Subject: RE: [sv-cc] VPIs for changing the log file..
From: Michael McNamara (mac@verisity.com)
Date: Tue Apr 15 2003 - 19:20:19 PDT
And indeed, manipulating the valuechange dumpfile from the VPI is very
likely not the right way to do things; rather one should just handle
this right from the Verilog, as we have been doing since 1987
(actually, the $swrite stuff is new with '2001, so I've included the
Verilog-XL way as well for the troglodytes)
initial begin : dump
integer i;
reg [8*40:0] dump_file_name;
for (i = 0; i < 1000; i = i + 1) begin
$dumpoff;
`ifdef 1364_2001
$swrite(dump_file_name,"mydump.%d",i);
`else
dump_file_name = {"mydump.",i};
`endif
$dumpfile(buf);
$dumpvars;
#1000000;
end
end
David W. Smith writes:
> This truly sounds like an issue that should be sent to the IEEE 1364
> committee. They are the owner of errata and enhancements like this. You may
> want to contact Cliff Cummings at Sunburst-Design.
> (cliffc@sunburst-design.com).
>
> The only work that Accellera is doing with VPI is in extending it to support
> the SystemVerilog extensions.
>
> Regards
> David
>
> David W. Smith
> Synopsys Scientist
>
> Synopsys, Inc.
> Synopsys Technology Park
> 2025 NW Cornelius Pass Road
> Hillsboro, OR 97124
>
> Voice: 503.547.6467
> Main: 503.547.6000
> FAX: 503.547.6906
> Email: david.smith@synopsys.com
> http://www.synopsys.com
>
>
>
> -----Original Message-----
> From: owner-sv-cc@eda.org [mailto:owner-sv-cc@eda.org] On Behalf Of
> Raghuraman R
> Sent: Monday, April 14, 2003 8:39 PM
> To: Joao.Geada@Synopsys.COM
> Cc: sv-cc@eda.org
> Subject: Re: [sv-cc] VPIs for changing the log file..
>
>
> Joao,
>
> Thanks for the response.
>
> So, there is no solution to change the log file midway during a
> simulation. With whom should this issue be taken up? Should VPI be
> enhanced or is it a problem of the simulator vendor and hence the issue
> to be taken up with him only?
>
> Thanks.
>
> Joao Geada wrote:
> > Raghuraman,
> >
> > as far as I am aware, VPI is currently forbidden to manipulate the log
> > file in use by the simulator (this is implicitly described in IEEE
> > 1364-2001, section 27.22, vpi_mcd_close)
> >
> > Specifically, there is an mcd channel describing the simulator log
> > file, but vpi cannot modify that stream (ie cannot close the current
> > stream and then reopen it to a different file)
> >
> > However, I believe you can get the name of the log file from
> > vpi_mcd_name (use channel descriptor 1 to get the log file)
> >
> > Joao
> >
> ============================================================================
> ==
> > Joao Geada, PhD Principal Engineer Verif Tech
> Group
> > Synopsys, Inc TEL: (508)
> 263-8083
> > 377 Simarano Drive, Suite 300, FAX: (508)
> 263-8069
> > Marlboro, MA 01752, USA
> > ======================================================================
> > ========
> >
> >
> > -----Original Message-----
> > From: owner-sv-cc@eda.org [mailto:owner-sv-cc@eda.org]On Behalf Of
> > Raghuraman R
> > Sent: Friday, April 11, 2003 4:24 AM
> > To: sv-cc@eda.org
> > Subject: [sv-cc] VPIs for changing the log file..
> >
> >
> > Hi,
> >
> > I would like to know if there is any vpi call to change the logfile
> > during simulation. I know of the vpi_mcd_* calls but it is for any
> > user-specific displays.
> >
> > For example, if I am running a big simulation job running for 48
> > hours, then the log file that gets generated is a 16 GB file or
> > so which cannot be edited or read easily. So if there is a vpi
> > call to change the log file, it will be good for the users, who
> > can look at the smaller log files. This is also needed when
> > multiple vector files are simulated in one run and users would
> > like to have one log for each file.
> >
> > The prototype could be
> >
> > int vpi_change_log("<file name>", mode (append|write));
> >
> > Similarly there should be a call to get the current log file name
> >
> > char * vpi_get_logfilename();
> >
> > Otherwise, logfile could be declared as an object which can be edited
> > using the vpi_put_value and value obtained through vpi_get_value. The
> > object type could be enumerated on the types of vpiBinStrVal etc.
>
>
> --
> Regds,
>
> Raghuraman R
> ASIC
> Texas Instruments (India) Ltd.
> Phone : +91-80-5099113
> http://www.india.ti.com/~raghu
>
> * Think. *
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