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nmeter: add %T (zero-based timestamp) format
function old new delta collect_tv - 132 +132 collect_monotonic - 61 +61 nmeter_main 754 778 +24 gmtime - 21 +21 init_monotonic - 18 +18 init_functions 44 48 +4 packed_usage 33432 33420 -12 collect_time 125 19 -106 ------------------------------------------------------------------------------ (add/remove: 5/0 grow/shrink: 2/2 up/down: 260/-118) Total: 142 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
parent
505eeae402
commit
4789c7cd81
@ -37,6 +37,7 @@
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//usage: "\n %[pn] # of processes"
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//usage: "\n %b Block io"
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//usage: "\n %Nt Time (with N decimal points)"
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//usage: "\n %NT Zero-based timestamp (with N decimal points)"
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//usage: "\n %r Print <cr> instead of <lf> at EOL"
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//TODO:
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@ -88,6 +89,7 @@ struct globals {
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int delta;
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unsigned deltanz;
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struct timeval tv;
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struct timeval start;
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#define first_proc_file proc_stat
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proc_file proc_stat; // Must match the order of proc_name's!
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proc_file proc_loadavg;
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@ -101,7 +103,6 @@ struct globals {
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#define is26 (G.is26 )
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#define need_seconds (G.need_seconds )
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#define cur_outbuf (G.cur_outbuf )
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#define tv (G.tv )
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#define proc_stat (G.proc_stat )
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#define proc_loadavg (G.proc_loadavg )
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#define proc_net_dev (G.proc_net_dev )
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@ -754,25 +755,53 @@ S_STAT(time_stat)
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unsigned scale;
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S_STAT_END(time_stat)
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static void FAST_FUNC collect_time(time_stat *s)
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static void FAST_FUNC collect_tv(time_stat *s, struct timeval *tv, int local)
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{
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char buf[sizeof("12:34:56.123456")];
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struct tm* tm;
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unsigned us = tv.tv_usec + s->scale/2;
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time_t t = tv.tv_sec;
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unsigned us = tv->tv_usec + s->scale/2;
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time_t t = tv->tv_sec;
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if (us >= 1000000) {
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t++;
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us -= 1000000;
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}
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tm = localtime(&t);
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if (local)
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tm = localtime(&t);
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else
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tm = gmtime(&t);
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sprintf(buf, "%02d:%02d:%02d", tm->tm_hour, tm->tm_min, tm->tm_sec);
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sprintf(buf, "%02u:%02u:%02u", tm->tm_hour, tm->tm_min, tm->tm_sec);
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if (s->prec)
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sprintf(buf+8, ".%0*d", s->prec, us / s->scale);
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sprintf(buf+8, ".%0*u", s->prec, us / s->scale);
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put(buf);
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}
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static void FAST_FUNC collect_time(time_stat *s)
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{
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collect_tv(s, &G.tv, /*local:*/ 1);
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}
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static void FAST_FUNC collect_monotonic(time_stat *s)
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{
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struct timeval tv_mono;
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tv_mono.tv_sec = G.tv.tv_sec - G.start.tv_sec;
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#if 0 /* Do we want this? */
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if (tv_mono.tv_sec < 0) {
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/* Time went backwards, reset start time to "now" */
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tv_mono.tv_sec = 0;
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G.start = G.tv;
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}
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#endif
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tv_mono.tv_usec = G.tv.tv_usec - G.start.tv_usec;
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if ((int32_t)tv_mono.tv_usec < 0) {
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tv_mono.tv_usec += 1000000;
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tv_mono.tv_sec--;
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}
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collect_tv(s, &tv_mono, /*local:*/ 0);
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}
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static s_stat* init_time(const char *param)
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{
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int prec;
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@ -789,6 +818,13 @@ static s_stat* init_time(const char *param)
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return (s_stat*)s;
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}
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static s_stat* init_monotonic(const char *param)
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{
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time_stat *s = (void*)init_time(param);
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s->collect = collect_monotonic;
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return (s_stat*)s;
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}
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static void FAST_FUNC collect_info(s_stat *s)
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{
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gen ^= 1;
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@ -801,7 +837,7 @@ static void FAST_FUNC collect_info(s_stat *s)
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typedef s_stat* init_func(const char *param);
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static const char options[] ALIGN1 = "ncmsfixptbr";
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static const char options[] ALIGN1 = "ncmsfixptTbr";
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static init_func *const init_functions[] = {
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init_if,
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init_cpu,
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@ -812,6 +848,7 @@ static init_func *const init_functions[] = {
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init_ctx,
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init_fork,
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init_time,
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init_monotonic,
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init_blk,
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init_cr
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};
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@ -913,13 +950,15 @@ int nmeter_main(int argc UNUSED_PARAM, char **argv)
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// Generate first samples but do not print them, they're bogus
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collect_info(first);
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reset_outbuf();
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if (G.delta >= 0) {
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gettimeofday(&tv, NULL);
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usleep(G.delta > 1000000 ? 1000000 : G.delta - tv.tv_usec % G.deltanz);
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gettimeofday(&G.tv, NULL);
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usleep(G.delta > 1000000 ? 1000000 : G.delta - G.tv.tv_usec % G.deltanz);
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}
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gettimeofday(&G.start, NULL);
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G.tv = G.start;
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while (1) {
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gettimeofday(&tv, NULL);
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collect_info(first);
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put_c(G.final_char);
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print_outbuf();
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@ -932,11 +971,11 @@ int nmeter_main(int argc UNUSED_PARAM, char **argv)
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if (G.delta >= 0) {
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int rem;
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// can be commented out, will sacrifice sleep time precision a bit
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gettimeofday(&tv, NULL);
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gettimeofday(&G.tv, NULL);
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if (need_seconds)
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rem = G.delta - ((ullong)tv.tv_sec*1000000 + tv.tv_usec) % G.deltanz;
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rem = G.delta - ((ullong)G.tv.tv_sec*1000000 + G.tv.tv_usec) % G.deltanz;
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else
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rem = G.delta - (unsigned)tv.tv_usec % G.deltanz;
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rem = G.delta - (unsigned)G.tv.tv_usec % G.deltanz;
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// Sometimes kernel wakes us up just a tiny bit earlier than asked
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// Do not go to very short sleep in this case
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if (rem < (unsigned)G.delta / 128) {
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@ -944,6 +983,7 @@ int nmeter_main(int argc UNUSED_PARAM, char **argv)
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}
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usleep(rem);
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}
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gettimeofday(&G.tv, NULL);
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}
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/*return 0;*/
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