X-Git-Url: https://gerrit.fd.io/r/gitweb?p=csit.git;a=blobdiff_plain;f=resources%2Flibraries%2Fpython%2FQemuUtils.py;h=cfdbc7ffa462bf6c7e0ea5f0f35713db675775ad;hp=15c4e2315acc8c0fd5b36df8b999bf9a0f952afe;hb=b0eaa32dce87ccb8749b227066b26ae9bc66cace;hpb=b037f5f0f010ebe3d1cf49ff4966733897bac814 diff --git a/resources/libraries/python/QemuUtils.py b/resources/libraries/python/QemuUtils.py index 15c4e2315a..cfdbc7ffa4 100644 --- a/resources/libraries/python/QemuUtils.py +++ b/resources/libraries/python/QemuUtils.py @@ -27,7 +27,7 @@ from resources.libraries.python.topology import NodeType class QemuUtils(object): """QEMU utilities.""" - __QEMU_BIN = '/opt/qemu/bin/qemu-system-x86_64' + __QEMU_BIN = '/usr/bin/qemu-system-x86_64' # QEMU Machine Protocol socket __QMP_SOCK = '/tmp/qmp.sock' # QEMU Guest Agent socket @@ -49,10 +49,10 @@ class QemuUtils(object): self._qemu_opt['mem_size'] = 512 # Default huge page mount point, required for Vhost-user interfaces. self._qemu_opt['huge_mnt'] = '/mnt/huge' + # Default do not allocate huge pages. + self._qemu_opt['huge_allocate'] = False # Default image for CSIT virl setup self._qemu_opt['disk_image'] = '/var/lib/vm/vhost-nested.img' - # Affinity of qemu processes - self._qemu_opt['affinity'] = False # VM node info dict self._vm_info = { 'type': NodeType.VM, @@ -114,6 +114,10 @@ class QemuUtils(object): """ self._qemu_opt['huge_mnt'] = huge_mnt + def qemu_set_huge_allocate(self): + """Set flag to allocate more huge pages if needed.""" + self._qemu_opt['huge_allocate'] = True + def qemu_set_disk_image(self, disk_image): """Set disk image. @@ -122,13 +126,44 @@ class QemuUtils(object): """ self._qemu_opt['disk_image'] = disk_image - def qemu_set_affinity(self, mask): - """Set qemu affinity by taskset with cpu mask. + def qemu_set_affinity(self, *host_cpus): + """Set qemu affinity by getting thread PIDs via QMP and taskset to list + of CPU cores. + + :param host_cpus: List of CPU cores. + :type host_cpus: list + """ + qemu_cpus = self._qemu_qmp_exec('query-cpus')['return'] + + if len(qemu_cpus) != len(host_cpus): + logger.debug('Host CPU count {0}, Qemu Thread count {1}'.format( + len(host_cpus), len(qemu_cpus))) + raise ValueError('Host CPU count must match Qemu Thread count') + + for qemu_cpu, host_cpu in zip(qemu_cpus, host_cpus): + cmd = 'taskset -p {0} {1}'.format(hex(1 << int(host_cpu)), + qemu_cpu['thread_id']) + (ret_code, _, stderr) = self._ssh.exec_command_sudo(cmd) + if int(ret_code) != 0: + logger.debug('Set affinity failed {0}'.format(stderr)) + raise RuntimeError('Set affinity failed on {0}'.format( + self._node['host'])) + + def qemu_set_scheduler_policy(self): + """Set scheduler policy to SCHED_RR with priority 1 for all Qemu CPU + processes. - :param mask: Hex CPU mask. - :type mask: str + :raises RuntimeError: Set scheduler policy failed. """ - self._qemu_opt['affinity'] = mask + qemu_cpus = self._qemu_qmp_exec('query-cpus')['return'] + + for qemu_cpu in qemu_cpus: + cmd = 'chrt -r -p 1 {0}'.format(qemu_cpu['thread_id']) + (ret_code, _, stderr) = self._ssh.exec_command_sudo(cmd) + if int(ret_code) != 0: + logger.debug('Set SCHED_RR failed {0}'.format(stderr)) + raise RuntimeError('Set SCHED_RR failed on {0}'.format( + self._node['host'])) def qemu_set_node(self, node): """Set node to run QEMU on. @@ -196,10 +231,10 @@ class QemuUtils(object): '{ \\"execute\\": \\"' + cmd + '\\" }" | sudo -S nc -U ' + \ self.