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I'm trying to read saved_tgids using adb: cat sys/kernel/debug/tracing/saved_tgids in samsung A5 with Android 8,but i get "permission denied". Instead if i try to execute the command using adb: cat sys/kernel/debug/tracing/saved_tgids in Pixel 3a XL with Android 8, it shows something. Why? The permission to access to file is the same: -r--r--r-- 1 root root 0 1970-01-01 01:00 saved_tgids

Luca
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  • Could you please tell us why you want to run ftrace so we can help better? – zomega Mar 08 '23 at 19:23
  • I want to set up ftrace tool in order to collect information regarding the system. I need to read saved_tgids file – Luca Mar 08 '23 at 22:13

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