[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/app/iproute2/iproute2-3.4.0/tc/tc_cbq.c b/ap/app/iproute2/iproute2-3.4.0/tc/tc_cbq.c
new file mode 100755
index 0000000..0bb262e
--- /dev/null
+++ b/ap/app/iproute2/iproute2-3.4.0/tc/tc_cbq.c
@@ -0,0 +1,57 @@
+/*
+ * tc_cbq.c CBQ maintanance routines.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <syslog.h>
+#include <fcntl.h>
+#include <math.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+
+#include "tc_core.h"
+#include "tc_cbq.h"
+
+unsigned tc_cbq_calc_maxidle(unsigned bndw, unsigned rate, unsigned avpkt,
+ int ewma_log, unsigned maxburst)
+{
+ double maxidle;
+ double g = 1.0 - 1.0/(1<<ewma_log);
+ double xmt = (double)avpkt/bndw;
+
+ maxidle = xmt*(1-g);
+ if (bndw != rate && maxburst) {
+ double vxmt = (double)avpkt/rate - xmt;
+ vxmt *= (pow(g, -(double)maxburst) - 1);
+ if (vxmt > maxidle)
+ maxidle = vxmt;
+ }
+ return tc_core_time2tick(maxidle*(1<<ewma_log)*TIME_UNITS_PER_SEC);
+}
+
+unsigned tc_cbq_calc_offtime(unsigned bndw, unsigned rate, unsigned avpkt,
+ int ewma_log, unsigned minburst)
+{
+ double g = 1.0 - 1.0/(1<<ewma_log);
+ double offtime = (double)avpkt/rate - (double)avpkt/bndw;
+
+ if (minburst == 0)
+ return 0;
+ if (minburst == 1)
+ offtime *= pow(g, -(double)minburst) - 1;
+ else
+ offtime *= 1 + (pow(g, -(double)(minburst-1)) - 1)/(1-g);
+ return tc_core_time2tick(offtime*TIME_UNITS_PER_SEC);
+}