diff options
| author | Viresh Kumar <viresh.kumar@linaro.org> | 2013-12-19 15:53:07 +0530 |
|---|---|---|
| committer | Viresh Kumar <viresh.kumar@linaro.org> | 2013-12-20 13:40:17 +0530 |
| commit | 1e31c33d89088a4c605274b1f29167a8d9e17852 (patch) | |
| tree | 1f6687062242bf772d8e3da3e5dc1849376a371d /common | |
| parent | 97e78cfdb81b04e19bad4290af74de5cd411d77c (diff) | |
is-cpu-isolated: Use Tick count of last loop
We are calculating time interval between ticks here. Currently it happens this
way:
1. Start Count
2. End Count
3. Take time difference between two
4. Repeat above three again.
The problem here is that we do a Start Count almost just after End Count. And
this can take a lot of time, i.e. equal to the time CPU is isolated. Which is
around 40 seconds for now.
So change this logic to do following:
1. Start Count
2. End Count
3. Take time difference between two
4. Start Time = End Time
5. Repeat 2->4 again.
Change-Id: I455c9d5182c2ca43544848a6524a61580fe56cc4
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'common')
| -rwxr-xr-x | common/scripts/is-cpu-isolated.sh | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/common/scripts/is-cpu-isolated.sh b/common/scripts/is-cpu-isolated.sh index 56da51c..c1802aa 100755 --- a/common/scripts/is-cpu-isolated.sh +++ b/common/scripts/is-cpu-isolated.sh @@ -45,24 +45,25 @@ get_isolation_duration() { new_count=$(get_tick_count) isdebug echo "initial count: " $new_count + old_count=$new_count + while [ $new_count -eq $old_count ] + do + new_count=$(get_tick_count) + done + + isdebug echo "count locked: " $new_count + + # Get time as a UNIX timestamp (seconds elapsed since Jan 1, 1970 0:00 UTC) + T2="$(date +%s)" + x=0 while [ $x -lt $sample_count ] do let x=x+1 - old_count=$new_count - while [ $new_count -eq $old_count ] - do - new_count=$(get_tick_count) - done - - isdebug echo "count locked: " $new_count - old_count=$new_count; - # Get time as a UNIX timestamp (seconds elapsed since Jan 1, 1970 0:00 UTC) - T1="$(date +%s)" - + T1=$T2 isdebug echo "Start Time in seconds: ${T1}" # sometimes there are continuous ticks, skip them. |