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curl/lib/progress.c
Olivier Brunel 4b86113f5e speed caps: not based on average speeds anymore 
Speed limits (from CURLOPT_MAX_RECV_SPEED_LARGE &
CURLOPT_MAX_SEND_SPEED_LARGE) were applied simply by comparing limits
with the cumulative average speed of the entire transfer; While this
might work at times with good/constant connections, in other cases it
can result to the limits simply being "ignored" for more than "short
bursts" (as told in man page).

Consider a download that goes on much slower than the limit for some
time (because bandwidth is used elsewhere, server is slow, whatever the
reason), then once things get better, curl would simply ignore the limit
up until the average speed (since the beginning of the transfer) reached
the limit.  This could prove the limit useless to effectively avoid
using the entire bandwidth (at least for quite some time).

So instead, we now use a "moving starting point" as reference, and every
time at least as much as the limit as been transferred, we can reset
this starting point to the current position. This gets a good limiting
effect that applies to the "current speed" with instant reactivity (in
case of sudden speed burst).

Closes #971
2016-09-04 13:11:23 +02:00

568 lines
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "curl_setup.h"
#include "urldata.h"
#include "sendf.h"
#include "progress.h"
#include "curl_printf.h"
/* Provide a string that is 2 + 1 + 2 + 1 + 2 = 8 letters long (plus the zero
byte) */
static void time2str(char *r, curl_off_t seconds)
{
curl_off_t d, h, m, s;
if(seconds <= 0) {
strcpy(r, "--:--:--");
return;
}
h = seconds / CURL_OFF_T_C(3600);
if(h <= CURL_OFF_T_C(99)) {
m = (seconds - (h*CURL_OFF_T_C(3600))) / CURL_OFF_T_C(60);
s = (seconds - (h*CURL_OFF_T_C(3600))) - (m*CURL_OFF_T_C(60));
snprintf(r, 9, "%2" CURL_FORMAT_CURL_OFF_T ":%02" CURL_FORMAT_CURL_OFF_T
":%02" CURL_FORMAT_CURL_OFF_T, h, m, s);
}
else {
/* this equals to more than 99 hours, switch to a more suitable output
format to fit within the limits. */
d = seconds / CURL_OFF_T_C(86400);
h = (seconds - (d*CURL_OFF_T_C(86400))) / CURL_OFF_T_C(3600);
if(d <= CURL_OFF_T_C(999))
snprintf(r, 9, "%3" CURL_FORMAT_CURL_OFF_T
"d %02" CURL_FORMAT_CURL_OFF_T "h", d, h);
else
snprintf(r, 9, "%7" CURL_FORMAT_CURL_OFF_T "d", d);
}
}
/* The point of this function would be to return a string of the input data,
but never longer than 5 columns (+ one zero byte).
Add suffix k, M, G when suitable... */
static char *max5data(curl_off_t bytes, char *max5)
{
#define ONE_KILOBYTE CURL_OFF_T_C(1024)
#define ONE_MEGABYTE (CURL_OFF_T_C(1024) * ONE_KILOBYTE)
#define ONE_GIGABYTE (CURL_OFF_T_C(1024) * ONE_MEGABYTE)
#define ONE_TERABYTE (CURL_OFF_T_C(1024) * ONE_GIGABYTE)
#define ONE_PETABYTE (CURL_OFF_T_C(1024) * ONE_TERABYTE)
if(bytes < CURL_OFF_T_C(100000))
snprintf(max5, 6, "%5" CURL_FORMAT_CURL_OFF_T, bytes);
else if(bytes < CURL_OFF_T_C(10000) * ONE_KILOBYTE)
snprintf(max5, 6, "%4" CURL_FORMAT_CURL_OFF_T "k", bytes/ONE_KILOBYTE);
else if(bytes < CURL_OFF_T_C(100) * ONE_MEGABYTE)
/* 'XX.XM' is good as long as we're less than 100 megs */
snprintf(max5, 6, "%2" CURL_FORMAT_CURL_OFF_T ".%0"
CURL_FORMAT_CURL_OFF_T "M", bytes/ONE_MEGABYTE,
(bytes%ONE_MEGABYTE) / (ONE_MEGABYTE/CURL_OFF_T_C(10)) );
#if (CURL_SIZEOF_CURL_OFF_T > 4)
else if(bytes < CURL_OFF_T_C(10000) * ONE_MEGABYTE)
/* 'XXXXM' is good until we're at 10000MB or above */
snprintf(max5, 6, "%4" CURL_FORMAT_CURL_OFF_T "M", bytes/ONE_MEGABYTE);
else if(bytes < CURL_OFF_T_C(100) * ONE_GIGABYTE)
/* 10000 MB - 100 GB, we show it as XX.XG */
snprintf(max5, 6, "%2" CURL_FORMAT_CURL_OFF_T ".%0"
CURL_FORMAT_CURL_OFF_T "G", bytes/ONE_GIGABYTE,
