Here is a tc patch, which should minimize these boundaries, so please,
repeat this test with previous patches/conditions plus this one.

Thanks,
Jarek P.
---

 tc/tc_core.c |   10 +++++-----
 tc/tc_core.h |    4 ++--
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/tc/tc_core.c b/tc/tc_core.c
index 9a0ff39..6d74287 100644
--- a/tc/tc_core.c
+++ b/tc/tc_core.c

@@ -27,18 +27,18 @@

 static double tick_in_usec = 1;
 static double clock_factor = 1;

-int tc_core_time2big(unsigned time)
+int tc_core_time2big(double time)
 {
-       __u64 t = time;
+       __u64 t;

-       t *= tick_in_usec;
+       t = time * tick_in_usec + 0.5;
       return (t >> 32) != 0;
 }


-unsigned tc_core_time2tick(unsigned time)
+unsigned tc_core_time2tick(double time)
 {
-       return time*tick_in_usec;
+       return time * tick_in_usec + 0.5;
 }

 unsigned tc_core_tick2time(unsigned tick)

diff --git a/tc/tc_core.h b/tc/tc_core.h
index 5a693ba..0ac65aa 100644
--- a/tc/tc_core.h
+++ b/tc/tc_core.h

@@ -13,8 +13,8 @@ enum link_layer {

 };


-int  tc_core_time2big(unsigned time);
-unsigned tc_core_time2tick(unsigned time);
+int  tc_core_time2big(double time);
+unsigned tc_core_time2tick(double time);
 unsigned tc_core_tick2time(unsigned tick);
 unsigned tc_core_time2ktime(unsigned time);
 unsigned tc_core_ktime2time(unsigned ktime);