__QMP_SOCK (ret_code, stdout, stderr) = self._ssh.exec_command(qmp_cmd) - if 0 != int(ret_code): + if int(ret_code) != 0: logger.debug('QMP execute failed {0}'.format(stderr)) - raise RuntimeError('QMP execute "{0}" failed on {1}'.format(cmd, - self._node['host'])) + raise RuntimeError('QMP execute "{0}"' + ' failed on {1}'.format(cmd, self._node['host'])) logger.trace(stdout) # Skip capabilities negotiation messages. out_list = stdout.splitlines() @@ -214,10 +249,10 @@ class QemuUtils(object): qga_cmd = 'printf "\xFF" | sudo -S nc ' \ '-q 1 -U ' + self.__QGA_SOCK (ret_code, stdout, stderr) = self._ssh.exec_command(qga_cmd) - if 0 != int(ret_code): + if int(ret_code) != 0: logger.debug('QGA execute failed {0}'.format(stderr)) - raise RuntimeError('QGA execute "{0}" failed on {1}'.format(cmd, - self._node['host'])) + raise RuntimeError('QGA execute "{0}" ' + 'failed on {1}'.format(cmd, self._node['host'])) logger.trace(stdout) if not stdout: return {} @@ -234,10 +269,10 @@ class QemuUtils(object): qga_cmd = 'echo "{ \\"execute\\": \\"' + cmd + '\\" }" | sudo -S nc ' \ '-q 1 -U ' + self.__QGA_SOCK (ret_code, stdout, stderr) = self._ssh.exec_command(qga_cmd) - if 0 != int(ret_code): + if int(ret_code) != 0: logger.debug('QGA execute failed {0}'.format(stderr)) - raise RuntimeError('QGA execute "{0}" failed on {1}'.format(cmd, - self._node['host'])) + raise RuntimeError('QGA execute "{0}"' + ' failed on {1}'.format(cmd, self._node['host'])) logger.trace(stdout) if not stdout: return {} @@ -298,7 +333,7 @@ class QemuUtils(object): else: interface['name'] = if_name - def _huge_page_check(self): + def _huge_page_check(self, allocate=False): """Huge page check.""" huge_mnt = self._qemu_opt.get('huge_mnt') mem_size = self._qemu_opt.get('mem_size') @@ -307,12 +342,37 @@ class QemuUtils(object): regex = re.compile(r'HugePages_Free:\s+(\d+)') match = regex.search(output) huge_free = int(match.group(1)) + regex = re.compile(r'HugePages_Total:\s+(\d+)') + match = regex.search(output) + huge_total = int(match.group(1)) regex = re.compile(r'Hugepagesize:\s+(\d+)') match = regex.search(output) huge_size = int(match.group(1)) + # Check if memory reqested by qemu is available on host if (mem_size * 1024) > (huge_free * huge_size): - raise RuntimeError('Not enough free huge pages {0} kB, required ' - '{1} MB'.format(huge_free * huge_size, mem_size)) + # If we want to allocate hugepage dynamically + if allocate: + mem_needed = abs((huge_free * huge_size) - (mem_size * 1024)) + huge_to_allocate = ((mem_needed / huge_size) * 2) + huge_total + max_map_count = huge_to_allocate*4 + # Increase maximum number of memory map areas a process may have + cmd = 'echo "{0}" | sudo tee /proc/sys/vm/max_map_count'.format( + max_map_count) + (ret_code, _, stderr) = self._ssh.exec_command_sudo(cmd) + # Increase hugepage count + cmd = 'echo "{0}" | sudo tee /proc/sys/vm/nr_hugepages'.format( + huge_to_allocate) + (ret_code, _, stderr) = self._ssh.exec_command_sudo(cmd) + if int(ret_code) != 0: + logger.debug('Mount huge pages failed {0}'.format(stderr)) + raise RuntimeError('Mount huge pages failed on {0}'.format( + self._node['host'])) + # If we do not want to allocate dynamicaly end with error + else: + raise RuntimeError( + 'Not enough free huge pages: {0}, ' + '{1} MB'.format(huge_free, huge_free * huge_size) + ) # Check if huge pages mount point exist has_huge_mnt = False (_, output, _) = self._ssh.exec_command('cat /proc/mounts') @@ -325,6 +385,12 @@ class QemuUtils(object): break # If huge page