(bytes%ONE_GIGABYTE) / (ONE_GIGABYTE/CURL_OFF_T_C(10)) );
else if(bytes < CURL_OFF_T_C(10000) * ONE_GIGABYTE)
/* up to 10000GB, display without decimal: XXXXG */
snprintf(max5, 6, "%4" CURL_FORMAT_CURL_OFF_T "G", bytes/ONE_GIGABYTE);
else if(bytes < CURL_OFF_T_C(10000) * ONE_TERABYTE)
/* up to 10000TB, display without decimal: XXXXT */
snprintf(max5, 6, "%4" CURL_FORMAT_CURL_OFF_T "T", bytes/ONE_TERABYTE);
else
/* up to 10000PB, display without decimal: XXXXP */
snprintf(max5, 6, "%4" CURL_FORMAT_CURL_OFF_T "P", bytes/ONE_PETABYTE);
/* 16384 petabytes (16 exabytes) is the maximum a 64 bit unsigned number
can hold, but our data type is signed so 8192PB will be the maximum. */
#else
else
snprintf(max5, 6, "%4" CURL_FORMAT_CURL_OFF_T "M", bytes/ONE_MEGABYTE);
#endif
return max5;
}
/*
New proposed interface, 9th of February 2000:
pgrsStartNow() - sets start time
pgrsSetDownloadSize(x) - known expected download size
pgrsSetUploadSize(x) - known expected upload size
pgrsSetDownloadCounter() - amount of data currently downloaded
pgrsSetUploadCounter() - amount of data currently uploaded
pgrsUpdate() - show progress
pgrsDone() - transfer complete
*/
int Curl_pgrsDone(struct connectdata *conn)
{
int rc;
struct Curl_easy *data = conn->data;
data->progress.lastshow=0;
rc = Curl_pgrsUpdate(conn); /* the final (forced) update */
if(rc)
return rc;
if(!(data->progress.flags & PGRS_HIDE) &&
!data->progress.callback)
/* only output if we don't use a progress callback and we're not
* hidden */
fprintf(data->set.err, "\n");
data->progress.speeder_c = 0; /* reset the progress meter display */
return 0;
}
/* reset all times except redirect, and reset the known transfer sizes */
void Curl_pgrsResetTimesSizes(struct Curl_easy *data)
{
data->progress.t_nslookup = 0.0;
data->progress.t_connect = 0.0;
data->progress.t_pretransfer = 0.0;
data->progress.t_starttransfer = 0.0;
Curl_pgrsSetDownloadSize(data, -1);
Curl_pgrsSetUploadSize(data, -1);
}
void Curl_pgrsTime(struct Curl_easy *data, timerid timer)
{
struct timeval now = Curl_tvnow();
switch(timer) {
default:
case TIMER_NONE:
/* mistake filter */
break;
case TIMER_STARTOP:
/* This is set at the start of a transfer */
data->progress.t_startop = now;
break;
case TIMER_STARTSINGLE:
/* This is set at the start of each single fetch */
data->progress.t_startsingle = now;
break;
case TIMER_STARTACCEPT:
data->progress.t_acceptdata = Curl_tvnow();
break;
case TIMER_NAMELOOKUP:
data->progress.t_nslookup =
Curl_tvdiff_secs(now, data->progress.t_startsingle);
break;
case TIMER_CONNECT:
data->progress.t_connect =
Curl_tvdiff_secs(now, data->progress.t_startsingle);
break;
case TIMER_APPCONNECT:
data->progress.t_appconnect =
Curl_tvdiff_secs(now, data->progress.t_startsingle);
break;
case TIMER_PRETRANSFER:
data->progress.t_pretransfer =
Curl_tvdiff_secs(now, data->progress.t_startsingle);
break;
case TIMER_STARTTRANSFER:
data->progress.t_starttransfer =
Curl_tvdiff_secs(now, data->progress.t_startsingle);
break;
case TIMER_POSTRANSFER:
/* this is the normal end-of-transfer thing */
break;
case TIMER_REDIRECT:
data->progress.t_redirect = Curl_tvdiff_secs(now, data->progress.start);
break;
}
}
void Curl_pgrsStartNow(struct Curl_easy *data)
{
data->progress.speeder_c = 0; /* reset the progress meter display */
data->progress.start = Curl_tvnow();
data->progress.ul_limit_start.tv_sec = 0;
data->progress.ul_limit_start.tv_usec = 0;
data->progress.dl_limit_start.tv_sec = 0;
data->progress.dl_limit_start.tv_usec = 0;
/* clear all bits except HIDE and HEADERS_OUT */
data->progress.flags &= PGRS_HIDE|PGRS_HEADERS_OUT;
}
/*
* This is used to handle speed limits, calculating how much milliseconds we
* need to wait until we're back under the speed limit, if needed.
