DWS/chrony
1
0
Fork 0
mirror of https://gitlab.com/chrony/chrony.git synced 2025-12-03 17:35:06 -05:00
Code Issues Packages Projects Releases Wiki Activity

Add small randomness to spacing between samples for one server

Browse Source
This commit is contained in:
Miroslav Lichvar
2010-12-09 16:06:42 +01:00
parent d1b820e7e3
commit 833022b745
4 changed files with 26 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
sched.c
View File

@@ -129,6 +129,7 @@ handle_slew(struct timeval *raw,
void
SCH_Initialise(void)
{
struct timeval tv;
FD_ZERO(&read_fds);
n_read_fds = 0;
@@ -143,6 +144,9 @@ SCH_Initialise(void)
LCL_AddParameterChangeHandler(handle_slew, NULL);
LCL_ReadRawTime(&tv);
srandom(tv.tv_sec * tv.tv_usec);
initialised = 1;
return;
@@ -322,17 +326,23 @@ SCH_AddTimeoutByDelay(double delay, SCH_TimeoutHandler handler, SCH_ArbitraryArg
/* ================================================== */
SCH_TimeoutID
SCH_AddTimeoutInClass(double min_delay, double separation,
SCH_AddTimeoutInClass(double min_delay, double separation, double randomness,
SCH_TimeoutClass class,
SCH_TimeoutHandler handler, SCH_ArbitraryArgument arg)
{
TimerQueueEntry *new_tqe;
TimerQueueEntry *ptr;
struct timeval now;
double diff;
double diff, r;
double new_min_delay;
assert(initialised);
if (randomness > 0.0) {
r = random() % 0xffff / (0xffff - 1.0) * randomness + 1.0;
min_delay *= r;
separation *= r;
}
LCL_ReadRawTime(&now);
new_min_delay = min_delay;