blob: 9361d3f61f750c40692daac464604d53d697cd7e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
|
// SPDX-License-Identifier: GPL-2.0
#include "cacheline.h"
#include "../perf.h"
#include <unistd.h>
#ifdef _SC_LEVEL1_DCACHE_LINESIZE
#define cache_line_size(cacheline_sizep) *cacheline_sizep = sysconf(_SC_LEVEL1_DCACHE_LINESIZE)
#else
#include <api/fs/fs.h>
#include "debug.h"
static void cache_line_size(int *cacheline_sizep)
{
if (sysfs__read_int("devices/system/cpu/cpu0/cache/index0/coherency_line_size", cacheline_sizep))
pr_debug("cannot determine cache line size");
}
#endif
int cacheline_size(void)
{
static int size;
if (!size)
cache_line_size(&size);
return size;
}
|