*
* The way it works is by having a "starting point" (time & amount of data
* transfered by then) used in the speed computation, to be used instead of the
* start of the transfer.
* This starting point is regularly moved as transfer goes on, to keep getting
* accurate values (instead of average over the entire tranfer).
*
* This function takes the current amount of data transfered, the amount at the
* starting point, the limit (in bytes/s), the time of the starting point and
* the current time.
*
* Returns -1 if no waiting is needed (not enough data transfered since
* starting point yet), 0 when no waiting is needed but the starting point
* should be reset (to current), or the number of milliseconds to wait to get
* back under the speed limit.
*/
long Curl_pgrsLimitWaitTime(curl_off_t cursize,
curl_off_t startsize,
curl_off_t limit,
struct timeval start,
struct timeval now)
{
curl_off_t size = cursize - startsize;
long minimum, actual;
/* we don't have a starting point yet -- return 0 so it gets (re)set */
if(start.tv_sec == 0 && start.tv_usec == 0)
return 0;
/* not enough data yet */
if(size < limit)
return -1;
minimum = (long) (CURL_OFF_T_C(1000) * size / limit);
actual = Curl_tvdiff(now, start);
if(actual < minimum)
return minimum - actual;
else
return 0;
}
void Curl_pgrsSetDownloadCounter(struct Curl_easy *data, curl_off_t size)
{
struct timeval now = Curl_tvnow();
data->progress.downloaded = size;
/* download speed limit */
if((data->set.max_recv_speed > 0) &&
(Curl_pgrsLimitWaitTime(data->progress.downloaded,
data->progress.dl_limit_size,
data->set.max_recv_speed,
data->progress.dl_limit_start,
now) == 0)) {
data->progress.dl_limit_start = now;
data->progress.dl_limit_size = size;
}
}
void Curl_pgrsSetUploadCounter(struct Curl_easy *data, curl_off_t size)
{
struct timeval now = Curl_tvnow();
data->progress.uploaded = size;
/* upload speed limit */
if((data->set.max_send_speed > 0) &&
(Curl_pgrsLimitWaitTime(data->progress.uploaded,
data->progress.ul_limit_size,
data->set.max_send_speed,
data->progress.ul_limit_start,
now) == 0)) {
data->progress.ul_limit_start = now;
data->progress.ul_limit_size = size;
}
}
void Curl_pgrsSetDownloadSize(struct Curl_easy *data, curl_off_t size)
{
if(size >= 0) {
data->progress.size_dl = size;
data->progress.flags |= PGRS_DL_SIZE_KNOWN;
}
else {
data->progress.size_dl = 0;
data->progress.flags &= ~PGRS_DL_SIZE_KNOWN;
}
}
void Curl_pgrsSetUploadSize(struct Curl_easy *data, curl_off_t size)
{
if(size >= 0) {
data->progress.size_ul = size;
data->progress.flags |= PGRS_UL_SIZE_KNOWN;
}
else {
data->progress.size_ul = 0;
data->progress.flags &= ~PGRS_UL_SIZE_KNOWN;
}
}
/*
* Curl_pgrsUpdate() returns 0 for success or the value returned by the
* progress callback!
