From: abush wang <abushwangs@gmail.com>
To: abushwang via Libc-alpha <libc-alpha@sourceware.org>
Cc: adhemerval.zanella@linaro.org
Subject: [PATCH] stdlib: reorganize stdlib Makefile routines by functionality
Date: Mon, 1 Apr 2024 19:47:29 +0800 [thread overview]
Message-ID: <CAMLoAPZ2YG3y9jdzJRwBxpMzJYV+=7LCfOPvu8Ht3zTBhP-EOQ@mail.gmail.com> (raw)
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This is test:
```
uint64_t getnsecs() {
uint32_t lo, hi;
__asm__ __volatile__ (
"rdtsc" : "=a"(lo), "=d"(hi)
);
return ((uint64_t)hi << 32) | lo;
}
int main() {
const int num_iterations = 1;
uint64_t start, end, total_time = 0;
start = getnsecs();
for (int i = 0; i < num_iterations; i++) {
(void) lrand48();
}
end = getnsecs();
total_time += (end - start);
printf("Average time for lrand48: %lu cycles\n", total_time /
num_iterations);
return 0;
}
```
before:
Average time for lrand48: 21418 cycles
after:
Average time for lrand48: 9892 cycles
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next reply other threads:[~2024-04-01 11:48 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-01 11:47 abush wang [this message]
2024-04-01 13:12 ` [PATCH] stdlib: reorganize stdlib Makefile routines by functionality Florian Weimer
2024-04-01 13:17 ` H.J. Lu
2024-04-01 13:46 ` Adhemerval Zanella Netto
2024-04-02 3:54 ` abush wang
2024-04-08 2:48 ` abush wang
2024-04-02 2:17 ` abush wang
2024-04-02 2:28 ` abush wang
2024-04-02 3:13 ` H.J. Lu
2024-04-02 6:18 ` abush wang
2024-04-02 14:15 ` Adhemerval Zanella Netto
2024-04-03 1:57 ` abush wang
-- strict thread matches above, loose matches on Subject: below --
2024-04-01 11:44 abushwang
2024-04-01 12:03 ` Xi Ruoyao
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