utmapp
The UTM(JIT) cannot be set to '-accel tcg,tb-size=256,split-wx=off', otherwise it will crash?
Describe the issue After setting the UTM qemu runtime parameters to '-accel tcg,tb-size=256,split-wx=off', a crash will occur： qemu-i386-softmmu: -accel tcg,tb-size=256,split-wx=off: allocate 268435456 bytes for jit buffer: Invalid argument.
Configuration (required)
- UTM Version: UTM 4.5.3
- OS Version: iOS 16.2
- Device Model: iPhone 14 pro
- Is it jailbroken (name jailbreak used)? no
- How did you install UTM? Compiled and run through Xcode
Crash log 2024-08-28 10:06:31.834004+0800 UTM[7008:2790562] [QEMULogging(0x280180a40)] Launching: qemu-system-i386 -L /private/var/containers/Bundle/Application/87791EB4-B539-47AF-92C5-F90CA85A14B2/UTM.app/qemu -S -spice unix=on,addr=76D18910-E5B6-4859-8845-3DB263A94ABA.spice,disable-ticketing=on,image-compression=off,playback-compression=off,streaming-video=off,gl=off -chardev spiceport,name=org.qemu.monitor.qmp.0,id=org.qemu.monitor.qmp -mon chardev=org.qemu.monitor.qmp,mode=control -nodefaults -vga none -device rtl8139,mac=C2:12:D2:8C:9C:29,netdev=net0 -netdev user,id=net0 -device qxl-vga -smp cpus=4,sockets=1,cores=4,threads=1 -machine pc,vmport=off,hpet=off -accel tcg,tb-size=256,split-wx=off -global PIIX4_PM.disable_s3=1 -global ICH9-LPC.disable_s3=1 -m 1024 -audiodev spice,id=audio0 -device AC97,audiodev=audio0 -usb -device usb-tablet,bus=usb-bus.0 -device usb-mouse,bus=usb-bus.0 -device usb-kbd,bus=usb-bus.0 -device ich9-usb-ehci1,id=usb-controller-0 -device ich9-usb-uhci1,masterbus=usb-controller-0.0,firstport=0,multifunction=on -device ich9-usb-uhci2,masterbus=usb-controller-0.0,firstport=2,multifunction=on -device ich9-usb-uhci3,masterbus=usb-controller-0.0,firstport=4,multifunction=on -chardev spicevmc,name=usbredir,id=usbredirchardev0 -device usb-redir,chardev=usbredirchardev0,id=usbredirdev0,bus=usb-controller-0.0 -chardev spicevmc,name=usbredir,id=usbredirchardev1 -device usb-redir,chardev=usbredirchardev1,id=usbredirdev1,bus=usb-controller-0.0 -chardev spicevmc,name=usbredir,id=usbredirchardev2 -device usb-redir,chardev=usbredirchardev2,id=usbredirdev2,bus=usb-controller-0.0 -device ide-hd,bus=ide.0,drive=drive0,bootindex=0 -drive "if=none,media=disk,id=drive0,file=/private/var/mobile/Containers/Data/Application/10D06309-1895-446D-BEBB-C87871750260/Documents/Android 4.4.utm/Images/android-4.4.qcow2,discard=unmap,detect-zeroes=unmap" -device virtio-serial -device virtserialport,chardev=org.qemu.guest_agent,name=org.qemu.guest_agent.0 -chardev spiceport,name=org.qemu.guest_agent.0,id=org.qemu.guest_agent -device virtserialport,chardev=vdagent,name=com.redhat.spice.0 -chardev spicevmc,id=vdagent,debug=0,name=vdagent -name "Android 44" -uuid 76D18910-E5B6-4859-8845-3DB263A94ABA -rtc base=localtime -device virtio-rng-pci -cpu max -global i440FX-pcihost.x-pci-hole64-fix=off -global q35-pcihost.x-pci-hole64-fix=off 2024-08-28 10:06:31.849680+0800 UTM[7008:2790562] [QEMULogging(0x280180a40)] Loading qemu-i386-softmmu.framework/qemu-i386-softmmu 2024-08-28 10:06:31.915446+0800 UTM[7008:2790937] [QEMULogging(0x280180a40)] UI Error: Could not connect: Connection refused qemu-i386-softmmu: -accel tcg,tb-size=256,split-wx=off: allocate 268435456 bytes for jit buffer: Invalid argument 2024-08-28 10:06:31.922010+0800 UTM[7008:2790565] [QEMULogging(0x280180a40)] QEMU exited with code -1: (no message) 2024-08-28 10:06:32.922820+0800 UTM[7008:2790570] [QEMULogging(0x280180a40)] Retrying interface connection... 2024-08-28 10:06:32.925803+0800 UTM[7008:2790937] [QEMULogging(0x280180a40)] 2024-08-28 02:06:32,925 WARNING GSpice-main-1:0: could not set sockopt TCP_NODELAY: Operation not supported on socket
I don't see how you're getting "split-wx=off". The only code to set that is "on". https://github.com/utmapp/UTM/blob/main/Configuration/UTMQemuConfiguration%2BArguments.swift#L411
Are you sure you're not running modified code?
I checked the description of the "-accel" parameter in qemu, and it doesn't require "split-wx=on". Additionally, in UTM SE, "split-wx" is not set to "on". So what did the UTM version do that requires "split-wx" to be set to "on"? @osy
I have another question, why does enabling JIT make the system loading speed of UTM much faster compared to the SE version? What has UTM done with JIT, including any optimizations made by the dependent QEMU? @osy
I experienced the following results on the iPhone 14 Pro: UTM takes only 30 seconds to load Android 4.4, while UTM SE takes more than 30 minutes.
Did you modify the code?
In order to compare, I tried modifying the code：https://github.com/utmapp/UTM/blob/main/Configuration/UTMQemuConfiguration%2BArguments.swift#L411
In the future, when reporting issues to any open source project, if you modify the code you must disclose it. That would prevent wasting people's time. In this case, you removed the line of code explicitly added for JIT to work.
In the future, when reporting issues to any open source project, if you modify the code you must disclose it. That would prevent wasting people's time. In this case, you removed the line of code explicitly added for JIT to work.
I apologize for not clarifying that I modified that line of code earlier, and for wasting your valuable time. Actually, I wanted to understand how JIT achieves acceleration, so I compared the differences with SE, and split-wx is a key point. Then I modified this configuration on the JIT version. Finally, does UTM SE v4.5.3 depend on the qemu branch v7.2.0-utm as well? @osy