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MINOR: stats: report the global output bit rate in human readable form

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The stats page now reports the per-process output bit rate and applies
the usual conversions needed to turn the TCP payload rate to an Ethernet
bit rate in order to give a reasonably accurate estimate of how far from
interface saturation we are.
This commit is contained in:
Willy Tarreau 2019-05-23 12:23:55 +02:00
parent 7cf0e4517d
commit 1713c03825
1 changed files with 15 additions and 1 deletions
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16
src/stats.c
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@ -2381,6 +2381,18 @@ static void stats_dump_html_info(struct stream_interface *si, struct uri_auth *u
unsigned int up = (now.tv_sec - start_date.tv_sec);
char scope_txt[STAT_SCOPE_TXT_MAXLEN + sizeof STAT_SCOPE_PATTERN];
const char *scope_ptr = stats_scope_ptr(appctx, si);
unsigned long long bps = (unsigned long long)read_freq_ctr(&global.out_32bps) * 32;
/* Turn the bytes per second to bits per second and take care of the
* usual ethernet overhead in order to help figure how far we are from
* interface saturation since it's the only case which usually matters.
* For this we count the total size of an Ethernet frame on the wire
* including preamble and IFG (1538) for the largest TCP segment it
* transports (1448 with TCP timestamps). This is not valid for smaller
* packets (under-estimated), but it gives a reasonably accurate
* estimation of how far we are from uplink saturation.
*/
bps = bps * 8 * 1538 / 1448;
/* WARNING! this has to fit the first packet too.
* We are around 3.5 kB, add adding entries will
@ -2397,7 +2409,7 @@ static void stats_dump_html_info(struct stream_interface *si, struct uri_auth *u
"<b>uptime = </b> %dd %dh%02dm%02ds<br>\n"
"<b>system limits:</b> memmax = %s%s; ulimit-n = %d<br>\n"
"<b>maxsock = </b> %d; <b>maxconn = </b> %d; <b>maxpipes = </b> %d<br>\n"
"current conns = %d; current pipes = %d/%d; conn rate = %d/sec<br>\n"
"current conns = %d; current pipes = %d/%d; conn rate = %d/sec; bit rate = %.3f %cbps<br>\n"
"Running tasks: %d/%d; idle = %d %%<br>\n"
"</td><td align=\"center\" nowrap>\n"
"<table class=\"lgd\"><tr>\n"
@ -2435,6 +2447,8 @@ static void stats_dump_html_info(struct stream_interface *si, struct uri_auth *u
global.rlimit_nofile,
global.maxsock, global.maxconn, global.maxpipes,
actconn, pipes_used, pipes_used+pipes_free, read_freq_ctr(&global.conn_per_sec),
bps >= 1000000000UL ? (bps / 1000000000.0) : bps >= 1000000UL ? (bps / 1000000.0) : (bps / 1000.0),
bps >= 1000000000UL ? 'G' : bps >= 1000000UL ? 'M' : 'k',
tasks_run_queue_cur, nb_tasks_cur, ti->idle_pct
);