diff options
| author | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-09-29 17:31:55 -0400 |
|---|---|---|
| committer | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-09-29 17:31:55 -0400 |
| commit | 3588d59e251c3256528fb4064b55adfb4988f921 (patch) | |
| tree | 8348c7754a323b8318efa2631280f24bfe37c1cf /tools/guest-diag/guest_kprobes.sh | |
| parent | fcb74dfd32442af859ac45979138b40279f96553 (diff) | |
| download | open-iov-3588d59e251c3256528fb4064b55adfb4988f921.tar.gz open-iov-3588d59e251c3256528fb4064b55adfb4988f921.zip | |
guest-diag: enlarge and clear the trace ring at probe install
The client's spin floods the default ring with uvmt/uvsv events; a one-shot
uvbp event was overwritten before the pin scanner read it (push-buffer pin
landed ~50 s after the client began pushing). 64 MB ring + clear.
Diffstat (limited to 'tools/guest-diag/guest_kprobes.sh')
| -rw-r--r-- | tools/guest-diag/guest_kprobes.sh | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/tools/guest-diag/guest_kprobes.sh b/tools/guest-diag/guest_kprobes.sh index 3a7e2b4..3f28b29 100644 --- a/tools/guest-diag/guest_kprobes.sh +++ b/tools/guest-diag/guest_kprobes.sh @@ -67,5 +67,10 @@ echo "-:uvsvr" >> "$TR/kprobe_events" 2>/dev/null echo 'r:uvsvr uvm_gpu_tracking_semaphore_is_value_completed $retval' >> "$TR/kprobe_events" 2>/dev/null echo 1 > "$TR/events/kprobes/enable" 2>/dev/null || true +# The client's spin floods the trace with uvmt/uvsv events; a one-shot uvbp +# (first push-buffer begin) can be overwritten before the pin scanner reads +# it. Enlarge the ring and clear it so the first events survive. +echo 65536 > "$TR/buffer_size_kb" 2>/dev/null || true +echo > "$TR/trace" 2>/dev/null || true echo "--- installed probes ---" grep -E 'uvmt|uvch|uvbp|uvpbf|uvtw|uvsv' "$TR/kprobe_events" 2>/dev/null || echo "(none)" |