| Name | Size | Last modified (GMT) | Description | |
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| Parent directory | 2024-08-12 04:20:17 | ||
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| Makefile | 1745 bytes | 2024-08-12 04:20:17 | |
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| README | 3158 bytes | 2024-08-12 04:20:17 | |
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| TODO | 248 bytes | 2024-08-12 04:20:17 | |
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| asm-offsets.h | 247 bytes | 2024-08-12 04:20:17 | |
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| asm-utils.S | 2831 bytes | 2024-08-12 04:20:17 | |
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| assembler.h | 1199 bytes | 2024-08-12 04:20:17 | |
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| fp-pidbench.S | 1247 bytes | 2024-08-12 04:20:17 | |
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| fp-ptrace-asm.S | 5928 bytes | 2024-08-12 04:20:17 | |
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| fp-ptrace.c | 35914 bytes | 2024-08-12 04:20:17 | |
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| fp-ptrace.h | 251 bytes | 2024-08-12 04:20:17 | |
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| fp-stress.c | 14506 bytes | 2024-08-12 04:20:17 | |
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| fpsimd-stress | 714 bytes | 2024-08-12 04:20:17 | |
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| fpsimd-test.S | 5884 bytes | 2024-08-12 04:20:17 | |
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| kernel-test.c | 6691 bytes | 2024-08-12 04:20:17 | |
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| rdvl-sme.c | 156 bytes | 2024-08-12 04:20:17 | |
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| rdvl-sve.c | 156 bytes | 2024-08-12 04:20:17 | |
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| rdvl.S | 251 bytes | 2024-08-12 04:20:17 | |
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| rdvl.h | 124 bytes | 2024-08-12 04:20:17 | |
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| sme-inst.h | 1102 bytes | 2024-08-12 04:20:17 | |
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| ssve-stress | 691 bytes | 2024-08-12 04:20:17 | |
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| sve-probe-vls.c | 1467 bytes | 2024-08-12 04:20:17 | |
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| sve-ptrace.c | 18749 bytes | 2024-08-12 04:20:17 | |
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| sve-stress | 690 bytes | 2024-08-12 04:20:17 | |
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| sve-test.S | 9881 bytes | 2024-08-12 04:20:17 | |
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| vec-syscfg.c | 18643 bytes | 2024-08-12 04:20:17 | |
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| vlset.c | 3423 bytes | 2024-08-12 04:20:17 | |
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| za-fork-asm.S | 979 bytes | 2024-08-12 04:20:17 | |
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| za-fork.c | 2024 bytes | 2024-08-12 04:20:17 | |
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| za-ptrace.c | 7890 bytes | 2024-08-12 04:20:17 | |
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| za-stress | 689 bytes | 2024-08-12 04:20:17 | |
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| za-test.S | 7273 bytes | 2024-08-12 04:20:17 | |
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| zt-ptrace.c | 7015 bytes | 2024-08-12 04:20:17 | |
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| zt-test.S | 5599 bytes | 2024-08-12 04:20:17 |
1 This directory contains a mix of tests integrated with kselftest and 2 standalone stress tests. 3 4 kselftest tests 5 =============== 6 7 sve-probe-vls - Checks the SVE vector length enumeration interface 8 sve-ptrace - Checks the SVE ptrace interface 9 10 Running the non-kselftest tests 11 =============================== 12 13 sve-stress performs an SVE context switch stress test, as described 14 below. 15 16 (The fpsimd-stress test works the same way; just substitute "fpsimd" for 17 "sve" in the following commands.) 18 19 20 The test runs until killed by the user. 21 22 If no context switch error was detected, you will see output such as 23 the following: 24 25 $ ./sve-stress 26 (wait for some time) 27 ^C 28 Vector length: 512 bits 29 PID: 1573 30 Terminated by signal 15, no error, iterations=9467, signals=1014 31 Vector length: 512 bits 32 PID: 1575 33 Terminated by signal 15, no error, iterations=9448, signals=1028 34 Vector length: 512 bits 35 PID: 1577 36 Terminated by signal 15, no error, iterations=9436, signals=1039 37 Vector length: 512 bits 38 PID: 1579 39 Terminated by signal 15, no error, iterations=9421, signals=1039 40 Vector length: 512 bits 41 PID: 1581 42 Terminated by signal 15, no error, iterations=9403, signals=1039 43 Vector length: 512 bits 44 PID: 1583 45 Terminated by signal 15, no error, iterations=9385, signals=1036 46 Vector length: 512 bits 47 PID: 1585 48 Terminated by signal 15, no error, iterations=9376, signals=1039 49 Vector length: 512 bits 50 PID: 1587 51 Terminated by signal 15, no error, iterations=9361, signals=1039 52 Vector length: 512 bits 53 PID: 1589 54 Terminated by signal 15, no error, iterations=9350, signals=1039 55 56 57 If an error was detected, details of the mismatch will be printed 58 instead of "no error". 59 60 Ideally, the test should be allowed to run for many minutes or hours 61 to maximise test coverage. 62 63 64 KVM stress testing 65 ================== 66 67 To try to reproduce the bugs that we have been observing, sve-stress 68 should be run in parallel in two KVM guests, while simultaneously 69 running on the host. 70 71 1) Start 2 guests, using the following command for each: 72 73 $ lkvm run --console=virtio -pconsole=hvc0 --sve Image 74 75 (Depending on the hardware GIC implementation, you may also need 76 --irqchip=gicv3. New kvmtool defaults to that if appropriate, but I 77 can't remember whether my branch is new enough for that. Try without 78 the option first.) 79 80 Kvmtool occupies the terminal until you kill it (Ctrl+A x), 81 or until the guest terminates. It is therefore recommended to run 82 each instance in separate terminal (use screen or ssh etc.) This 83 allows multiple guests to be run in parallel while running other 84 commands on the host. 85 86 Within the guest, the host filesystem is accessible, mounted on /host. 87 88 2) Run the sve-stress on *each* guest with the Vector-Length set to 32: 89 guest$ ./vlset --inherit 32 ./sve-stress 90 91 3) Run the sve-stress on the host with the maximum Vector-Length: 92 host$ ./vlset --inherit --max ./sve-stress 93 94 95 Again, the test should be allowed to run for many minutes or hours to 96 maximise test coverage. 97 98 If no error is detected, you will see output from each sve-stress 99 instance similar to that illustrated above; otherwise details of the 100 observed mismatches will be printed.
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