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vppinfra: fix TSC clock detection on newer intel CPUs

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Change-Id: Iff88c9a0dd1b7401605075221640b269bec12859
Signed-off-by: Damjan Marion <damarion@cisco.com>
This commit is contained in:
Damjan Marion
2016-11-12 11:50:01 +01:00
committed by Dave Wallace
parent 72c390917c
commit c0e939b34c
2 changed files with 6 additions and 1 deletions
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3
vppinfra/vppinfra/cpu.h
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@ -63,7 +63,8 @@ _ (avx, 1, ecx, 28) \
_ (avx2, 7, ebx, 5) \ _ (avx2, 7, ebx, 5) \
_ (avx512f, 7, ebx, 16) \ _ (avx512f, 7, ebx, 16) \
_ (aes, 1, ecx, 25) \ _ (aes, 1, ecx, 25) \
_ (sha, 7, ebx, 29) _ (sha, 7, ebx, 29) \
_ (invariant_tsc, 0x80000007, edx, 8)
static inline int static inline int
clib_get_cpuid (const u32 lev, u32 * eax, u32 * ebx, u32 * ecx, u32 * edx) clib_get_cpuid (const u32 lev, u32 * eax, u32 * ebx, u32 * ecx, u32 * edx)

4
vppinfra/vppinfra/time.c
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@ -38,6 +38,7 @@
#include <vppinfra/os.h> #include <vppinfra/os.h>
#include <vppinfra/time.h> #include <vppinfra/time.h>
#include <vppinfra/format.h> #include <vppinfra/format.h>
#include <vppinfra/cpu.h>
#ifdef CLIB_UNIX #ifdef CLIB_UNIX
@ -143,6 +144,9 @@ os_cpu_clock_frequency (void)
{ {
f64 cpu_freq; f64 cpu_freq;
if (clib_cpu_supports_invariant_tsc ())
return estimate_clock_frequency (1e-3);
/* First try /sys version. */ /* First try /sys version. */
cpu_freq = clock_frequency_from_sys_filesystem (); cpu_freq = clock_frequency_from_sys_filesystem ();
if (cpu_freq != 0) if (cpu_freq != 0)