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-rw-r--r--tools/guest-diag/guest_pin_stream.py5
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/guest-diag/guest_pin_stream.py b/tools/guest-diag/guest_pin_stream.py
index 1ff0d3f..8d0b34d 100644
--- a/tools/guest-diag/guest_pin_stream.py
+++ b/tools/guest-diag/guest_pin_stream.py
@@ -25,7 +25,10 @@ PAMAX = int(sys.argv[5], 16) if len(sys.argv) > 5 else 0x180000000
INTERVAL = float(os.environ.get("STREAM_INTERVAL", "0.25"))
BATCH = 4096
REGION = 0x200000
-SPAN = int(os.environ.get("STREAM_SPAN", "0x10000"), 16)
+# The GR GPFIFO rings sit at 0x20020c000 + 0x3000*rank (region offset 0xc000
+# ..0x45000) and the per-channel push allocations follow; 512 KB per 2 MB
+# region covers both without scanning holes that hold nothing.
+SPAN = int(os.environ.get("STREAM_SPAN", "0x80000"), 16)
TRACE = ("/sys/kernel/tracing/trace"
if os.path.exists("/sys/kernel/tracing/trace")
else "/sys/kernel/debug/tracing/trace")