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lib.sh: add detailed description of func_lib_start_log_collect() #906

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Merged
marc-hb merged 2 commits into from
May 16, 2022
Merged

lib.sh: add detailed description of func_lib_start_log_collect() #906

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f56bb6e
lib.sh: add missing quotes for $ipc_type
marc-hb May 13, 2022
db5caef
lib.sh: add detailed description of func_lib_start_log_collect()
marc-hb May 13, 2022
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20 changes: 19 additions & 1 deletion case-lib/lib.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -152,6 +152,24 @@ find_ldc_file()
}

SOF_LOG_COLLECT=0
# This function starts a logger in the background using '&'
#
# 0. Without any argument is it used to read the DMA trace
# continuously from /sys/kernel/debug/sof/trace.
#
# 1. It is also invoked at the end of a test with an argument other than
# '0' for a one-shot collection of the shared memory 'etrace' in the
# same directory. In that second usage, the caller is expected to sleep
# a little bit while the collection happens in the "pseudo-background".
#
# Note the sof-logger is not able to "stream" logs from the 'etrace'
# ring buffer (nor from any ring buffer), it can only take a snapshot of
# that ring buffer. For the DMA trace, the Linux kernel implements the
# streaming feature. See
# https://github.com/thesofproject/linux/issues/3275 for more info.
#
# Zephyr's cavstool.py implements streaming and is able to read
# continously from the etrace ring buffer.
func_lib_start_log_collect()
{
local is_etrace=${1:-0} ldcFile
Expand Down Expand Up @@ -474,7 +492,7 @@ ipc4_used()
# If the value of file ipc_type is:
# 0: DUT runs IPC3 mode, ipc_used return 1(false)
# 1: DUT runs IPC4 mode, ipc4_used return 0(true)
[ $ipc_type -eq 1 ] || {
[ "$ipc_type" -eq 1 ] || {
return 1
}
return 0
Expand Down