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lib: Check required number of surfaces against VFS file limits

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If we want to create more file handles than VFS supports (itself often a
memory limited value), report that we can not create that many objects
via intel_require_memory().

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2016-02-29 15:33:26 +00:00
parent a508fc8622
commit 925e5e1cae
1 changed files with 21 additions and 2 deletions
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23
lib/intel_os.c
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@ -192,6 +192,20 @@ intel_get_total_swap_mb(void)
return retval / (1024*1024);
}
static uint64_t vfs_file_max(void)
{
static long long unsigned max;
if (max == 0) {
FILE *file = fopen("/proc/sys/fs/file-max", "r");
max = 80000;
if (file) {
igt_assert(fscanf(file, "%llu", &max) == 1);
fclose(file);
}
}
return max;
}
int __intel_check_memory(uint64_t count, uint64_t size, unsigned mode,
uint64_t *out_required, uint64_t *out_total)
{
@ -221,6 +235,9 @@ int __intel_check_memory(uint64_t count, uint64_t size, unsigned mode,
if (out_total)
*out_total = total;
if (count > vfs_file_max())
return false;
return required < total;
}
@ -253,11 +270,13 @@ void intel_require_memory(uint64_t count, uint64_t size, unsigned mode)
igt_skip_on_f(!__intel_check_memory(count, size, mode,
&required, &total),
"Estimated that we need %'llu MiB for the test, but only have %'llu MiB available (%s%s)\n",
"Estimated that we need %'llu objects and %'llu MiB for the test, but only have %'llu MiB available (%s%s) and a maximum of %'llu objects\n",
(long long)count,
(long long)((required + ((1<<20) - 1)) >> 20),
(long long)(total >> 20),
mode & (CHECK_RAM | CHECK_SWAP) ? "RAM" : "",
mode & CHECK_SWAP ? " + swap": "");
mode & CHECK_SWAP ? " + swap": "",
(long long)vfs_file_max());
igt_skip_on_simulation();
}