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/* $Id: tstRTFileAio.cpp $ */
/** @file
* IPRT Testcase - File Async I/O.
*/
/*
* Copyright (C) 2006-2023 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>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <iprt/file.h>
#include <iprt/err.h>
#include <iprt/mem.h>
#include <iprt/param.h>
#include <iprt/string.h>
#include <iprt/test.h>
/*********************************************************************************************************************************
* Defined Constants And Macros *
*********************************************************************************************************************************/
/** @todo make configurable through cmd line. */
#define TSTFILEAIO_MAX_REQS_IN_FLIGHT 64
#define TSTFILEAIO_BUFFER_SIZE (64*_1K)
/*********************************************************************************************************************************
* Global Variables *
*********************************************************************************************************************************/
static RTTEST g_hTest = NIL_RTTEST;
void tstFileAioTestReadWriteBasic(RTFILE File, bool fWrite, void *pvTestBuf,
size_t cbTestBuf, size_t cbTestFile, uint32_t cMaxReqsInFlight)
{
/* Allocate request array. */
RTFILEAIOREQ *paReqs;
paReqs = (PRTFILEAIOREQ)RTTestGuardedAllocHead(g_hTest, cMaxReqsInFlight * sizeof(RTFILEAIOREQ));
RTTESTI_CHECK_RETV(paReqs);
RT_BZERO(paReqs, cMaxReqsInFlight * sizeof(RTFILEAIOREQ));
/* Allocate array holding pointer to data buffers. */
void **papvBuf = (void **)RTTestGuardedAllocHead(g_hTest, cMaxReqsInFlight * sizeof(void *));
RTTESTI_CHECK_RETV(papvBuf);
/* Allocate the buffers*/
for (unsigned i = 0; i < cMaxReqsInFlight; i++)
{
RTTESTI_CHECK_RC_OK_RETV(RTTestGuardedAlloc(g_hTest, cbTestBuf, PAGE_SIZE, true /*fHead*/, &papvBuf[i]));
if (fWrite)
memcpy(papvBuf[i], pvTestBuf, cbTestBuf);
if (fWrite)
memcpy(papvBuf[i], pvTestBuf, cbTestBuf);
else
RT_BZERO(papvBuf[i], cbTestBuf);
}
/* Allocate array holding completed requests. */
RTFILEAIOREQ *paReqsCompleted;
paReqsCompleted = (PRTFILEAIOREQ)RTTestGuardedAllocHead(g_hTest, cMaxReqsInFlight * sizeof(RTFILEAIOREQ));
RTTESTI_CHECK_RETV(paReqsCompleted);
RT_BZERO(paReqsCompleted, cMaxReqsInFlight * sizeof(RTFILEAIOREQ));
/* Create a context and associate the file handle with it. */
RTFILEAIOCTX hAioContext;
RTTESTI_CHECK_RC_RETV(RTFileAioCtxCreate(&hAioContext, cMaxReqsInFlight, 0 /* fFlags */), VINF_SUCCESS);
RTTESTI_CHECK_RC_RETV(RTFileAioCtxAssociateWithFile(hAioContext, File), VINF_SUCCESS);
/* Initialize requests. */
for (unsigned i = 0; i < cMaxReqsInFlight; i++)
RTFileAioReqCreate(&paReqs[i]);
RTFOFF off = 0;
int cRuns = 0;
uint64_t NanoTS = RTTimeNanoTS();
size_t cbLeft = cbTestFile;
while (cbLeft)
{
int rc;
int cReqs = 0;
for (unsigned i = 0; i < cMaxReqsInFlight; i++)
{
size_t cbTransfer = cbLeft < cbTestBuf ? cbLeft : cbTestBuf;
if (!cbTransfer)
break;
if (fWrite)
rc = RTFileAioReqPrepareWrite(paReqs[i], File, off, papvBuf[i],
cbTransfer, papvBuf[i]);
else
rc = RTFileAioReqPrepareRead(paReqs[i], File, off, papvBuf[i],
cbTransfer, papvBuf[i]);
RTTESTI_CHECK_RC(rc, VINF_SUCCESS);
cbLeft -= cbTransfer;
off += cbTransfer;
cReqs++;
}
rc = RTFileAioCtxSubmit(hAioContext, paReqs, cReqs);
RTTESTI_CHECK_MSG(rc == VINF_SUCCESS, ("Failed to submit tasks after %d runs. rc=%Rrc\n", cRuns, rc));
if (rc != VINF_SUCCESS)
