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Special Forums Hardware Filesystems, Disks and Memory SD Card Throughput exceeds - On using "dd" command Post 302305612 by pludi on Thursday 9th of April 2009 10:47:01 AM
Old 04-09-2009
What do you mean by "dd's own representation of the data"? The command he gave does just one thing: copy 20480*512 bytes (= 10485760 bytes = 10 MB) from /dev/zero (which always returns the \0 byte as fast as the processor can) to a file on the SD card. And AFAIK using dd to measure throughput is quite common, as it doesn't do any other stuff to the data.

It would be interesting what the numbers would be if you'd transfer 100 or 1000/1024 MB a few times.
 

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csx_Parse_CISTPL_MANFID(9F)				   Kernel Functions for Drivers 			       csx_Parse_CISTPL_MANFID(9F)

NAME
csx_Parse_CISTPL_MANFID - parse Manufacturer Identification tuple SYNOPSIS
#include <sys/pccard.h> int32_t csx_Parse_CISTPL_MANFID(client_handle_t ch, tuple_t *tu, cistpl_manfid_t *cm); INTERFACE LEVEL
Solaris DDI Specific (Solaris DDI) PARAMETERS
ch Client handle returned from csx_RegisterClient(9F). tu Pointer to a tuple_t structure (see tuple(9S)) returned by a call to csx_GetFirstTuple(9F) or csx_GetNextTuple(9F). cm Pointer to a cistpl_manfid_t structure which contains the parsed CISTPL_MANFID tuple information upon return from this function. DESCRIPTION
This function parses the Manufacturer Identification tuple, CISTPL_MANFID, into a form usable by PC Card drivers. The CISTPL_MANFID tuple is used to describe the information about the manufacturer of a PC Card. There are two types of information, the PC Card's manufacturer and a manufacturer card number. STRUCTURE MEMBERS
The structure members of cistpl_manfid_t are: uint32_t manf; /* PCMCIA assigned manufacturer code */ uint32_t card; /* manufacturer information (part number and/or revision) */ RETURN VALUES
CS_SUCCESS Successful operation. CS_BAD_HANDLE Client handle is invalid. CS_UNKNOWN_TUPLE Parser does not know how to parse tuple. CS_NO_CARD No PC Card in socket. CS_NO_CIS No Card Information Structure (CIS) on PC card. CS_UNSUPPORTED_FUNCTION No PCMCIA hardware installed. CONTEXT
This function may be called from user or kernel context. SEE ALSO
csx_GetFirstTuple(9F), csx_GetTupleData(9F), csx_RegisterClient(9F), csx_ValidateCIS(9F), tuple(9S) PC Card 95 Standard, PCMCIA/JEIDA SunOS 5.10 20 Dec 1996 csx_Parse_CISTPL_MANFID(9F)
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