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| author |   Vadym Martsynovskyy <vmartsyn@fb.com> | 2020-06-12 09:50:50 -0700 |
|---|---|---|
| committer |   Andrew Yourtchenko <ayourtch@gmail.com> | 2020-08-18 19:47:21 +0000 |
| commit | 347a225866851b88ed595e5a7ecde01e9c0b3260 (patch) | |
| tree | 6581d13739b00628b5ab4aa8959cc02416080786 /src/vnet/tcp/tcp_output.c | |
| parent | 86a5a5d5c23ee7ee81967b2fb96b000f9e6ba11f (diff) | |
udp: align udp_encap_t_ to 2 cachelines
Based on the comments in the struct, udp_encap_t_ is meant to span 2
cachelines. Due to the 64 bit alignment of dpo_id_t, the struct spanned
3 cachelines. This caused fetching ue_ip_proto to trigger an additional
cache miss. This patch rearranges the ordering of the struct fields
so that udp_encap_t_ only spans 2 cachelines as intended.
before:
(gdb) print (int)&((struct udp_encap_t_*)0)->cacheline1
$8 = 128
after:
(gdb) print (int)&((struct udp_encap_t_*)0)->cacheline1
$1 = 64
Type: fix
Signed-off-by: Vadym Martsynovskyy <vmartsyn@fb.com>
Change-Id: I066c08654d4a8ef3e2d3954e957d4c5d382b209f
(cherry picked from commit 42386fc974148f812ef3eb73ff09a603caa23565)
Diffstat (limited to 'src/vnet/tcp/tcp_output.c')
0 files changed, 0 insertions, 0 deletions