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Operating Systems Solaris Performance (iops) becomes bad, what is the reason? Post 302533143 by achenle on Wednesday 22nd of June 2011 08:34:46 PM
Old 06-22-2011
Quote:
Originally Posted by ForgetChen
Thank you for your replies!

Code:
 
the result with running vdbench with 1MB IO :

Jun 22, 2011 interval i/o MB/sec bytes read resp resp resp cpu% cpu%
rate 1024**2 i/o pct time max stddev sys+usr sys
16:06:21.052 31 782.00 782.00 1048576 100.00 149.715 161.195 0.493 4.5 4.3
16:06:22.051 32 781.00 781.00 1048576 100.00 149.697 161.233 0.475 4.5 4.2
16:06:23.051 33 781.00 781.00 1048576 100.00 148.282 154.836 2.734 4.7 4.3

The io rate is always very bad ,especial with 512 IO size.
Now I doubt the DMA property and buf struct in scsi_init_pkt function. But I didn't understand these fully.
If I'm reading that right, you're getting 781 MB/sec with 1 MB IO operations.

How fast do you think it should be going?
 

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Net::SIP::Request(3pm)					User Contributed Perl Documentation				    Net::SIP::Request(3pm)

NAME
Net::SIP::Request - handling of SIP request packets SYNOPSIS
my $req = Net::SIP::Request->new( 'INVITE',... ); my $ack = $req->create_ack(); DESCRIPTION
Subclass of Net::SIP::Packet for handling request packets. Has methods to create responses to requests and to authorize requests. EXAMPLES
# create INVITE request my $invite = Net::SIP::Request->new( 'INVITE', 'sip:you@example.com', { from => ..., to => ... }, Net::SIP::SDP->new( ... ) ); # somehow send request and retrieve response $resp ... if ( $resp->code eq '401' or $resp->code eq '407' ) { # need to authorize request $invite->authorize( $resp, [ username, password ] ); # somehow send again and retrieve response $resp ... } if ( $resp->code ~m{^[2345]dd} ) { # got final response, send ACK my $ack = $invite->create_ack( $resp ); # somehow send $ack ... } CONSTRUCTOR
Inherited from Net::SIP::Packet. See there. METHODS
method Get method of request. uri Get URI part of request. set_uri ( STRING ) Set URI of request to STRING set_cseq ( NUMBER ) Set sequence number if "CSeq" header to NUMBER. create_ack ( RESPONSE ) Returns Net::SIP::Request object for ACK request for the case when Net::SIP::Response RESPONSE was received in reply for packet $self. create_cancel Returns Net::SIP::Request object to cancel request in $self. create_response ( CODE, [MSG,] [ \%HEADER, BODY ] ) Returns Net::SIP::Response packet for the received request $self with numerical code CODE and text message MSG. Header for the response will be based on the request, but can be added or overridden using \%HEADER. If MSG is not given (e.g. argument is missing, second argument is \%HEADER already) a builtin message for the code will be used. For details to \%HEADER and BODY see new_from_parts in Net::SIP::Packet. authorize ( RESPONSE, AUTH ) Tries to authorize request $self based on the information in RESPONSE (a 401 or 407 "Authorization required" response) and AUTH. AUTH is either "[ user,pass ]" if a global authorization info exists for all realms or "{ realm1 => [ user1,pass1 ], realm2 => [ user2,pass2 ],... }" if different credentials are provided for different realms or a callback "callback(realm)->[user,pass]". The realms, for which authorization is needed, are read from RESPONSE. The request $self is modified in-place. If a modification occurred, e.g. if (parts of) the authorization requests could be resolved it will return TRUE, else FALSE. Supports only RFC2617 with md5 and empty qop or qop 'auth', not md5-sess or qop's like 'auth-int'. perl v5.14.2 2012-06-26 Net::SIP::Request(3pm)
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