mirrors/bird
mirrors/bird
0
0
Fork 0
mirror of https://gitlab.nic.cz/labs/bird.git synced 2024-12-22 01:31:55 +00:00
Code Releases Activity

Time accounting must be done by coarse timers

Browse Source 
on some ARM, the precise timers are too slow to be actually useful
This commit is contained in:
Maria Matejka 2024-06-10 23:09:05 +02:00
parent 4d01ca3e8f
commit 5c8179d63a
3 changed files with 43 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
aclocal.m4 vendored
View File

@ -120,6 +120,31 @@ AC_DEFUN([BIRD_CHECK_MPLS_KERNEL],
)
])
AC_DEFUN([BIRD_CHECK_CLOCK],
[
AC_CACHE_CHECK(
[for $1],
[bird_cv_clock_$1],
[
AC_COMPILE_IFELSE(
[
AC_LANG_PROGRAM(
[
#include <time.h>
],
[
struct timespec tv;
clock_gettime($1, &tv);
]
)
],
[bird_cv_clock_$1=yes],
[bird_cv_clock_$1=no]
)
]
)
])
AC_DEFUN([BIRD_CHECK_ANDROID_GLOB],
[
AC_CACHE_CHECK(

12
configure.ac
View File

@ -308,6 +308,18 @@ if test "$enable_mpls_kernel" != no ; then
fi
fi
BIRD_CHECK_CLOCK(CLOCK_MONOTONIC)
if test "$bird_cv_clock_CLOCK_MONOTONIC" != yes ; then
AC_MSG_ERROR([Monotonic clock not supported])
fi
BIRD_CHECK_CLOCK(CLOCK_MONOTONIC_COARSE)
if test "$bird_cv_clock_CLOCK_MONOTONIC_COARSE" != yes ; then
AC_DEFINE([HAVE_CLOCK_MONOTONIC_COARSE], [0], [Define to 1 if coarse clock is available])
else
AC_DEFINE([HAVE_CLOCK_MONOTONIC_COARSE], [1], [Define to 1 if coarse clock is available])
fi
# temporarily removed "mrt" from all_protocols to speed up 3.0-alpha1 release
all_protocols="aggregator bfd babel bgp l3vpn ospf pipe radv rip rpki static"
all_protocols=`echo $all_protocols | sed 's/ /,/g'`

8
sysdep/unix/io-loop.c
View File

@ -42,11 +42,15 @@ static struct birdloop *birdloop_new_no_pickup(pool *pp, uint order, const char
* BIRD for such a long time, please implement some means of overflow prevention.
*/
#if ! HAVE_CLOCK_MONOTONIC_COARSE
#define CLOCK_MONOTONIC_COARSE CLOCK_MONOTONIC
#endif
static struct timespec ns_begin;
static void ns_init(void)
{
if (clock_gettime(CLOCK_MONOTONIC, &ns_begin))
if (clock_gettime(CLOCK_MONOTONIC_COARSE, &ns_begin))
bug("clock_gettime: %m");
}
@ -55,7 +59,7 @@ static void ns_init(void)
u64 ns_now(void)
{
struct timespec ts;
if (clock_gettime(CLOCK_MONOTONIC, &ts))
if (clock_gettime(CLOCK_MONOTONIC_COARSE, &ts))
bug("clock_gettime: %m");
return (u64) (ts.tv_sec - ns_begin.tv_sec) * NSEC_IN_SEC + ts.tv_nsec - ns_begin.tv_nsec;