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run de_analyze() back to back

Question asked by xuzhu on Jan 3, 2007
Latest reply on Jan 4, 2007 by mfredrik

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I need to properly run de_analyze() back-to-back.
I am looking at Mats' example of "batch simulation" (Example ID: 8610 in knowledge center). I am not sure how you did solve time issue between simulations in a batch sequence. What I am trying to do is to set a variable twice, and run de_analyze() after each setting.
The code is something like below. It seems to me ADS run everything except de_analyze() first, because I saw variable being changed from 0 (default start number) to 1 (my 1st setting) then 2 (my 2nd setting) before invoke any de_analyze.

**************************************************************************
defun test()
{
decl itemInfo0SP=de_edit_item("INPUT_VAR2");
de_set_item_id(itemInfo0SP, "INPUT_VAR2");
de_set_item_parameters(itemInfo0SP,list(list(prm("VarFormStdForm",prm("VarNameForm","specINDEX"),prm("VarValueForm","7")),prm("VarFormStdForm",prm("VarNameForm","specList"),prm("VarValueForm","\"Datafiles.txt\"")))));
de_end_edit_item(itemInfo0SP);
itemInfo0SP=de_free_item(itemInfo0SP);
de_analyze();

decl itemInfo0SP=de_edit_item("INPUT_VAR2");
de_set_item_id(itemInfo0SP, "INPUT_VAR2");
de_set_item_parameters(itemInfo0SP,list(list(prm("VarFormStdForm",prm("VarNameForm","specINDEX"),prm("VarValueForm","8")),prm("VarFormStdForm",prm("VarNameForm","specList"),prm("VarValueForm","\"Datafiles.txt\"")))));
de_end_edit_item(itemInfo0SP);
itemInfo0SP=de_free_item(itemInfo0SP);
de_analyze();

}
**************************************************************

Also, I cannot find out the function "desim_foreground_simulation_running()" in the last function call, "ckt_simulation_is_running()" from any reference. Is it some internal function?

Thanks,

Xu Zhu

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mfredrik Jan 3, 2007 10:33 AM

de_analyze() does not stop and wait until the simulation is done. You have use a timer callback, as I did in the batch simulation example. The timer callback is called once every second. It checks if the simultion is finished or not. If it is then the script runs the next design in the batch queue.

desim_foreground_simulation_running() is an undocumented function which returns TRUE if a simulation is running.

I tweaked the batch simulation code a bit to do something like what you want to do. See below.

One thing you probably want to add is to change the dataset name between the two simulations, otherwise the second simulation will overwrite the first.

-Mats

decl CKT_BATCH_QUEUE_STATE;
decl CKT_NUM = 1;

defun mybatch_simulation()
{

if(ckt_simulaion_is_running())
{
de_info("A circuit simulation is currently running.\nPlease wait until this simulation is done.");
return;
}

// desim_use_queued_simulators() was introduced in ADS 2004A
// This line makes sure the code works in earlier versions
if ( ! is_word( find_word( "desim_use_queued_simulators" ) ) )
execute( "defun desim_use_queued_simulators( ) { return FALSE; }" );

// Save the queue state
CKT_BATCH_QUEUE_STATE = desim_use_queued_simulators(FALSE);

mybatch_simulate_design();
}

defun mybatch_simulate_design()
{

if ( CKT_NUM == 1 ) {

// Open desired schematic
de_open_design("mybatch_test",FALSE); // Tweak to desired name..

decl itemInfo0SP=de_edit_item("INPUT_VAR2");
de_set_item_id(itemInfo0SP, "INPUT_VAR2");
de_set_item_parameters(itemInfo0SP,list(list(prm("VarFormStdForm",prm("VarNameForm","specINDEX"),prm("VarValueForm","7")),prm("VarFormStdForm",prm("VarNameForm","specList"),prm("VarValueForm","\"Datafiles.txt\"")))));
de_end_edit_item(itemInfo0SP);
itemInfo0SP=de_free_item(itemInfo0SP);
}
else {
decl itemInfo0SP=de_edit_item("INPUT_VAR2");
de_set_item_id(itemInfo0SP, "INPUT_VAR2");
de_set_item_parameters(itemInfo0SP,list(list(prm("VarFormStdForm",prm("VarNameForm","specINDEX"),prm("VarValueForm","8")),prm("VarFormStdForm",prm("VarNameForm","specList"),prm("VarValueForm","\"Datafiles.txt\"")))));
de_end_edit_item(itemInfo0SP);
itemInfo0SP=de_free_item(itemInfo0SP);
}

