcd085d..f8fe70e 100644 --- a/fb-helper.c +++ b/fb-helper.c @@ -27,13 +27,20 @@ #define FORMAT_ARRAY_SIZE 5 #define FORMAT_BYTES_BUFFER 64 #define FORMAT_TIME_BUFFER 32 +#define SAMPLE_COUNT 15 + +struct sample { + size_t size; + double time; +}; /* struct which holds the persistent data for progress_callback */ struct progressData { - struct timeval starttime; struct timeval last; double ullast; int lastStringLength; + struct sample samples[SAMPLE_COUNT]; + int current_sample; }; /* load the contents of file fn into data */ @@ -123,7 +130,10 @@ int progress_callback( char total[FORMAT_BYTES_BUFFER]; char eta[FORMAT_TIME_BUFFER]; time_t time_remaining = 0; + double ulspeed = 0.0; + size_t sample_total = 0; + double sample_time = 0.0; if (0 == ulnow) return 0; @@ -145,7 +155,24 @@ int progress_callback( if (timeSpent < 0.2 && timeSpent > -1.0) return 0; - ulspeed = (ulnow - data->ullast) / timeSpent; + /* save a sample every time we update and average over all samples + * to reduce jumpiness */ + data->samples[data->current_sample].size = ulnow - data->ullast; + data->samples[data->current_sample].time = timeSpent; + + data->current_sample++; + if (data->current_sample >= SAMPLE_COUNT) { + data->current_sample = 0; + } + + for (int i = 0; i < SAMPLE_COUNT; i++) { + if (data->samples[i].size != 0) { + sample_total += data->samples[i].size; + sample_time += data->samples[i].time; + } + } + + ulspeed = sample_total / sample_time; if (ulspeed < 1) { snprintf(eta, sizeof(eta), "stalling"); @@ -192,10 +219,10 @@ int main(int argc, char *argv[]) char *userAgent = "fb-client/"VERSION; struct progressData cb_data = { - .starttime = {.tv_sec = 0, .tv_usec = 0}, .last = {.tv_sec = 0, .tv_usec = 0}, .ullast = 0.0, - .lastStringLength = 0 + .lastStringLength = 0, + .current_sample = 0 }; char *mode = NULL; @@ -291,7 +318,7 @@ int main(int argc, char *argv[]) curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, (long)30); /* save time for progress calculation */ - gettimeofday(&cb_data.starttime, NULL); + gettimeofday(&cb_data.last, NULL); /* run the request */ res = curl_easy_perform(curl); |