[PATCH i-g-t] lib: Keep upto half of RAM reserved for test runner

[PATCH i-g-t] lib: Keep upto half of RAM reserved for test runner

[Chris Wilson]

Halve our estimated available RAM for use by the tests to avoid nasty
situations where the test runner may force us into swap.

Rumour has it that the new runner isn't quite so bloated as piglit...

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tomi Sarvela <tomi.p.sarvela@intel.com>
Cc: Petri Latvala <petri.latvala@intel.com>
---
 lib/intel_os.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/lib/intel_os.c b/lib/intel_os.c
index 29a27272e..4037440fd 100644
--- a/lib/intel_os.c
+++ b/lib/intel_os.c
@@ -329,8 +329,11 @@ int __intel_check_memory(uint64_t count, uint64_t size, unsigned mode,
 		  mode & CHECK_SWAP ? " + swap": "");
 
 	total = 0;
-	if (mode & (CHECK_RAM | CHECK_SWAP))
-		total += intel_get_avail_ram_mb();
+	if (mode & (CHECK_RAM | CHECK_SWAP)) {
+		total = intel_get_avail_ram_mb();
+		/* Keep some in reserve for the runner. */
+		total -= min(total / 2, 1000);
+	}
 	if (mode & CHECK_SWAP)
 		total += intel_get_total_swap_mb();
 	total *= 1024 * 1024;
-- 
2.18.0

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