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linux: Flush page/buffer cache before querying available memory

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Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2014-07-21 16:15:24 +01:00
parent 784b77257b
commit 70e6ed92ab
1 changed files with 8 additions and 1 deletions
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9
lib/intel_os.c
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@ -98,7 +98,14 @@ intel_get_avail_ram_mb(void)
#ifdef HAVE_STRUCT_SYSINFO_TOTALRAM /* Linux */ #ifdef HAVE_STRUCT_SYSINFO_TOTALRAM /* Linux */
struct sysinfo sysinf; struct sysinfo sysinf;
int ret; int fd, ret;
fd = open("/proc/sys/vm/drop_caches", O_RDWR);
if (fd != -1) {
ret = write(fd, "3", 2);
close(fd);
(void)ret;
}
ret = sysinfo(&sysinf); ret = sysinfo(&sysinf);
assert(ret == 0); assert(ret == 0);