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net: stats: Simplify periodic statistics printing

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Use modular arithmetic in statistics prints so that wraparounds are
automatically handled.

Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
This commit is contained in:
Jukka Rissanen 2018-07-18 12:59:33 +03:00 committed by Anas Nashif
parent af34779510
commit fbbef6f436
1 changed files with 11 additions and 14 deletions
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25
subsys/net/ip/net_stats.c
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@ -12,6 +12,7 @@
#include <kernel.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <net/net_core.h>
@ -54,16 +55,19 @@ static const char *priority2str(enum net_priority priority)
}
#endif
static inline s64_t cmp_val(u64_t val1, u64_t val2)
{
return (s64_t)(val1 - val2);
}
static inline void stats(struct net_if *iface)
{
static s64_t next_print;
s64_t curr = k_uptime_get();
static u64_t next_print;
u64_t curr = k_uptime_get();
s64_t cmp = cmp_val(curr, next_print);
int i;
if (!next_print || (next_print < curr &&
(!((curr - next_print) > PRINT_STATISTICS_INTERVAL)))) {
s64_t new_print;
if (!next_print || (abs(cmp) > PRINT_STATISTICS_INTERVAL)) {
if (iface) {
NET_INFO("Interface %p [%d]", iface,
net_if_get_by_iface(iface));
@ -217,14 +221,7 @@ static inline void stats(struct net_if *iface)
ARG_UNUSED(i);
#endif /* NET_TC_COUNT > 1 */
new_print = curr + PRINT_STATISTICS_INTERVAL;
if (new_print > curr) {
next_print = new_print;
} else {
/* Overflow */
next_print = PRINT_STATISTICS_INTERVAL -
(LLONG_MAX - curr);
}
next_print = curr + PRINT_STATISTICS_INTERVAL;
}
}