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🎈 perf(clock_gettime): COARSE to reduce overhead

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yangwei
2024-08-01 03:00:27 +08:00
committed by luwenpeng
parent 2ff76d6598
commit a7837d6c93
3 changed files with 5 additions and 5 deletions
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2
src/packet/packet_craft.cpp
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@@ -37,7 +37,7 @@ static inline void calc_packet_fingerprint(struct fingerprint *finger)
{ {
#define RANGE(rand, start, end) (start + rand % (end - start + 1)) // [start, end] #define RANGE(rand, start, end) (start + rand % (end - start + 1)) // [start, end]
struct timespec time; struct timespec time;
clock_gettime(CLOCK_MONOTONIC, &time); clock_gettime(CLOCK_MONOTONIC_COARSE, &time);
uint64_t random = 0x013579ABCDEF ^ time.tv_nsec; uint64_t random = 0x013579ABCDEF ^ time.tv_nsec;
finger->ip_id = (uint16_t)(RANGE(random, 32767, 65535)); finger->ip_id = (uint16_t)(RANGE(random, 32767, 65535));
finger->ip_ttl = (uint8_t)(RANGE(random, 48, 120)); finger->ip_ttl = (uint8_t)(RANGE(random, 48, 120));

2
src/packet_io/marsio_io.cpp
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@@ -297,7 +297,7 @@ int marsio_io_ingress(struct marsio_io *handle, uint16_t thr_idx, struct packet
} }
pkt = &pkts[nr_parsed]; pkt = &pkts[nr_parsed];
memset(pkt, 0, sizeof(struct packet)); //memset(pkt, 0, sizeof(struct packet));
packet_parse(pkt, data, len); packet_parse(pkt, data, len);
metadata_from_mbuff_to_packet(mbuff, pkt); metadata_from_mbuff_to_packet(mbuff, pkt);
nr_parsed++; nr_parsed++;

6
src/times/times.cpp
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@@ -34,7 +34,7 @@
uint64_t stellar_get_monotonic_time_sec() uint64_t stellar_get_monotonic_time_sec()
{ {
struct timespec now; struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now); clock_gettime(CLOCK_MONOTONIC_COARSE, &now);
return TIMESPEC_TO_SEC(now); return TIMESPEC_TO_SEC(now);
} }
@@ -42,7 +42,7 @@ uint64_t stellar_get_monotonic_time_sec()
uint64_t stellar_get_monotonic_time_msec() uint64_t stellar_get_monotonic_time_msec()
{ {
struct timespec now; struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now); clock_gettime(CLOCK_MONOTONIC_COARSE, &now);
return TIMESPEC_TO_MSEC(now); return TIMESPEC_TO_MSEC(now);
} }
@@ -50,7 +50,7 @@ uint64_t stellar_get_monotonic_time_msec()
uint64_t stellar_get_real_time_sec() uint64_t stellar_get_real_time_sec()
{ {
struct timespec now; struct timespec now;
clock_gettime(CLOCK_REALTIME, &now); clock_gettime(CLOCK_REALTIME_COARSE, &now);
return TIMESPEC_TO_SEC(now); return TIMESPEC_TO_SEC(now);
} }