// Simulate it
decl wInst=api_get_current_window();
de_analyze();

// Wait for the simulation to finish
// install a timer function
api_set_timer("cktSimTimer", // timer name
1000, // number of milliseconds b/n calls
1, // auto repeat
"ckt_sim_check_timer_cb", // callback
NULL); // cbData of callback
}

defun ckt_sim_check_timer_cb (cbData, callData)
{

if (!ckt_simulaion_is_running())
{

// make sure to remove timer function
api_remove_timer("cktSimTimer");

// Increase Design Number
CKT_NUM++;

// More designs to simulate?
if ( CKT_NUM <= 2 )
mybatch_simulate_design();
else
{
// Reset the queue state
desim_use_queued_simulators(CKT_BATCH_QUEUE_STATE);
de_info("Done!");
}
}
}

defun ckt_simulaion_is_running()
{
decl dsnDir = de_current_design_name();
decl workDir = de_mom_get_working_dir(db_get_design(dsnDir));

if (desim_foreground_simulation_running())
{
return TRUE;
}
else
{
return FALSE;
}
}

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xuzhu Jan 4, 2007 10:03 AM

Mats,

Thanks for the code, it works and helps me a lot.

My understanding to your comments and code is that:
(1) de_analyze is running independently to other portion of AEL code when it is invoked.
(2) we use ckt_sim_check_timer_cb to check if the simulator is running before we invoke the sequence of de_analyze()

Does that mean we can distribute multiple execution of de_analyze() on different CPU? I mean doing parallel computing?

One question for your code:
What is desim_use_queued_simulators() function really doing? Is it another un-documented function?

Thanks,

Xu

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mfredrik Jan 4, 2007 10:48 AM

"
(1) de_analyze is running independently to other portion of AEL code when it is invoked.

"

Correct. It launches the simulation, which will take off in the background. The execution of the AEL code continues in parallell with the simulation.

"
Does that mean we can distribute multiple execution of de_analyze() on different CPU? I mean doing parallel computing?

"

I guess you could kick off multiple simulations using de_analyze() - although I'm not sure if the simulator would check out a new simulation license or not. BUT desim_foreground_simulation_running() will return TRUE if any simulation is running. You could not use that function to detect when one of your multiple simulations are done. The code would have to wait until all simulations were done to start the next simulation. There are ways around that though. You can setup a simulation to write a text file at the end of the simulation. You AEL code could monitor the disk for the existence of that file and in such way trigger the next simulation. But that is getting even more involved..

"
One question for your code:
What is desim_use_queued_simulators() function really doing? Is it another un-documented function?
"

Yes, it's another undocumented function. You need to call it with a FALSE argument before you run multiple simulations from AEL. Otherwise you will get an error message when the you try to launch your second simulation from the code. This function call is needed in ADS 2004A and later versions.

-Mats

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3 Replies

mfredrik Jan 3, 2007 10:33 AM
Mark Correct
Correct Answer
de_analyze() does not stop and wait until the simulation is done. You have use a timer callback, as I did in the batch simulation example. The timer callback is called once every second. It checks if the simultion is finished or not. If it is then the script runs the next design in the batch queue.

desim_foreground_simulation_running() is an undocumented function which returns TRUE if a simulation is running.

I tweaked the batch simulation code a bit to do something like what you want to do. See below.

One thing you probably want to add is to change the dataset name between the two simulations, otherwise the second simulation will overwrite the first.

