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| author | Lucas Nussbaum <lucas.nussbaum@ens-lyon.fr> | 2009-02-13 08:33:41 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-02-16 00:03:09 -0800 |
| commit | 06e868066e3b5828383eb40ff4d1c0029100b0b5 (patch) | |
| tree | 5fb84de9aff8a0b5d225a4c1137000ef6cc00dd5 /include/net/sctp | |
| parent | 85e8d004ecbc51ead6ae926e15973b42cf07b36e (diff) | |
| download | linux-06e868066e3b5828383eb40ff4d1c0029100b0b5.tar.gz linux-06e868066e3b5828383eb40ff4d1c0029100b0b5.tar.xz | |
sctp: Allow to disable SCTP checksums via module parameter
This is a new version of my patch, now using a module parameter instead
of a sysctl, so that the option is harder to find. Please note that,
once the module is loaded, it is still possible to change the value of
the parameter in /sys/module/sctp/parameters/, which is useful if you
want to do performance comparisons without rebooting.
Computation of SCTP checksums significantly affects the performance of
SCTP. For example, using two dual-Opteron 246 connected using a Gbe
network, it was not possible to achieve more than ~730 Mbps, compared to
941 Mbps after disabling SCTP checksums.
Unfortunately, SCTP checksum offloading in NICs is not commonly
available (yet).
By default, checksums are still enabled, of course.
Signed-off-by: Lucas Nussbaum <lucas.nussbaum@ens-lyon.fr>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/sctp')
| -rw-r--r-- | include/net/sctp/structs.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h index 9661d7b765f0..9f70d54fcefc 100644 --- a/include/net/sctp/structs.h +++ b/include/net/sctp/structs.h @@ -218,6 +218,10 @@ extern struct sctp_globals { /* Flag to idicate if SCTP-AUTH is enabled */ int auth_enable; + + /* Flag to indicate whether computing and verifying checksum + * is disabled. */ + int checksum_disable; } sctp_globals; #define sctp_rto_initial (sctp_globals.rto_initial) @@ -252,6 +256,7 @@ extern struct sctp_globals { #define sctp_addip_noauth (sctp_globals.addip_noauth_enable) #define sctp_prsctp_enable (sctp_globals.prsctp_enable) #define sctp_auth_enable (sctp_globals.auth_enable) +#define sctp_checksum_disable (sctp_globals.checksum_disable) /* SCTP Socket type: UDP or TCP style. */ typedef enum { |