break;
/* Wait */
uint32_t cCompleted = 0;
RTTESTI_CHECK_RC(rc = RTFileAioCtxWait(hAioContext, cReqs, RT_INDEFINITE_WAIT,
paReqsCompleted, cMaxReqsInFlight, &cCompleted),
VINF_SUCCESS);
if (rc != VINF_SUCCESS)
break;
if (!fWrite)
{
for (uint32_t i = 0; i < cCompleted; i++)
{
/* Compare that we read the right stuff. */
void *pvBuf = RTFileAioReqGetUser(paReqsCompleted[i]);
RTTESTI_CHECK(pvBuf);
size_t cbTransfered;
RTTESTI_CHECK_RC(rc = RTFileAioReqGetRC(paReqsCompleted[i], &cbTransfered), VINF_SUCCESS);
if (rc != VINF_SUCCESS)
break;
RTTESTI_CHECK_MSG(cbTransfered == cbTestBuf, ("cbTransfered=%zd\n", cbTransfered));
RTTESTI_CHECK_RC_OK(rc = (memcmp(pvBuf, pvTestBuf, cbTestBuf) == 0 ? VINF_SUCCESS : VERR_BAD_EXE_FORMAT));
if (rc != VINF_SUCCESS)
break;
memset(pvBuf, 0, cbTestBuf);
}
}
cRuns++;
if (RT_FAILURE(rc))
break;
}
NanoTS = RTTimeNanoTS() - NanoTS;
uint64_t SpeedKBs = (uint64_t)((double)cbTestFile / ((double)NanoTS / 1000000000.0) / 1024);
RTTestValue(g_hTest, "Throughput", SpeedKBs, RTTESTUNIT_KILOBYTES_PER_SEC);
/* cleanup */
for (unsigned i = 0; i < cMaxReqsInFlight; i++)
RTTestGuardedFree(g_hTest, papvBuf[i]);
RTTestGuardedFree(g_hTest, papvBuf);
for (unsigned i = 0; i < cMaxReqsInFlight; i++)
RTTESTI_CHECK_RC(RTFileAioReqDestroy(paReqs[i]), VINF_SUCCESS);
RTTESTI_CHECK_RC(RTFileAioCtxDestroy(hAioContext), VINF_SUCCESS);
RTTestGuardedFree(g_hTest, paReqs);
}
int main()
{
int rc = RTTestInitAndCreate("tstRTFileAio", &g_hTest);
if (rc)
return rc;
/* Check if the API is available. */
RTTestSub(g_hTest, "RTFileAioGetLimits");
RTFILEAIOLIMITS AioLimits;
RT_ZERO(AioLimits);
RTTESTI_CHECK_RC(rc = RTFileAioGetLimits(&AioLimits), VINF_SUCCESS);
if (RT_SUCCESS(rc))
{
RTTestSub(g_hTest, "Write");
RTFILE hFile;
RTFSTYPE enmType;
bool fAsyncMayFail = false;
rc = RTFsQueryType("tstFileAio#1.tst", &enmType);
if ( RT_SUCCESS(rc)
&& enmType == RTFSTYPE_TMPFS)
fAsyncMayFail = true;
rc = RTFileOpen(&hFile, "tstFileAio#1.tst",
RTFILE_O_READWRITE | RTFILE_O_CREATE_REPLACE | RTFILE_O_DENY_NONE | RTFILE_O_ASYNC_IO);
RTTESTI_CHECK( rc == VINF_SUCCESS
|| ((rc == VERR_ACCESS_DENIED || rc == VERR_INVALID_PARAMETER) && fAsyncMayFail));
if (RT_SUCCESS(rc))
{
uint8_t *pbTestBuf = (uint8_t *)RTTestGuardedAllocTail(g_hTest, TSTFILEAIO_BUFFER_SIZE);
for (unsigned i = 0; i < TSTFILEAIO_BUFFER_SIZE; i++)
pbTestBuf[i] = i % 256;
uint32_t cReqsMax = AioLimits.cReqsOutstandingMax < TSTFILEAIO_MAX_REQS_IN_FLIGHT
? AioLimits.cReqsOutstandingMax
: TSTFILEAIO_MAX_REQS_IN_FLIGHT;
/* Basic write test. */
RTTestIPrintf(RTTESTLVL_ALWAYS, "Preparing test file, this can take some time and needs quite a bit of harddisk space...\n");
tstFileAioTestReadWriteBasic(hFile, true /*fWrite*/, pbTestBuf, TSTFILEAIO_BUFFER_SIZE, 100*_1M, cReqsMax);
/* Reopen the file before doing the next test. */
RTTESTI_CHECK_RC(RTFileClose(hFile), VINF_SUCCESS);
if (RTTestErrorCount(g_hTest) == 0)
{
RTTestSub(g_hTest, "Read/Write");
RTTESTI_CHECK_RC(rc = RTFileOpen(&hFile, "tstFileAio#1.tst",
RTFILE_O_READWRITE | RTFILE_O_OPEN | RTFILE_O_DENY_NONE | RTFILE_O_ASYNC_IO),
VINF_SUCCESS);
if (RT_SUCCESS(rc))
{
tstFileAioTestReadWriteBasic(hFile, false /*fWrite*/, pbTestBuf, TSTFILEAIO_BUFFER_SIZE, 100*_1M, cReqsMax);
RTFileClose(hFile);
}
}
/* Cleanup */
RTFileDelete("tstFileAio#1.tst");
}
else
RTTestSkipped(g_hTest, "rc=%Rrc", rc);
}
/*
* Summary
*/
return RTTestSummaryAndDestroy(g_hTest);
}
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