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Side by Side Diff: client/tests/kvm/tests/ksm_overcommit.py

Issue 3541002: Revert "Merge remote branch 'cros/upstream' into tempbranch2" (Closed) Base URL: ssh://git@gitrw.chromium.org:9222/autotest.git
Patch Set: Created 10 years, 2 months ago
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1 import logging, time, random, string, math, os, tempfile 1 import logging, time, random, string, math, os, tempfile
2 from autotest_lib.client.common_lib import error 2 from autotest_lib.client.common_lib import error
3 from autotest_lib.client.bin import utils 3 from autotest_lib.client.bin import utils
4 import kvm_subprocess, kvm_test_utils, kvm_utils, kvm_preprocessing 4 import kvm_subprocess, kvm_test_utils, kvm_utils, kvm_preprocessing
5 5
6 6
7 def run_ksm_overcommit(test, params, env): 7 def run_ksm_overcommit(test, params, env):
8 """ 8 """
9 Test how KSM (Kernel Shared Memory) act when more than physical memory is 9 Test how KSM (Kernel Shared Memory) act when more than physical memory is
10 used. In second part we also test how KVM handles a situation when the host 10 used. In second part we also test how KVM handles a situation when the host
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365 vm.destroy(gracefully = False) 365 vm.destroy(gracefully = False)
366 366
367 367
368 # Main test code 368 # Main test code
369 logging.info("Starting phase 0: Initialization") 369 logging.info("Starting phase 0: Initialization")
370 new_ksm = False 370 new_ksm = False
371 if (os.path.exists("/sys/kernel/mm/ksm/run")): 371 if (os.path.exists("/sys/kernel/mm/ksm/run")):
372 utils.run("echo 50 > /sys/kernel/mm/ksm/sleep_millisecs") 372 utils.run("echo 50 > /sys/kernel/mm/ksm/sleep_millisecs")
373 utils.run("echo 5000 > /sys/kernel/mm/ksm/pages_to_scan") 373 utils.run("echo 5000 > /sys/kernel/mm/ksm/pages_to_scan")
374 utils.run("echo 1 > /sys/kernel/mm/ksm/run") 374 utils.run("echo 1 > /sys/kernel/mm/ksm/run")
375
376 if (os.path.exists("/sys/kernel/mm/transparent_hugepage/enabled")):
377 utils.run("echo 'never' > /sys/kernel/mm/transparent_hugepage/enable d ")
378 if (os.path.exists("/sys/kernel/mm/redhat_transparent_hugepage/enabled") ):
379 utils.run("echo 'never' > /sys/kernel/mm/redhat_transparent_hugepage /enabled ")
380 new_ksm = True 375 new_ksm = True
381 else: 376 else:
382 try: 377 try:
383 utils.run("modprobe ksm") 378 utils.run("modprobe ksm")
384 utils.run("ksmctl start 5000 100") 379 utils.run("ksmctl start 5000 100")
385 except error.CmdError, e: 380 except error.CmdError, e:
386 raise error.TestFail("Failed to load KSM: %s" % e) 381 raise error.TestFail("Failed to load KSM: %s" % e)
387 382
388 # host_reserve: mem reserve kept for the host system to run 383 # host_reserve: mem reserve kept for the host system to run
389 host_reserve = int(params.get("ksm_host_reserve", -1)) 384 host_reserve = int(params.get("ksm_host_reserve", -1))
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614 if params['ksm_mode'] == "parallel": 609 if params['ksm_mode'] == "parallel":
615 logging.info("Starting KSM test parallel mode") 610 logging.info("Starting KSM test parallel mode")
616 split_parallel() 611 split_parallel()
617 logging.info("KSM test parallel mode: PASS") 612 logging.info("KSM test parallel mode: PASS")
618 elif params['ksm_mode'] == "serial": 613 elif params['ksm_mode'] == "serial":
619 logging.info("Starting KSM test serial mode") 614 logging.info("Starting KSM test serial mode")
620 initialize_guests() 615 initialize_guests()
621 separate_first_guest() 616 separate_first_guest()
622 split_guest() 617 split_guest()
623 logging.info("KSM test serial mode: PASS") 618 logging.info("KSM test serial mode: PASS")
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