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Add more advanced version of script edt_tstamp_diff_advanced.bt

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Signed-off-by: Jesper D. Brouer <netoptimizer@brouer.com>
This commit is contained in:
Jesper D. Brouer
2020-11-30 12:43:14 +01:00
parent 93116e0fb2
commit 381dd9a512
1 changed files with 59 additions and 0 deletions
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59
traffic-pacing-edt/bpftrace/edt_tstamp_diff_advanced.bt Executable file
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#!/usr/local/bin/bpftrace
#include <linux/skbuff.h>
// tracepoint:net:net_dev_start_xmit
tracepoint:net:net_dev_xmit
{
$skb = (struct sk_buff *)args->skbaddr;
//$tstamp = (uint64)$skb->tstamp;
$tstamp = $skb->skb_mstamp_ns;
$now = nsecs;
// if ($skb->mark > 0) {
if ($tstamp > 0) {
if ($now >= $tstamp) {
$diff_late = $now - $tstamp;
} else {
$diff_ahead = $tstamp - $now;
}
@tstamp_usec_diff_late = hist($diff_late / 1000);
@tstamp_usec_diff_ahead = hist($diff_ahead / 1000);
}
//$period = $now / 10000; /* 10000 = 10 usec */
$period = $now / 30000; /* 30000 = 30 usec */
if (@state[cpu] == $period) {
@state_bytes[cpu] += $skb->len;
} else {
@state[cpu] = $period;
if (@state_bytes[cpu] > 0) {
@byte_burst[cpu] = hist(@state_bytes[cpu]);
}
@state_bytes[cpu] = $skb->len; /* Reset counter */
}
}
tracepoint:qdisc:qdisc_dequeue
{
@qdisc_bulk_dequeue = lhist(args->packets, 0,64,1);
}
/*
kretfunc:dev_hard_start_xmit
{
// Wanted to know if ret == NETDEV_TX_BUSY
# ERROR: kfunc/kretfunc not available for your linked against bcc version.
}
*/
kprobe:qdisc_watchdog_schedule_range_ns
{
@qdisc_watchdog[cpu] = count();
}
kprobe:__netif_schedule
{
@__netif_schedule[cpu] = count();
}