* [KVM_AUTOTEST][PATCH] Add support for newer (sysfs) ksm interface
@ 2010-06-14 13:35 Lukas Doktor
2010-06-14 13:35 ` [PATCH] Adds " Lukas Doktor
0 siblings, 1 reply; 2+ messages in thread
From: Lukas Doktor @ 2010-06-14 13:35 UTC (permalink / raw
To: ldoktor; +Cc: jzupka, kvm, autotest, jasowang
This patch adds support for newer sysfs interface used since Fedora 12.
^ permalink raw reply [flat|nested] 2+ messages in thread
* [PATCH] Adds support for newer (sysfs) ksm interface
2010-06-14 13:35 [KVM_AUTOTEST][PATCH] Add support for newer (sysfs) ksm interface Lukas Doktor
@ 2010-06-14 13:35 ` Lukas Doktor
0 siblings, 0 replies; 2+ messages in thread
From: Lukas Doktor @ 2010-06-14 13:35 UTC (permalink / raw
To: ldoktor; +Cc: jzupka, kvm, autotest, jasowang
Signed-off-by: Lukas Doktor <ldoktor@redhat.com>
Signed-off-by: Jiri Zupka <jzupka@redhat.com>
---
client/tests/kvm/tests/ksm_overcommit.py | 47 ++++++++++++++++++++++++-----
client/tests/kvm/tests_base.cfg.sample | 2 -
2 files changed, 39 insertions(+), 10 deletions(-)
diff --git a/client/tests/kvm/tests/ksm_overcommit.py b/client/tests/kvm/tests/ksm_overcommit.py
index 2b791f1..a19b815 100644
--- a/client/tests/kvm/tests/ksm_overcommit.py
+++ b/client/tests/kvm/tests/ksm_overcommit.py
@@ -59,6 +59,18 @@ def run_ksm_overcommit(test, params, env):
return (match, data)
+ def get_ksmstat():
+ """
+ Return sharing memory by ksm in MB
+
+ @return: memory in MB
+ """
+ f = open('/sys/kernel/mm/ksm/pages_sharing')
+ ksm_pages = int(f.read())
+ f.close()
+ return ((ksm_pages*4096)/1e6)
+
+
def initialize_guests():
"""
Initialize guests (fill their memories with specified patterns).
@@ -88,21 +100,25 @@ def run_ksm_overcommit(test, params, env):
# Let allocator.py do its job
# (until shared mem reaches expected value)
shm = 0
- i = 0
+ j = 0
logging.debug("Target shared meminfo for guest %s: %s", vm.name,
ksm_size)
- while shm < ksm_size:
- if i > 64:
+ while ((new_ksm and (shm < (ksm_size*(i+1)))) or
+ (not new_ksm and (shm < (ksm_size)))):
+ if j > 64:
logging.debug(kvm_test_utils.get_memory_info(lvms))
raise error.TestError("SHM didn't merge the memory until "
"the DL on guest: %s" % vm.name)
st = ksm_size / 200 * perf_ratio
logging.debug("Waiting %ds before proceeding..." % st)
time.sleep(st)
- shm = vm.get_shared_meminfo()
+ if (new_ksm):
+ shm = get_ksmstat()
+ else:
+ shm = vm.get_shared_meminfo()
logging.debug("Shared meminfo for guest %s after "
- "iteration %s: %s", vm.name, i, shm)
- i += 1
+ "iteration %s: %s", vm.name, j, shm)
+ j += 1
# Keep some reserve
rt = ksm_size / 200 * perf_ratio
@@ -263,14 +279,17 @@ def run_ksm_overcommit(test, params, env):
shm = 0
i = 0
logging.debug("Target shared memory size: %s", ksm_size)
- while shm < ksm_size:
+ while (shm < ksm_size):
if i > 64:
logging.debug(kvm_test_utils.get_memory_info(lvms))
raise error.TestError("SHM didn't merge the memory until DL")
wt = ksm_size / 200 * perf_ratio
logging.debug("Waiting %ds before proceed...", wt)
time.sleep(wt)
- shm = vm.get_shared_meminfo()
+ if (new_ksm):
+ shm = get_ksmstat()
+ else:
+ shm = vm.get_shared_meminfo()
logging.debug("Shared meminfo after attempt %s: %s", i, shm)
i += 1
@@ -348,6 +367,18 @@ def run_ksm_overcommit(test, params, env):
# Main test code
logging.info("Starting phase 0: Initialization")
+ new_ksm = False
+ if (os.path.exists("/sys/kernel/mm/ksm/run")):
+ utils.run("echo 50 > /sys/kernel/mm/ksm/sleep_millisecs")
+ utils.run("echo 5000 > /sys/kernel/mm/ksm/pages_to_scan")
+ utils.run("echo 1 > /sys/kernel/mm/ksm/run")
+ new_ksm = True
+ else:
+ try:
+ utils.run("modprobe ksm")
+ utils.run("ksmctl start 5000 100")
+ except error.CmdError, e:
+ raise error.TestFail("Failed to load KSM: %s" % e)
# host_reserve: mem reserve kept for the host system to run
host_reserve = int(params.get("ksm_host_reserve", -1))
diff --git a/client/tests/kvm/tests_base.cfg.sample b/client/tests/kvm/tests_base.cfg.sample
index ab8922b..b377eeb 100644
--- a/client/tests/kvm/tests_base.cfg.sample
+++ b/client/tests/kvm/tests_base.cfg.sample
@@ -315,8 +315,6 @@ variants:
catch_uuid_cmd = dmidecode | awk -F: '/UUID/ {print $2}'
- ksm_overcommit:
- pre_command = "[ -e /dev/ksm ] && true || modprobe ksm && ksmctl start 5000 50"
- pre_command_critical = yes
# Don't preprocess any vms as we need to change its params
vms = ''
image_snapshot = yes
--
1.6.6.1
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