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Code Issues Releases Wiki Activity

Added cpu_msrinfo() function and implemented a few test info entries

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git-svn-id: https://svn.code.sf.net/p/libcpuid/code/HEAD/libcpuid@71 3b4be424-7ac5-41d7-8526-f4ddcb85d872
This commit is contained in:
Veselin Georgiev 2009-09-30 17:20:52 +00:00
parent 0bd7a6d83f
commit e4920d79b0
3 changed files with 72 additions and 28 deletions
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6
cpuid_tool/cpuid_tool.c
View file

@ -317,7 +317,6 @@ static void print_info(output_data_switch query, struct cpu_raw_data_t* raw,
{
int i;
struct msr_driver_t* handle;
uint64_t value;
switch (query) {
case NEED_CPUID_PRESENT:
fprintf(fout, "%d\n", cpuid_present());
@ -410,8 +409,9 @@ static void print_info(output_data_switch query, struct cpu_raw_data_t* raw,
if ((handle = cpu_msr_driver_open()) == NULL) {
fprintf(fout, "Cannot open MSR driver: %s\n", cpuid_error());
} else {
cpu_rdmsr(handle, 0x10, &value);
fprintf(fout, "%I64d\n", value);
fprintf(fout, "mperf = %d\n", cpu_msrinfo(handle, INFO_MPERF));
fprintf(fout, "aperf = %d\n", cpu_msrinfo(handle, INFO_APERF));
fprintf(fout, "cpu:fsb = %.1f\n", cpu_msrinfo(handle, INFO_CUR_MULTIPLIER) / 100.0f);
cpu_msr_driver_close(handle);
}
break;

32
libcpuid/libcpuid.h
View file

@ -741,6 +741,38 @@ struct msr_driver_t* cpu_msr_driver_open(void);
*/
int cpu_rdmsr(struct msr_driver_t* handle, int msr_index, uint64_t* result);
typedef enum {
INFO_MPERF, /*!< Maximum performance frequency clock. This
is a counter, which increments as a
proportion of the actual processor speed */
INFO_APERF, /*!< Actual performance frequency clock. This
accumulates the core clock counts when the
core is active. */
INFO_CUR_MULTIPLIER, /*!< Current CPU:FSB ratio, multiplied by 100.
e.g., a CPU:FSB value of 18.5 reads as
1850. */
INFO_MAX_MULTIPLIER, /*!< Maxumum CPU:FSB ratio for this CPU,
multiplied by 100 */
INFO_TEMPERATURE, /*!< The current core temperature in Celsius */
INFO_THROTTLING, /*!< 1 if the current logical processor is
throttling. 0 if it is running normally. */
} cpu_msrinfo_request_t;
/**
* @brief Reads extended CPU information from Model-Specific Registers.
* @param handle - a handle to an open MSR driver, @see cpu_msr_driver_open
* @param which - which info field should be returned. A list of
* available information entities is listed in the
* cpu_msrinfo_request_t enum.
* @retval - if the requested information is available for the current
* processor model, the respective value is returned.
* if no information is available, or the CPU doesn't support
* the query, the special value CPU_INVALID_VALUE is returned
*/
int cpu_msrinfo(struct msr_driver_t* handle, cpu_msrinfo_request_t which);
#define CPU_INVALID_VALUE 0x3fffffff
/**
* @brief Closes an open MSR driver
*

62
libcpuid/rdmsr.c
View file

@ -215,31 +215,7 @@ static int load_driver(struct msr_driver_t* drv)
debugf(1, "Create driver service failed: %d\n", dwLastError);
break;
}
} /*else {
switch(getImageType(lpszDriverFilePath)){
case IMAGE_FILE_MACHINE_AMD64:
if(!isRunning_x64()){
if(!DeleteFile(lpszDriverFilePath)){
addLastErrorMessageMsgEx(g_hLogEdit, __TEXT("Error deleting driver file(due to binary incompatibility):"), GetLastError());
goto clean_up;
}
if(!extractDriver(lpszDriverFilePath))
goto clean_up;
}
break;
case IMAGE_FILE_MACHINE_I386:
if(isRunning_x64()){
if(!DeleteFile(lpszDriverFilePath)){
addLastErrorMessageMsgEx(g_hLogEdit, __TEXT("Error deleting driver file(due to binary incompatibility):"), GetLastError());
goto clean_up;
}
if(!extractDriver(lpszDriverFilePath))
goto clean_up;
}
break;
}
}*/
}
if(drv->scDriver != NULL){
if(StartService(drv->scDriver, 0, NULL)){
if(!wait_for_service_state(drv->scDriver, SERVICE_RUNNING, &srvStatus)){
@ -312,6 +288,7 @@ int cpu_rdmsr(struct msr_driver_t* driver, int msr_index, uint64_t* result)
int cpu_msr_driver_close(struct msr_driver_t* drv)
{
SERVICE_STATUS srvStatus = {0};
if (drv == NULL) return 0;
if(drv->scDriver != NULL){
if (drv->hhDriver) CancelIo(drv->hhDriver);
if(drv->ovl.hEvent != NULL)
@ -328,4 +305,39 @@ int cpu_msr_driver_close(struct msr_driver_t* drv)
return 0;
}
int cpu_msrinfo(struct msr_driver_t* handle, cpu_msrinfo_request_t which)
{
uint64_t r;
int err;
if (handle == NULL)
return set_error(ERR_HANDLE);
switch (which) {
case INFO_MPERF:
{
err = cpu_rdmsr(handle, 0xe7, &r);
if (err) return CPU_INVALID_VALUE;
return (int) (r & 0x7fffffff);
}
case INFO_APERF:
{
err = cpu_rdmsr(handle, 0xe8, &r);
if (err) return CPU_INVALID_VALUE;
return (int) (r & 0x7fffffff);
}
case INFO_CUR_MULTIPLIER:
{
err = cpu_rdmsr(handle, 0x2a, &r);
if (err) return CPU_INVALID_VALUE;
return (int) ((r >> 22) & 0x3f) * 100;
}
case INFO_MAX_MULTIPLIER:
case INFO_TEMPERATURE:
case INFO_THROTTLING:
default:
return CPU_INVALID_VALUE;
}
}
#endif /* _WIN32 */