Hello, I wonder if you have a maximum number of vcpus set on your host system. Otherwise, I can't think of any specific limitation to creating vcpus.
Cheers, Jason On Tue, May 11, 2021 at 2:36 AM Liyichao <liyic...@huawei.com> wrote: > Hi Jason: > > > > I use strace to follow the call stack, I find that the ioctl() > with KVM_CREATE_VCPU returned EEXIST errno, this means the vCPU exist. > > > > ioctl(5, KVM_CREATE_VCPU, 2) = -1 EEXIST (File > exists) > > > > > > *发件人:* Liyichao > *发送时间:* 2021年5月11日 12:54 > *收件人:* 'Jason Lowe-Power' <ja...@lowepower.com>; gem5 users mailing list < > gem5-users@gem5.org> > *主题:* 答复: [gem5-users] Fail to bootup with KVM in se.py on X86 arch > > > > Hi Jason: > > I have add a DPRINTF in line 559 of vm.cc , it showed “ 0: > system.kvm_vm: *************debug vcpuID is 0” > > > > Any KVM use limitations in X86? > > > > > > gem5 version 21.0.0.0 > > gem5 compiled May 11 2021 01:04:20 > > gem5 started May 11 2021 01:09:26 > > gem5 executing on ubuntu, pid 53534 > > command line: ./build/X86/gem5.opt --debug-flags=Kvm configs/example/se.py > --cpu-type=X86KvmCPU --cpu-clock=2.6GHz --sys-clock=2.6GHz --caches > --l1d_size=64kB --l1i_size=64kB --l2cache --l2_size=32MB --mem-size=32GB > --num-cpus=1 -I 5000 -c ./test > > > > warn: membus.slave is deprecated. `slave` is now called `cpu_side_ports` > > warn: tol2bus.master is deprecated. `master` is now called `mem_side_ports` > > warn: membus.slave is deprecated. `slave` is now called `cpu_side_ports` > > warn: tol2bus.slave is deprecated. `slave` is now called `cpu_side_ports` > > warn: tol2bus.slave is deprecated. `slave` is now called `cpu_side_ports` > > warn: tol2bus.slave is deprecated. `slave` is now called `cpu_side_ports` > > warn: tol2bus.slave is deprecated. `slave` is now called `cpu_side_ports` > > warn: membus.master is deprecated. `master` is now called `mem_side_ports` > > warn: membus.master is deprecated. `master` is now called `mem_side_ports` > > warn: membus.slave is deprecated. `slave` is now called `cpu_side_ports` > > Global frequency set at 1000000000000 ticks per second > > warn: DRAM device capacity (8192 Mbytes) does not match the address range > assigned (32768 Mbytes) > > 0: system.cpu: vcpuID is 0 > > 0: system.remote_gdb: listening for remote gdb on port 7000 > > 0: system.cpu: ActivateContext 0 > > **** REAL SIMULATION **** > > 0: system.kvm_vm: Mapping 1 memory region(s) > > 0: system.kvm_vm: Mapping region: 0x0x7f0b007b7000 -> 0x0 [size: > 0x800000000] > > 0: system.kvm_vm: vmFD is 5, p1 is 140724538190576 > > 0: system.cpu: charlie, vcpuID is 0 > > 0: system.kvm_vm: vmFD is 5, p1 is 0 > > 0: system.kvm_vm: *************debug vcpuID is 0 > > panic: KVM: Failed to create virtual CPU > > Memory Usage: 33838804 KBytes > > Program aborted at tick 0 > > --- BEGIN LIBC BACKTRACE --- > > ./build/X86/gem5.opt(_Z15print_backtracev+0x2c)[0x5622a4c15f8c] > > ./build/X86/gem5.opt(_Z12abortHandleri+0x4a)[0x5622a4c30b6a] > > /lib/x86_64-linux-gnu/libpthread.so.0(+0x12980)[0x7f1305ea6980] > > /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7)[0x7f1304430fb7] > > /lib/x86_64-linux-gnu/libc.so.6(abort+0x141)[0x7f1304432921] > > ./build/X86/gem5.opt(+0x6e5cef)[0x5622a3f20cef] > > ./build/X86/gem5.opt(_ZN5KvmVM10createVCPUEl+0x9ff)[0x5622a4953b8f] > > ./build/X86/gem5.opt(_ZN10BaseKvmCPU7startupEv+0x9e)[0x5622a494bc8e] > > ./build/X86/gem5.opt(_ZN9X86KvmCPU7startupEv+0x9)[0x5622a4969509] > > > ------------------------------ > > > > *发件人:* Jason Lowe-Power [mailto:ja...