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| author | Jamie Liu <jamieliu@google.com> | 2020-05-19 11:51:28 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2020-05-19 11:53:03 -0700 |
| commit | 064347afdf6206df73571684a3a75dde63584ad5 (patch) | |
| tree | f68ec7fe6995d9411301548c88c781c00abfa5fd /pkg/usermem/usermem.go | |
| parent | d06de1bede9c40078fe674a6df4849fe3322a861 (diff) | |
Skip itimer "fairness" tests on ptrace.
With additional logging, the issue described by the new comment looks like:
D0518 21:28:08.416810 6777 task_signals.go:459] [ 8] Notified of signal 27
D0518 21:28:08.416852 6777 task_block.go:223] [ 8] Interrupt queued
D0518 21:28:08.417013 6777 task_run.go:250] [ 8] Switching to sentry
D0518 21:28:08.417033 6777 task_signals.go:220] [ 8] Signal 27: delivering to handler
D0518 21:28:08.417127 6777 task_run.go:248] [ 8] Switching to app
D0518 21:28:08.443765 6777 task_signals.go:519] [ 8] Refusing masked signal 27 // ED: note the ~26ms elapsed since TID 8 "switched to app"
D0518 21:28:08.443814 6777 task_signals.go:465] [ 6] Notified of group signal 27
D0518 21:28:08.443832 6777 task_block.go:223] [ 6] Interrupt queued
D0518 21:28:08.443914 6777 task_block.go:223] [ 6] Interrupt queued
D0518 21:28:08.443859 6777 task_run.go:250] [ 8] Switching to sentry
I0518 21:28:08.443936 6777 strace.go:576] [ 8] exe E rt_sigreturn()
Slow context switches on ptrace are probably due to kernel scheduling delays.
Slow context switches on KVM are less clear, so leave that bug and TODO open.
PiperOrigin-RevId: 312322782
Diffstat (limited to 'pkg/usermem/usermem.go')
0 files changed, 0 insertions, 0 deletions