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| author | Ke Wang <ke.wang@spreadtrum.com> | 2016-12-08 14:02:10 +0800 |
|---|---|---|
| committer | Amit Pundir <amit.pundir@linaro.org> | 2017-01-02 13:54:08 +0530 |
| commit | 3f5ec85c09a09411ccd133c4e0b84527502dba52 (patch) | |
| tree | bdb26b423be0075df41fc4df5d8e8f7c7f7bc92f /drivers/firmware/efi/arm-init.c | |
| parent | 26a380b3ce97e6c3919f7ea576b91b23f7e9728c (diff) | |
sched: fix wrong truncation of walt_avg
The result of "__entry->walt_avg = (__entry->demand << 10)" will exceed
the range of "unsigned int", which will be truncated and make the trace
looks like as follows:
UnityMain-4588 [004] 6029.645672: walt_update_history: 4588(UnityMain): runtime 9928307 samples 1 event 4
demand 9928307 walt 157 pelt 870 (hist: 9928307 9604307 8440077 87392 34144328) cpu 4
UnityMain-4588 [004] 6029.653658: walt_update_history: 4588(UnityMain): runtime 10000000 samples 1 event 4
demand 10000000 walt 165 pelt 886 (hist: 10000000 9955691 6549308 64000 34144328) cpu 4
Fix this by using a u64 type instead of unsgined int type and make the
trace as below:
UnityMain-4617 [004] 117.613558: walt_update_history: 4617(UnityMain): runtime 5770597 samples 1 event 4
demand 7038739 walt 720 pelt 680 (hist: 5770597 7680001 8904509 65596 156) cpu 4
UnityMain-4617 [004] 117.633560: walt_update_history: 4617(UnityMain): runtime 9911238 samples 1 event 4
demand 9911238 walt 1014 pelt 769 (hist: 9911238 5770597 7680001 0 1664188058) cpu 4
Signed-off-by: Ke Wang <ke.wang@spreadtrum.com>
Diffstat (limited to 'drivers/firmware/efi/arm-init.c')
0 files changed, 0 insertions, 0 deletions