From 366140a6d53155134020a4b128c73df1d4752f2a Mon Sep 17 00:00:00 2001 From: Alberto Bertogli Date: Mon, 13 Jul 2009 14:23:51 -0300 Subject: [PATCH 33/74] tests/stress: Make the failure probabilities a bit random This change makes the probabilities of the points of failure random within a range, so the result combination of failures in a long run will vary more, increasing code coverage. Signed-off-by: Alberto Bertogli --- tests/stress/jiostress | 21 ++++++++++++++++----- 1 files changed, 16 insertions(+), 5 deletions(-) diff --git a/tests/stress/jiostress b/tests/stress/jiostress index e492670..a6f816b 100755 --- a/tests/stress/jiostress +++ b/tests/stress/jiostress @@ -37,6 +37,9 @@ def randfrange(maxend, maxsize): size = random.randint(0, (maxend - 1) - start) % maxsize return start, start + size +def randfloat(min, max): + return min + random.random() % (max - min) + class ConsistencyError (Exception): pass @@ -162,11 +165,19 @@ class Stresser: return r def fiu_enable(self): - if self.use_fi: - fiu.enable_random('jio/*', probability = 0.001) - fiu.enable_random('linux/*', probability = 0.01) - fiu.enable_random('posix/*', probability = 0.01) - fiu.enable_random('libc/mm/*', probability = 0.003) + if not self.use_fi: + return + + # To improve code coverage, we randomize the probability each + # time we enable failure points + fiu.enable_random('jio/*', + probability = randfloat(0.0005, 0.005)) + fiu.enable_random('linux/*', + probability = randfloat(0.005, 0.03)) + fiu.enable_random('posix/*', + probability = randfloat(0.005, 0.03)) + fiu.enable_random('libc/mm/*', + probability = randfloat(0.003, 0.007)) def fiu_disable(self): if self.use_fi: -- 1.6.2.2.646.gb214