On 12/3/2020 1:59 PM, George Prekas wrote:
Insert a compiler barrier to make sure that the IP checksum calculation
happens after setting all the fields of the IP header.
Can you please provide the compiler details, and if there is any specific
instruction on how to reproduce this failure?
Signed-off-by: George Prekas <preka...@amazon.com>
---
app/test-pmd/flowgen.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/app/test-pmd/flowgen.c b/app/test-pmd/flowgen.c
index acf3e2460..893b4b0b8 100644
--- a/app/test-pmd/flowgen.c
+++ b/app/test-pmd/flowgen.c
@@ -150,6 +150,7 @@ pkt_burst_flow_gen(struct fwd_stream *fs)
next_flow);
ip_hdr->total_length = RTE_CPU_TO_BE_16(pkt_size -
sizeof(*eth_hdr));
+ rte_compiler_barrier();
ip_hdr->hdr_checksum = ip_sum((unaligned_uint16_t *)ip_hdr,
sizeof(*ip_hdr));
