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ntdll: Rewrite the SystemProcessorPerformanceInformation handing to avoid code duplication. 

Also include idle time in kernel time.
This commit is contained in:
Alexandre Julliard 2011-04-15 10:54:28 +02:00
parent c3dc0cfa32
commit cc01c46f41
1 changed files with 23 additions and 72 deletions
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93
dlls/ntdll/nt.c
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@ -1310,25 +1310,6 @@ void fill_cpu_info(void)
cached_sci.Architecture, cached_sci.Level, cached_sci.Revision, cached_sci.FeatureSet);
}
static void fill_in_sppi(SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION *sppi, DWORD64 idle, DWORD64 sys, DWORD64 usr)
{
DWORD64 steal;
sppi->IdleTime.QuadPart = idle * 10000000 / sysconf(_SC_CLK_TCK);
sppi->KernelTime.QuadPart = sys * 10000000 / sysconf(_SC_CLK_TCK);
sppi->UserTime.QuadPart = usr * 10000000 / sysconf(_SC_CLK_TCK);
/* Add 1% from idle time to kernel time, to make .NET happy */
steal = sppi->IdleTime.QuadPart / 100;
sppi->IdleTime.QuadPart -= steal;
sppi->KernelTime.QuadPart += steal;
/* DPC time */
sppi->Reserved1[0].QuadPart = 0;
/* Interrupt time */
sppi->Reserved1[1].QuadPart = 0;
sppi->Reserved2 = 0;
}
/******************************************************************************
* NtQuerySystemInformation [NTDLL.@]
* ZwQuerySystemInformation [NTDLL.@]
@ -1605,66 +1586,36 @@ NTSTATUS WINAPI NtQuerySystemInformation(
FILE *cpuinfo = fopen("/proc/stat", "r");
if (cpuinfo)
{
unsigned long clk_tck = sysconf(_SC_CLK_TCK);
unsigned long usr,nice,sys,idle,remainder[8];
int count;
char name[10];
int i, count;
char name[32];
char line[255];
/* first line is combined usage */
if (fgets(line,255,cpuinfo))
count = sscanf(line, "%s %lu %lu %lu %lu "
"%lu %lu %lu %lu %lu %lu %lu %lu",
name, &usr, &nice, &sys, &idle,
&remainder[0], &remainder[1], &remainder[2],
&remainder[3], &remainder[4], &remainder[5],
&remainder[6], &remainder[7]);
else
count = 0;
/* we set this up in the for older non-smp enabled kernels */
if (count >= 5 && strcmp(name, "cpu") == 0)
while (fgets(line,255,cpuinfo))
{
int i;
for (i = 0; i + 5 < count; ++i)
sys += remainder[i];
usr += nice;
sppi = RtlAllocateHeap(GetProcessHeap(), 0,
sizeof(SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION));
fill_in_sppi(sppi, idle, sys, usr);
cpus = 1;
len = sizeof(SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION);
}
count = sscanf(line, "%s %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu",
name, &usr, &nice, &sys, &idle,
&remainder[0], &remainder[1], &remainder[2], &remainder[3],
&remainder[4], &remainder[5], &remainder[6], &remainder[7]);
do
{
if (fgets(line, 255, cpuinfo))
count = sscanf(line, "%s %lu %lu %lu %lu "
"%lu %lu %lu %lu %lu %lu %lu %lu",
name, &usr, &nice, &sys, &idle,
&remainder[0], &remainder[1], &remainder[2],
&remainder[3], &remainder[4], &remainder[5],
&remainder[6], &remainder[7]);
else
count = 0;
if (count >= 5 && strncmp(name, "cpu", 3)==0)
{
int i;
for (i = 0; i + 5 < count; ++i)
sys += remainder[i];
if (count < 5 || strncmp( name, "cpu", 3 )) break;
for (i = 0; i + 5 < count; ++i) sys += remainder[i];
sys += idle;
usr += nice;
out_cpus --;
if (name[3]=='0') /* first cpu */
fill_in_sppi(sppi, idle, sys, usr);
else /* new cpu */
{
len = sizeof(SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION) * (cpus+1);
sppi = RtlReAllocateHeap(GetProcessHeap(), 0, sppi, len);
fill_in_sppi(sppi + cpus, idle, sys, usr);
cpus++;
}
}
cpus = atoi( name + 3 ) + 1;
if (cpus > out_cpus) break;
len = sizeof(SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION) * cpus;
if (sppi)
sppi = RtlReAllocateHeap( GetProcessHeap(), HEAP_ZERO_MEMORY, sppi, len );
else
break;
} while (out_cpus > 0);
sppi = RtlAllocateHeap( GetProcessHeap(), HEAP_ZERO_MEMORY, len );
sppi[cpus-1].IdleTime.QuadPart = (ULONGLONG)idle * 10000000 / clk_tck;
sppi[cpus-1].KernelTime.QuadPart = (ULONGLONG)sys * 10000000 / clk_tck;
sppi[cpus-1].UserTime.QuadPart = (ULONGLONG)usr * 10000000 / clk_tck;
}
fclose(cpuinfo);
}
}