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kttcp(4) [netbsd man page]

KTTCP(4)						   BSD Kernel Interfaces Manual 						  KTTCP(4)

NAME
kttcp -- kernel support for testing network throughput SYNOPSIS
pseudo-device kttcp DESCRIPTION
This driver provides kernel support for testing network throughput from the perspective of the kernel. It is similar in spirit to the clas- sic ttcp network benchmark program, the main difference being that with kttcp, the kernel is the source and sink of the data. Testing like this is useful for a few reasons: 1. This allows us to know what kind of performance we can expect from network applications that run in the kernel space, such as the NFS server or the NFS client. These applications don't have to move the data to/from userspace, and so benchmark programs which run in userspace don't give us an accurate model. 2. Since data received is just thrown away, the receiver is very fast. This can provide better exercise for the sender at the other end. 3. Since the NetBSD kernel currently uses a run-to-completion scheduling model, kttcp provides a benchmark model where preemption of the benchmark program is not an issue. SEE ALSO
pkgsrc/benchmarks/kttcp, pkgsrc/benchmarks/ttcp BSD
December 2, 2006 BSD

Check Out this Related Man Page

RUMP_SMBFS(8)						    BSD System Manager's Manual 					     RUMP_SMBFS(8)

NAME
rump_smbfs -- mount a smbfs share with a userspace server SYNOPSIS
file-system PUFFS pseudo-device putter rump_smbfs [options] share mountpoint DESCRIPTION
NOTE! This manual page describes features specific to the rump(3) file server. Please see mount_smbfs(8) for a full description of the available command line options. The rump_smbfs utility can be used to mount smbfs file systems. It uses rump(3) and p2k(3) to facilitate running the file system as a server in userspace. As opposed to mount_smbfs(8), rump_smbfs does not use file system code within the kernel and therefore does not require kernel support except puffs(4). Apart from a minor speed penalty there is no downside with respect to in-kernel code. Even though the rump_smbfs file system client runs within a virtual rump kernel in userspace, it uses host network services (by means of ``rump sockin''). This means that regardless of whether using rump_smbfs or mount_smbfs(8), the same network configurations will be used. Currently, ``sockin'' supports IPv4. To use rump_smbfs via mount(8), the flags -o rump and -t smbfs should be given. Similarly, rump_smbfs is used instead of mount_smbfs(8) if ``rump'' is added to the options field of fstab(5). SEE ALSO
p2k(3), puffs(3), rump(3), mount_smbfs(8) HISTORY
The rump_smbfs utility first appeared in NetBSD 6.0. BSD
November 21, 2010 BSD
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