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tst: fsbench: --empty-cache option

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This commit is contained in:
Bill Zissimopoulos
2022-04-19 10:21:31 +01:00
parent 4b65871747
commit bda0477a79
4 changed files with 124 additions and 7 deletions
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76
tst/fsbench/fsbench.c
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@ -23,6 +23,7 @@
#include <strsafe.h>
#include <tlib/testsuite.h>
static BOOLEAN OptEmptyCache = FALSE;
static ULONG OptFileCount = 1000;
static ULONG OptListCount = 100;
static ULONG OptRdwrFileSize = 4096 * 1024;
@ -398,6 +399,64 @@ static void mmap_tests(void)
TEST(mmap_read_test);
}
static void EmptyCache(const char *name, void (*fn)(void), int v)
{
NTSYSCALLAPI NTSTATUS NTAPI
NtSetSystemInformation(
ULONG SystemInformationClass,
PVOID SystemInformation,
ULONG SystemInformationLength);
if (+1 == v) /* setup */
{
/* flush the file system cache (requires SE_INCREASE_QUOTA_NAME) */
ASSERT(SetSystemFileCacheSize((SIZE_T)-1, (SIZE_T)-1, 0));
/* flush/purge the standby list (requires SE_PROF_SINGLE_PROCESS_NAME) */
ULONG Command;
Command = 3 /*MemoryFlushModifiedList*/;
ASSERT(0 == NtSetSystemInformation(80 /*SystemMemoryListInformation*/, &Command, sizeof Command));
Command = 4 /*MemoryPurgeStandbyList*/;
ASSERT(0 == NtSetSystemInformation(80 /*SystemMemoryListInformation*/, &Command, sizeof Command));
}
else
if (-1 == v) /* teardown */
{
}
}
static DWORD EnablePrivilegesForEmptyCache(VOID)
{
union
{
TOKEN_PRIVILEGES P;
UINT8 B[sizeof(TOKEN_PRIVILEGES) + sizeof(LUID_AND_ATTRIBUTES)];
} Privileges;
HANDLE Token;
Privileges.P.PrivilegeCount = 2;
Privileges.P.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
Privileges.P.Privileges[1].Attributes = SE_PRIVILEGE_ENABLED;
if (!LookupPrivilegeValueW(0, SE_PROF_SINGLE_PROCESS_NAME, &Privileges.P.Privileges[0].Luid) ||
!LookupPrivilegeValueW(0, SE_INCREASE_QUOTA_NAME, &Privileges.P.Privileges[1].Luid))
return GetLastError();
if (!OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES, &Token))
return GetLastError();
if (!AdjustTokenPrivileges(Token, FALSE, &Privileges.P, 0, 0, 0) ||
ERROR_NOT_ALL_ASSIGNED == GetLastError())
{
CloseHandle(Token);
return GetLastError();
}
CloseHandle(Token);
return ERROR_SUCCESS;
}
#define rmarg(argv, argc, argi) \
argc--, \
memmove(argv + argi, argv + argi + 1, (argc - argi) * sizeof(char *)),\
@ -414,7 +473,12 @@ int main(int argc, char *argv[])
const char *a = argv[argi];
if ('-' == a[0])
{
if (0 == strncmp("--files=", a, sizeof "--files=" - 1))
if (0 == strcmp("--empty-cache", a))
{
OptEmptyCache = TRUE;
rmarg(argv, argc, argi);
}
else if (0 == strncmp("--files=", a, sizeof "--files=" - 1))
{
OptFileCount = strtoul(a + sizeof "--files=" - 1, 0, 10);
rmarg(argv, argc, argi);
@ -442,6 +506,16 @@ int main(int argc, char *argv[])
}
}
if (OptEmptyCache)
{
if (0 != EnablePrivilegesForEmptyCache())
{
tlib_printf("ABORT: cannot enable privileges required for empty cache\n");
abort();
}
TESTHOOK(EmptyCache);
}
tlib_run_tests(argc, argv);
return 0;
}