@lowepower.com <ja...@lowepower.com>] > > *发送时间:* 2021年5月10日 23:56 > *收件人:* gem5 users mailing list <gem5-users@gem5.org> > *抄送:* Liyichao <liyic...@huawei.com> > *主题:* Re: [gem5-users] Fail to bootup with KVM in se.py on X86 arch > > > > Hmm, I don't immediately know what's going wrong. I would extend the panic > on line 559 of vm.cc to also print the error code number so you can look it > up. I believe you can use `errno` like normal after calling `ioctl`. For > instance, you could add `strerror(errno)` to the panic. > > > > Cheers, > > Jason > > > > > > On Mon, May 10, 2021 at 12:49 AM Liyichao via gem5-users < > gem5-users@gem5.org> wrote: > > Hi All: > > I use KVM CPU in se mode on X86 arch, but it showed a panic “KVM: > Failed to create virtual CPU”. > > > > > > My host is X86 server of Intel 6148 and it can support kvm: > > lsmod |grep kvm > > kvm_intel 172032 0 > > kvm 548864 1 kvm_intel > > irqbypass 16384 1 kvm > > > > ll /dev/kvm > > crwxrwxrwx 1 root root 10, 232 Feb 16 20:40 /dev/kvm > > > > My GEM5 version is master(v21.0.0.0), > ea7d012c00e5555857ef999b88a8ec2bde801a1f > > > > > > ./build/X86/gem5.opt configs/example/se.py --cpu-type=X86KvmCPU > --cpu-clock=2.6GHz --sys-clock=2.6GHz --caches --l1d_size=64kB > --l1i_size=64kB --l2cache --l2_size=32MB --mem-size=32GB --num-cpus=1 -I > 5000 -c "./test" > > gem5 Simulator System. http://gem5.org > > gem5 is copyrighted software; use the --copyright option for details. > > > > gem5 version 21.0.0.0 > > gem5 compiled May 10 2021 03:39:51 > > gem5 started May 10 2021 03:57:48 > > gem5 executing on ubuntu, pid 112188 > > command line: ./build/X86/gem5.opt configs/example/se.py > --cpu-type=X86KvmCPU --cpu-clock=2.6GHz --sys-clock=2.6GHz --caches > --l1d_size=64kB --l1i_size=64kB --l2cache --l2_size=32MB --mem-size=32GB > --num-cpus=1 -I 5000 -c ./test > > > > warn: membus.slave is deprecated. `slave` is now called `cpu_side_ports` > > warn: tol2bus.master is deprecated. `master` is now called `mem_side_ports` > > warn: membus.slave is deprecated. `slave` is now called `cpu_side_ports` > > warn: tol2bus.slave is deprecated. `slave` is now called `cpu_side_ports` > > warn: tol2bus.slave is deprecated. `slave` is now called `cpu_side_ports` > > warn: tol2bus.slave is deprecated. `slave` is now called `cpu_side_ports` > > warn: tol2bus.slave is deprecated. `slave` is now called `cpu_side_ports` > > warn: membus.master is deprecated. `master` is now called `mem_side_ports` > > warn: membus.master is deprecated. `master` is now called `mem_side_ports` > > warn: membus.slave is deprecated. `slave` is now called `cpu_side_ports` > > Global frequency set at 1000000000000 ticks per second > > warn: DRAM device capacity (8192 Mbytes) does not match the address range > assigned (32768 Mbytes) > > 0: system.remote_gdb: listening for remote gdb on port 7000 > > **** REAL SIMULATION **** > > panic: KVM: Failed to create virtual CPU > > _______________________________________________ > gem5-users mailing list -- gem5-users@gem5.org > To unsubscribe send an email to gem5-users-le...@gem5.org > %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s > >
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