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From: Sean Bruno <seanbru@yahoo-inc.com>
To: John Baldwin <jhb@freebsd.org>
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Date: Wed, 08 Aug 2012 09:59:23 -0700
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Cc: "freebsd-acpi@freebsd.org" <freebsd-acpi@freebsd.org>
Subject: Re: Time to increase MAX_TASKS?
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On Wed, 2012-08-08 at 04:25 -0700, John Baldwin wrote:
> I meant that with the limit jacked up to something that silences the
> warning
> (such as 128), what is the max number of tasks queued?
> 
> 

I set debug.acpi.max_tasks=128 and added a temp log message to
acpi_task_enqueue().  I see the system request *98* tasks according to
my test on this new Dell box.  Is it possible that the queue really
isn't running yet or something?

<snip>
AcpiOsExecute: acpi_task_count(98), acpi_max_tasks(128) max_threads(3)
<snip>


code modified to generate log message:

    for (at = NULL, i = 0; i < acpi_max_tasks; i++)
        if (atomic_cmpset_int(&acpi_tasks[i].at_flag, ACPI_TASK_FREE,
            ACPI_TASK_USED)) {
            at = &acpi_tasks[i];
            acpi_task_count++;
            if (acpi_task_count > 63)
                printf("AcpiOsExecute: acpi_task_count(%d),
acpi_max_tasks(%d) max_threads(%d)\n",
                        acpi_task_count, acpi_max_tasks,
acpi_max_threads);
            break;
        }