perf: Fix trace path handling in scripts

Fix `run.sh` and `run_traces.sh` trace path handling by taking into
account that the `--trace` option may contain a multi-directory path
relative to traces-db.

Together with this fix, you should expect to find the output directory
of a perf testing session under the same directory of the trace file.

Signed-off-by: Antonio Caggiano <antonio.caggiano@collabora.com>
Reviewed-by: Gert Wollny <gert.wollny@collabora.com>

perf-testing/Docker/run.sh

@@ -132,9 +132,8 @@ export LD_LIBRARY_PATH="/waffle/build/lib:$LD_LIBRARY_PATH"
 export LD_LIBRARY_PATH="/usr/local/lib:$LD_LIBRARY_PATH"
 export LD_LIBRARY_PATH="/usr/local/lib/x86_64-linux-gnu:$LD_LIBRARY_PATH"
 
-trace_name=$(basename $trace)
-trace_base=${trace_name%.*}
-datadir="/traces-db/${trace_base}-out"
+trace_no_ext=${trace%.*}
+datadir="/traces-db/${trace_no_ext}-out"
 
 echo "Host:"
 wflinfo --platform surfaceless_egl --api gles2
@@ -175,10 +174,10 @@ echo 1 > /proc/sys/net/ipv4/ip_forward
 
 
 # store name of trace to be replayed so the guest can obtain the name 
-echo $trace_base > /traces-db/current_trace
+echo $trace_no_ext > /traces-db/current_trace
 echo $command > /traces-db/command
 
-
+trace_base=$(basename $trace_no_ext)
 guest_perf="$datadir/${trace_base}-guest.perfetto"
 host_perf="$datadir/${trace_base}-host.perfetto"
 summary_perf="$datadir/${trace_base}-summary.perfetto"

perf-testing/Docker/run_traces.sh

@@ -34,8 +34,8 @@ time chronyd -q   # Initial synchronization, will take some time
 chronyd      # Keep clocks in sync
 
 # Get trace cached
-trace_base=$(cat /traces-db/current_trace)
-if [ "x$trace_base" = "x" ]; then
+trace_no_ext=$(cat /traces-db/current_trace)
+if [ "x$trace_no_ext" = "x" ]; then
     echo "No trace given, bailing out"
     exit 1 
 fi
@@ -75,8 +75,9 @@ if [ -e /traces-db/wait_after_frame ]; then
    WAIT=-wait-after-frame
 fi
 
-trace="/traces-db/${trace_base}.trace"
-datadir="/traces-db/${trace_base}-out"
+trace="/traces-db/${trace_no_ext}.trace"
+datadir="/traces-db/${trace_no_ext}-out"
+trace_base=$(basename ${trace_no_ext})
 guest_perf="$datadir/${trace_base}-guest.perfetto"
 
 cat "$trace" > /dev/null