*/
int Curl_pgrsUpdate(struct connectdata *conn)
{
struct timeval now;
int result;
char max5[6][10];
curl_off_t dlpercen=0;
curl_off_t ulpercen=0;
curl_off_t total_percen=0;
curl_off_t total_transfer;
curl_off_t total_expected_transfer;
curl_off_t timespent;
struct Curl_easy *data = conn->data;
int nowindex = data->progress.speeder_c% CURR_TIME;
int checkindex;
int countindex; /* amount of seconds stored in the speeder array */
char time_left[10];
char time_total[10];
char time_spent[10];
curl_off_t ulestimate=0;
curl_off_t dlestimate=0;
curl_off_t total_estimate;
bool shownow=FALSE;
now = Curl_tvnow(); /* what time is it */
/* The time spent so far (from the start) */
data->progress.timespent =
(double)(now.tv_sec - data->progress.start.tv_sec) +
(double)(now.tv_usec - data->progress.start.tv_usec)/1000000.0;
timespent = (curl_off_t)data->progress.timespent;
/* The average download speed this far */
data->progress.dlspeed = (curl_off_t)
((double)data->progress.downloaded/
(data->progress.timespent>0?data->progress.timespent:1));
/* The average upload speed this far */
data->progress.ulspeed = (curl_off_t)
((double)data->progress.uploaded/
(data->progress.timespent>0?data->progress.timespent:1));
/* Calculations done at most once a second, unless end is reached */
if(data->progress.lastshow != (long)now.tv_sec) {
shownow = TRUE;
data->progress.lastshow = now.tv_sec;
/* Let's do the "current speed" thing, which should use the fastest
of the dl/ul speeds. Store the faster speed at entry 'nowindex'. */
data->progress.speeder[ nowindex ] =
data->progress.downloaded>data->progress.uploaded?
data->progress.downloaded:data->progress.uploaded;
/* remember the exact time for this moment */
data->progress.speeder_time [ nowindex ] = now;
/* advance our speeder_c counter, which is increased every time we get
here and we expect it to never wrap as 2^32 is a lot of seconds! */
data->progress.speeder_c++;
/* figure out how many index entries of data we have stored in our speeder
array. With N_ENTRIES filled in, we have about N_ENTRIES-1 seconds of
transfer. Imagine, after one second we have filled in two entries,
after two seconds we've filled in three entries etc. */
countindex = ((data->progress.speeder_c>=CURR_TIME)?
CURR_TIME:data->progress.speeder_c) - 1;
/* first of all, we don't do this if there's no counted seconds yet */
if(countindex) {
long span_ms;
/* Get the index position to compare with the 'nowindex' position.
Get the oldest entry possible. While we have less than CURR_TIME
entries, the first entry will remain the oldest. */
checkindex = (data->progress.speeder_c>=CURR_TIME)?
data->progress.speeder_c%CURR_TIME:0;
/* Figure out the exact time for the time span */
span_ms = Curl_tvdiff(now,
data->progress.speeder_time[checkindex]);
if(0 == span_ms)
span_ms=1; /* at least one millisecond MUST have passed */
/* Calculate the average speed the last 'span_ms' milliseconds */
{
curl_off_t amount = data->progress.speeder[nowindex]-
data->progress.speeder[checkindex];
if(amount > CURL_OFF_T_C(4294967) /* 0xffffffff/1000 */)
/* the 'amount' value is bigger than would fit in 32 bits if
multiplied with 1000, so we use the double math for this */
data->progress.current_speed = (curl_off_t)
((double)amount/((double)span_ms/1000.0));
else
/* the 'amount' value is small enough to fit within 32 bits even
when multiplied with 1000 */
data->progress.current_speed = amount*CURL_OFF_T_C(1000)/span_ms;
}
}
else
/* the first second we use the main average */
data->progress.current_speed =
(data->progress.ulspeed>data->progress.dlspeed)?
