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