mount point not exist create one if not has_huge_mnt: + cmd = 'mkdir -p {0}'.format(huge_mnt) + (ret_code, _, stderr) = self._ssh.exec_command_sudo(cmd) + if int(ret_code) != 0: + logger.debug('Create mount dir failed: {0}'.format(stderr)) + raise RuntimeError('Create mount dir failed on {0}'.format( + self._node['host'])) cmd = 'mount -t hugetlbfs -o pagesize=2048k none {0}'.format( huge_mnt) (ret_code, _, stderr) = self._ssh.exec_command_sudo(cmd) @@ -346,26 +412,27 @@ class QemuUtils(object): self._qemu_opt.get('ssh_fwd_port')) # Memory and huge pages mem = '-object memory-backend-file,id=mem,size={0}M,mem-path={1},' \ - 'share=on -m {0} -numa node,memdev=mem -mem-prealloc'.format( - self._qemu_opt.get('mem_size'), self._qemu_opt.get('huge_mnt')) - self._huge_page_check() + 'share=on -m {0} -numa node,memdev=mem'.format( + self._qemu_opt.get('mem_size'), self._qemu_opt.get('huge_mnt')) + + # By default check only if hugepages are availbale. + # If 'huge_allocate' is set to true try to allocate as well. + self._huge_page_check(allocate=self._qemu_opt.get('huge_allocate')) + # Setup QMP via unix socket qmp = '-qmp unix:{0},server,nowait'.format(self.__QMP_SOCK) # Setup serial console serial = '-chardev socket,host=127.0.0.1,port={0},id=gnc0,server,' \ 'nowait -device isa-serial,chardev=gnc0'.format( - self._qemu_opt.get('serial_port')) + self._qemu_opt.get('serial_port')) # Setup QGA via chardev (unix socket) and isa-serial channel qga = '-chardev socket,path=/tmp/qga.sock,server,nowait,id=qga0 ' \ '-device isa-serial,chardev=qga0' # Graphic setup graphic = '-monitor none -display none -vga none' - qbin = 'taskset {0} {1}'.format(self._qemu_opt.get('affinity'), - self.__QEMU_BIN) if self._qemu_opt.get( - 'affinity') else self.__QEMU_BIN # Run QEMU cmd = '{0} {1} {2} {3} {4} -hda {5} {6} {7} {8} {9}'.format( - qbin, self._qemu_opt.get('smp'), mem, ssh_fwd, + self.__QEMU_BIN, self._qemu_opt.get('smp'), mem, ssh_fwd, self._qemu_opt.get('options'), self._qemu_opt.get('disk_image'), qmp, serial, qga, graphic) (ret_code, _, stderr) = self._ssh.exec_command_sudo(cmd, timeout=300) @@ -394,15 +461,18 @@ class QemuUtils(object): out = self._qemu_qmp_exec('system_powerdown') err = out.get('error') if err is not None: - raise RuntimeError('QEMU system powerdown failed on {0}, ' - 'error: {1}'.format(self._node['host'], json.dumps(err))) + raise RuntimeError( + 'QEMU system powerdown failed on {0}, ' + 'error: {1}'.format(self._node['host'], json.dumps(err)) + ) def qemu_system_reset(self): """Reset the system.""" out = self._qemu_qmp_exec('system_reset') err = out.get('error') if err is not None: - raise RuntimeError('QEMU system reset failed on {0}, ' + raise RuntimeError( + 'QEMU system reset failed on {0}, ' 'error: {1}'.format(self._node['host'], json.dumps(err))) def qemu_kill(self): @@ -452,7 +522,8 @@ class QemuUtils(object): return ret.get('status') else: err = out.get('error') - raise RuntimeError('QEMU query-status failed on {0}, ' + raise RuntimeError( + 'QEMU query-status failed on {0}, ' 'error: {1}'.format(self._node['host'], json.dumps(err))) @staticmethod @@ -469,6 +540,6 @@ class QemuUtils(object): ssh.exec_command('sudo -Sn bash {0}/{1}/qemu_build.sh'.format( Constants.REMOTE_FW_DIR, Constants.RESOURCES_LIB_SH), 1000) logger.trace(stdout) - if 0 != int(ret_code): + if int(ret_code) != 0: logger.debug('QEMU build failed {0}'.format(stderr)) raise RuntimeError('QEMU build failed on {0}'.format(node['host']))