data->progress.ulspeed:data->progress.dlspeed;
} /* Calculations end */
if(!(data->progress.flags & PGRS_HIDE)) {
/* progress meter has not been shut off */
if(data->set.fxferinfo) {
/* There's a callback set, call that */
result= data->set.fxferinfo(data->set.progress_client,
data->progress.size_dl,
data->progress.downloaded,
data->progress.size_ul,
data->progress.uploaded);
if(result)
failf(data, "Callback aborted");
return result;
}
else if(data->set.fprogress) {
/* The older deprecated callback is set, call that */
result= data->set.fprogress(data->set.progress_client,
(double)data->progress.size_dl,
(double)data->progress.downloaded,
(double)data->progress.size_ul,
(double)data->progress.uploaded);
if(result)
failf(data, "Callback aborted");
return result;
}
if(!shownow)
/* only show the internal progress meter once per second */
return 0;
/* If there's no external callback set, use internal code to show
progress */
if(!(data->progress.flags & PGRS_HEADERS_OUT)) {
if(data->state.resume_from) {
fprintf(data->set.err,
"** Resuming transfer from byte position %"
CURL_FORMAT_CURL_OFF_T "\n", data->state.resume_from);
}
fprintf(data->set.err,
" %% Total %% Received %% Xferd Average Speed "
"Time Time Time Current\n"
" Dload Upload "
"Total Spent Left Speed\n");
data->progress.flags |= PGRS_HEADERS_OUT; /* headers are shown */
}
/* Figure out the estimated time of arrival for the upload */
if((data->progress.flags & PGRS_UL_SIZE_KNOWN) &&
(data->progress.ulspeed > CURL_OFF_T_C(0))) {
ulestimate = data->progress.size_ul / data->progress.ulspeed;
if(data->progress.size_ul > CURL_OFF_T_C(10000))
ulpercen = data->progress.uploaded /
(data->progress.size_ul/CURL_OFF_T_C(100));
else if(data->progress.size_ul > CURL_OFF_T_C(0))
ulpercen = (data->progress.uploaded*100) /
data->progress.size_ul;
}
/* ... and the download */
if((data->progress.flags & PGRS_DL_SIZE_KNOWN) &&
(data->progress.dlspeed > CURL_OFF_T_C(0))) {
dlestimate = data->progress.size_dl / data->progress.dlspeed;
if(data->progress.size_dl > CURL_OFF_T_C(10000))
dlpercen = data->progress.downloaded /
(data->progress.size_dl/CURL_OFF_T_C(100));
else if(data->progress.size_dl > CURL_OFF_T_C(0))
dlpercen = (data->progress.downloaded*100) /
data->progress.size_dl;
}
/* Now figure out which of them is slower and use that one for the
total estimate! */
total_estimate = ulestimate>dlestimate?ulestimate:dlestimate;
/* create the three time strings */
time2str(time_left, total_estimate > 0?(total_estimate - timespent):0);
time2str(time_total, total_estimate);
time2str(time_spent, timespent);
/* Get the total amount of data expected to get transferred */
total_expected_transfer =
(data->progress.flags & PGRS_UL_SIZE_KNOWN?
data->progress.size_ul:data->progress.uploaded)+
(data->progress.flags & PGRS_DL_SIZE_KNOWN?
data->progress.size_dl:data->progress.downloaded);
/* We have transferred this much so far */
total_transfer = data->progress.downloaded + data->progress.uploaded;
/* Get the percentage of data transferred so far */
if(total_expected_transfer > CURL_OFF_T_C(10000))
total_percen = total_transfer /
(total_expected_transfer/CURL_OFF_T_C(100));
else if(total_expected_transfer > CURL_OFF_T_C(0))
total_percen = (total_transfer*100) / total_expected_transfer;
fprintf(data->set.err,
"\r"
"%3" CURL_FORMAT_CURL_OFF_T " %s "
"%3" CURL_FORMAT_CURL_OFF_T " %s "
"%3" CURL_FORMAT_CURL_OFF_T " %s %s %s %s %s %s %s",
total_percen, /* 3 letters */ /* total % */
max5data(total_expected_transfer, max5[2]), /* total size */
dlpercen, /* 3 letters */ /* rcvd % */
max5data(data->progress.downloaded, max5[0]), /* rcvd size */
ulpercen, /* 3 letters */ /* xfer % */
max5data(data->progress.uploaded, max5[1]), /* xfer size */
max5data(data->progress.dlspeed, max5[3]), /* avrg dl speed */
max5data(data->progress.ulspeed, max5[4]), /* avrg ul speed */
time_total, /* 8 letters */ /* total time */
time_spent, /* 8 letters */ /* time spent */
time_left, /* 8 letters */ /* time left */
max5data(data->progress.current_speed, max5[5]) /* current speed */
);
/* we flush the output stream to make it appear as soon as possible */
fflush(data->set.err);
} /* !(data->progress.flags & PGRS_HIDE) */
return 0;
}
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