From 27d978c9136e903244113a7ab57acea4b496898e Mon Sep 17 00:00:00 2001 From: Dave Barach Date: Tue, 3 Nov 2020 09:59:06 -0500 Subject: vlib: add postmortem pcap dispatch trace Inspired by a real-life conundrum: scenario X involves a vpp crash in ip4-load-balance because vnet_buffer(b)->ip.adj_index[VLIB_TX] is (still) set to ~0. The problem takes most of a day to occur, and we need to see the broken packet's graph trajectory, metadata, etc. to understand the problem. Fix a signed/unsigned ASSERT bug in vlib_get_trace_count(). Rename elog_post_mortem_dump() -> vlib_post_mortem_dump(), add dispatch trace post-mortem dump. Add FILTER_FLAG_POST_MORTEM so we can (putatively) capture a ludicrous number of buffer traces, without actually using more than one dispatch cycle's worth of memory. Type: improvement Signed-off-by: Dave Barach Change-Id: If093202ef071df46e290370bd9b33bf6560d30e6 --- src/vlib/trace.h | 1 + 1 file changed, 1 insertion(+) (limited to 'src/vlib/trace.h') diff --git a/src/vlib/trace.h b/src/vlib/trace.h index 54b7c294569..ae9bd6913d3 100644 --- a/src/vlib/trace.h +++ b/src/vlib/trace.h @@ -91,6 +91,7 @@ typedef struct #define FILTER_FLAG_NONE 0 #define FILTER_FLAG_INCLUDE 1 #define FILTER_FLAG_EXCLUDE 2 +#define FILTER_FLAG_POST_MORTEM 3 u32 filter_count; /* set on trace add, cleared on clear trace */ -- cgit 1.2.3-korg