user/sven/linux.git/include/linux/gen_stats.h, branch v3.2.65Linux Kernel
https://git.stealer.net/cgit.cgi/user/sven/linux.git/atom?h=v3.2.652009-11-04T17:50:58Znet: cleanup include/linux2009-11-04T17:50:58ZEric Dumazeteric.dumazet@gmail.com2009-11-04T17:50:58Zurn:sha1:d94d9fee9fa4e66a0b91640a694b8b10177075b3
This cleanup patch puts struct/union/enum opening braces,
in first line to ease grep games.
struct something
{
becomes :
struct something {
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net: restore gnet_stats_basic to previous definition2009-08-18T04:33:49ZEric Dumazeteric.dumazet@gmail.com2009-08-16T09:36:49Zurn:sha1:c1a8f1f1c8e01eab5862c8db39b49ace814e6c66
In 5e140dfc1fe87eae27846f193086724806b33c7d "net: reorder struct Qdisc
for better SMP performance" the definition of struct gnet_stats_basic
changed incompatibly, as copies of this struct are shipped to
userland via netlink.
Restoring old behavior is not welcome, for performance reason.
Fix is to use a private structure for kernel, and
teach gnet_stats_copy_basic() to convert from kernel to user land,
using legacy structure (struct gnet_stats_basic)
Based on a report and initial patch from Michael Spang.
Reported-by: Michael Spang <mspang@csclub.uwaterloo.ca>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net: reorder struct Qdisc for better SMP performance2009-03-20T08:33:32ZEric Dumazetdada1@cosmosbay.com2009-03-20T08:33:32Zurn:sha1:5e140dfc1fe87eae27846f193086724806b33c7d
dev_queue_xmit() needs to dirty fields "state", "q", "bstats" and "qstats"
On x86_64 arch, they currently span three cache lines, involving more
cache line ping pongs than necessary, making longer holding of queue spinlock.
We can reduce this to one cache line, by grouping all read-mostly fields
at the beginning of structure. (Or should I say, all highly modified fields
at the end :) )
Before patch :
offsetof(struct Qdisc, state)=0x38
offsetof(struct Qdisc, q)=0x48
offsetof(struct Qdisc, bstats)=0x80
offsetof(struct Qdisc, qstats)=0x90
sizeof(struct Qdisc)=0xc8
After patch :
offsetof(struct Qdisc, state)=0x80
offsetof(struct Qdisc, q)=0x88
offsetof(struct Qdisc, bstats)=0xa0
offsetof(struct Qdisc, qstats)=0xac
sizeof(struct Qdisc)=0xc0
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
[GNET_STATS]: kernel-api doc for gnet stats/estimator2004-11-30T14:02:46ZThomas Graftgraf@suug.ch2004-11-30T14:02:46Zurn:sha1:d3f58c34c2a49bc9691f052ceb524a88ee46eadd
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
[NET]: Generic network statistics/estimator2004-10-05T06:38:47ZDavid S. Millerdavem@nuts.davemloft.net2004-10-05T06:38:47Zurn:sha1:05529e0e46056e6bc4c43324f8d4e357334956b1
Work done by Thomas Graf <tgraf@suug.ch> and
Jamal Hadi Salim <hadi@cyberus.ca>
The following patchset introduces generic network statistics for
netlink users. It uses nested TLV which prevents further compatibility
problems when introducing new statistics. Backward compatibility to
existing TLV types TCA_STATS and TCA_XSTATS is ensured but can be
easly removed once it is no longer needed. Therefore prior users of
struct tc_stats can be converted to this API and existing userspace
applications will not notice a difference while converted applications
can use the new extendable statistic interface.
Changes:
- Add generic network statistics API for netlink users.
- Introduces a generic rate estimator based on timers. Patch is based
on Jamals patch and adapted to the new generic network statistics
API.
- Add documentation of generic network statistics and estimator API.
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>