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authorArnaldo Carvalho de Melo <acme@redhat.com>2008-02-03 04:06:59 -0800
committerDavid S. Miller <davem@davemloft.net>2008-02-03 04:28:52 -0800
commit4e7e5cfe3825b4d854fc005d784a6f551b3c039f (patch)
tree0facec726e4a8f410e74d30234bb8f4894f8c186 /lib/locking-selftest-wsem.h
parentab1e0a13d70299e792fd0527cefd070c1405fa5b (diff)
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[INET6]: Reorganize struct inet6_dev to save 8 bytes
And make it a multiple of a 64 bytes, reducing cacheline trashing: Before: [acme@doppio net-2.6]$ pahole -C inet6_dev net/dccp/ipv6.o struct inet6_dev { <SNIP> long unsigned int mc_maxdelay; /* 48 8 */ unsigned char mc_qrv; /* 56 1 */ unsigned char mc_gq_running; /* 57 1 */ unsigned char mc_ifc_count; /* 58 1 */ /* XXX 5 bytes hole, try to pack */ /* --- cacheline 1 boundary (64 bytes) --- */ struct timer_list mc_gq_timer; /* 64 48 */ <SNIP> __u32 if_flags; /* 180 4 */ int dead; /* 184 4 */ u8 rndid[8]; /* 188 8 */ /* XXX 4 bytes hole, try to pack */ /* --- cacheline 3 boundary (192 bytes) was 8 bytes ago --- */ struct timer_list regen_timer; /* 200 48 */ <SNIP> /* size: 456, cachelines: 8 */ /* sum members: 447, holes: 2, sum holes: 9 */ /* last cacheline: 8 bytes */ }; After: net-2.6/net/ipv6/af_inet6.c: struct inet6_dev | -8 1 struct changed Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib/locking-selftest-wsem.h')
0 files changed, 0 insertions, 0 deletions
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