-Mats

decl CKT_BATCH_QUEUE_STATE;
decl CKT_NUM = 1;

defun mybatch_simulation()
{

if(ckt_simulaion_is_running())
{
de_info("A circuit simulation is currently running.\nPlease wait until this simulation is done.");
return;
}

// desim_use_queued_simulators() was introduced in ADS 2004A
// This line makes sure the code works in earlier versions
if ( ! is_word( find_word( "desim_use_queued_simulators" ) ) )
execute( "defun desim_use_queued_simulators( ) { return FALSE; }" );

// Save the queue state
CKT_BATCH_QUEUE_STATE = desim_use_queued_simulators(FALSE);

mybatch_simulate_design();
}

defun mybatch_simulate_design()
{

if ( CKT_NUM == 1 ) {

// Open desired schematic
de_open_design("mybatch_test",FALSE); // Tweak to desired name..

decl itemInfo0SP=de_edit_item("INPUT_VAR2");
de_set_item_id(itemInfo0SP, "INPUT_VAR2");
de_set_item_parameters(itemInfo0SP,list(list(prm("VarFormStdForm",prm("VarNameForm","specINDEX"),prm("VarValueForm","7")),prm("VarFormStdForm",prm("VarNameForm","specList"),prm("VarValueForm","\"Datafiles.txt\"")))));
de_end_edit_item(itemInfo0SP);
itemInfo0SP=de_free_item(itemInfo0SP);
}
else {
decl itemInfo0SP=de_edit_item("INPUT_VAR2");
de_set_item_id(itemInfo0SP, "INPUT_VAR2");
de_set_item_parameters(itemInfo0SP,list(list(prm("VarFormStdForm",prm("VarNameForm","specINDEX"),prm("VarValueForm","8")),prm("VarFormStdForm",prm("VarNameForm","specList"),prm("VarValueForm","\"Datafiles.txt\"")))));
de_end_edit_item(itemInfo0SP);
itemInfo0SP=de_free_item(itemInfo0SP);
}

// Simulate it
decl wInst=api_get_current_window();
de_analyze();

// Wait for the simulation to finish
// install a timer function
api_set_timer("cktSimTimer", // timer name
1000, // number of milliseconds b/n calls
1, // auto repeat
"ckt_sim_check_timer_cb", // callback
NULL); // cbData of callback
}

defun ckt_sim_check_timer_cb (cbData, callData)
{

if (!ckt_simulaion_is_running())
{

// make sure to remove timer function
api_remove_timer("cktSimTimer");

// Increase Design Number
CKT_NUM++;

// More designs to simulate?
if ( CKT_NUM <= 2 )
mybatch_simulate_design();
else
{
// Reset the queue state
desim_use_queued_simulators(CKT_BATCH_QUEUE_STATE);
de_info("Done!");
}
}
}

defun ckt_simulaion_is_running()
{
decl dsnDir = de_current_design_name();
decl workDir = de_mom_get_working_dir(db_get_design(dsnDir));

if (desim_foreground_simulation_running())
{
return TRUE;
}
else
{
return FALSE;
}
}
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xuzhu Jan 4, 2007 10:03 AM
Mark Correct
Correct Answer
Mats,

Thanks for the code, it works and helps me a lot.

My understanding to your comments and code is that:
(1) de_analyze is running independently to other portion of AEL code when it is invoked.
(2) we use ckt_sim_check_timer_cb to check if the simulator is running before we invoke the sequence of de_analyze()

Does that mean we can distribute multiple execution of de_analyze() on different CPU? I mean doing parallel computing?

One question for your code:
What is desim_use_queued_simulators() function really doing? Is it another un-documented function?

Thanks,

Xu
Like • Show 0 Likes0
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mfredrik Jan 4, 2007 10:48 AM
Mark Correct
Correct Answer
"
(1) de_analyze is running independently to other portion of AEL code when it is invoked.

"
Correct. It launches the simulation, which will take off in the background. The execution of the AEL code continues in parallell with the simulation.

"
Does that mean we can distribute multiple execution of de_analyze() on different CPU? I mean doing parallel computing?

"
I guess you could kick off multiple simulations using de_analyze() - although I'm not sure if the simulator would check out a new simulation license or not. BUT desim_foreground_simulation_running() will return TRUE if any simulation is running. You could not use that function to detect when one of your multiple simulations are done. The code would have to wait until all simulations were done to start the next simulation. There are ways around that though. You can setup a simulation to write a text file at the end of the simulation. You AEL code could monitor the disk for the existence of that file and in such way trigger the next simulation. But that is getting even more involved..

"
One question for your code:
What is desim_use_queued_simulators() function really doing? Is it another un-documented function?
"
Yes, it's another undocumented function. You need to call it with a FALSE argument before you run multiple simulations from AEL. Otherwise you will get an error message when the you try to launch your second simulation from the code. This function call is needed in ADS 2004A and later versions.

-Mats
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