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/* $Id: int-1.d $ */
/** @file
* DTracing VBox - Interrupt Experiment #1.
*/
/*
* Copyright (C) 2012-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#pragma D option quiet
uint64_t g_aStarts[uint32_t];
uint64_t g_cUntaggedHighs;
uint64_t g_cUntaggedGets;
uint64_t g_cMissedHighs;
inline uint32_t kfDevIdMask = 0x3ff;
/*
* Timestamp the when the device raises the IRQ.
*/
vboxvmm*:::pdm-irq-high,vboxvmm*:::pdm-irq-hilo
/args[1] != 0/
{
/*printf("high: tag=%#x src=%d %llx -> %llx\n", args[1], args[2], g_aStarts[args[1]], timestamp);*/
g_aStarts[args[1]] = timestamp;
}
vboxvmm*:::pdm-irq-high,vboxvmm*:::pdm-irq-hilo
/args[1] == 0/
{
g_cUntaggedHighs++;
}
/*
* Catch the CPU getting the IRQ from the (A)PIC and preparing for injection.
*/
vboxvmm*:::pdm-irq-get
/g_aStarts[args[1]] == 0 && args[1] != 0/
{
printf("get: tag=%#x src=%d %llx - %llx = %llx\n", args[1], args[2], timestamp, g_aStarts[args[1]], timestamp - g_aStarts[args[1]]);
@g_MissedHighs[args[3], args[2] & kfDevIdMask] = count();
g_cMissedHighs++;
}
vboxvmm*:::pdm-irq-get
/g_aStarts[args[1]] > 0 && args[1] != 0/
{
/*printf("get: tag=%#x src=%d %llx - %llx = %llx\n", args[1], args[2], timestamp, g_aStarts[args[1]], timestamp - g_aStarts[args[1]]);*/
@g_Interrupts[args[3], args[2] & kfDevIdMask] = count();
@g_DispAvg[ args[3], args[2] & kfDevIdMask] = avg(timestamp - g_aStarts[args[1]]);
@g_DispMax[ args[3], args[2] & kfDevIdMask] = max(timestamp - g_aStarts[args[1]]);
@g_DispMin[ args[3], args[2] & kfDevIdMask] = min(timestamp - g_aStarts[args[1]]);
g_aStarts[args[1]] = 0;
g_cHits++;
}
vboxvmm*:::pdm-irq-get
/args[1] == 0/
{
@g_UntaggedGets[args[3]] = count();
g_cUntaggedGets++;
}
vboxvmm*:::pdm-irq-get
/args[2] > kfDevIdMask/
{
@g_Shared[args[3], args[2] & kfDevIdMask] = count();
}
/* For the time being, quit after 256 interrupts. */
vboxvmm*:::pdm-irq-get
/g_cHits >= 256/
{
exit(0);
}
/*
* Catch the device clearing the IRQ.
*/
/*
* Report.
*/
END
{
printf("\nInterrupt distribution:\n");
printa(" irq %3d dev %2d %@12u\n", @g_Interrupts);
printf("Interrupt sharing (devices detect pushing a line high at the same time):\n");
printa(" irq %3d dev %2d %@12u\n", @g_Shared);
printf("Minimum dispatch latency:\n");
printa(" irq %3d dev %2d %@12u ns\n", @g_DispMin);
printf("Average dispatch latency:\n");
printa(" irq %3d dev %2d %@12u ns\n", @g_DispAvg);
printf("Maximum dispatch latency:\n");
printa(" irq %3d dev %2d %@12u ns\n", @g_DispMax);
}
END
/g_cUntaggedHighs > 0/
{
printf("Untagged highs: %u\n", g_cUntaggedHighs);
}
END
/g_cUntaggedGets > 0/
{
printf("Untagged gets: %u\n", g_cUntaggedGets);
printa(" irq %3d %@12u\n", @g_UntaggedGets);
}
END
/g_cMissedHighs > 0/
{
printf("Missed (or shared?) highs: %u\n", g_cMissedHighs);
printa(" irq %3d dev %2d %@12u\n", @g_MissedHighs);
}
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