projects / thirdparty / squid.git / blame
| Commit | Line | Data |
|---|---|---|
| f0ba1a9b | 1 | /* |
| bde978a6 | 2 | * Copyright (C) 1996-2015 The Squid Software Foundation and contributors |
| f0ba1a9b AJ |
3 | * |
| 4 | * Squid software is distributed under GPLv2+ license and includes | |
| 5 | * contributions from numerous individuals and organizations. | |
| 6 | * Please see the COPYING and CONTRIBUTORS files for details. | |
| 7 | */ | |
| 8 | ||
| 25f98340 AJ |
9 | #ifndef _PROFILER_GET_TICK_H_ |
| 10 | #define _PROFILER_GET_TICK_H_ | |
| 11 | ||
| 25f98340 AJ |
12 | #if USE_XPROF_STATS |
| 13 | ||
| 5e44eea8 AJ |
14 | /* |
| 15 | * Ensure that any changes here are synchronised with SQUID_CHECK_FUNCTIONAL_CPU_PROFILER | |
| 16 | */ | |
| 17 | ||
| 25f98340 AJ |
18 | #if !_SQUID_SOLARIS_ |
| 19 | typedef int64_t hrtime_t; | |
| 20 | #endif | |
| 21 | ||
| 22 | #if defined(__GNUC__) && ( defined(__i386) || defined(__i386__) ) | |
| 23 | static inline hrtime_t | |
| 24 | get_tick(void) | |
| 25 | { | |
| 26 | hrtime_t regs; | |
| 27 | ||
| f53969cc | 28 | asm volatile ("rdtsc":"=A" (regs)); |
| 25f98340 AJ |
29 | return regs; |
| 30 | /* We need return value, we rely on CC to optimise out needless subf calls */ | |
| 31 | /* Note that "rdtsc" is relatively slow OP and stalls the CPU pipes, so use it wisely */ | |
| 32 | } | |
| 33 | ||
| 34 | #elif defined(__GNUC__) && ( defined(__x86_64) || defined(__x86_64__) ) | |
| 35 | static inline hrtime_t | |
| 36 | get_tick(void) | |
| 37 | { | |
| 38 | uint32_t lo, hi; | |
| 39 | // Based on an example in Wikipedia | |
| 40 | /* We cannot use "=A", since this would use %rax on x86_64 */ | |
| f53969cc | 41 | asm volatile ("rdtsc" : "=a" (lo), "=d" (hi)); |
| 25f98340 AJ |
42 | return (hrtime_t)hi << 32 | lo; |
| 43 | } | |
| 44 | ||
| 45 | #elif defined(__GNUC__) && defined(__alpha) | |
| 46 | static inline hrtime_t | |
| 47 | get_tick(void) | |
| 48 | { | |
| 49 | hrtime_t regs; | |
| 50 | ||
| f53969cc | 51 | asm volatile ("rpcc %0" : "=r" (regs)); |
| 25f98340 AJ |
52 | return regs; |
| 53 | } | |
| 54 | ||
| 55 | #elif defined(_M_IX86) && defined(_MSC_VER) /* x86 platform on Microsoft C Compiler ONLY */ | |
| 56 | static __inline hrtime_t | |
| 57 | get_tick(void) | |
| 58 | { | |
| 59 | hrtime_t regs; | |
| 60 | ||
| 61 | __asm { | |
| 62 | cpuid | |
| 63 | rdtsc | |
| 64 | mov eax,DWORD PTR regs[0] | |
| 65 | mov edx,DWORD PTR regs[4] | |
| 66 | } | |
| 67 | return regs; | |
| 68 | } | |
| 69 | ||
| 70 | #else | |
| 71 | /* This CPU is unsupported. Short-circuit, no profiling here */ | |
| 5e44eea8 AJ |
72 | // #error for configure tests to prevent library construction |
| 73 | #error This CPU is unsupported. No profiling available here. | |
| 25f98340 AJ |
74 | #endif |
| 75 | ||
| 76 | #endif /* USE_XPROF_STATS */ | |
| 77 | #endif /* _PROFILING_H_ */ | |
| f53969cc | 78 |