Function report |
Source Code:arch\x86\kernel\cpu\aperfmperf.c |
Create Date:2022-07-28 07:56:36 |
| Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
| home page | Tree |
| Annotation kernel can get tool activity | Download SCCT | Chinese |
Name:aperfmperf_snapshot_cpu
Proto:static bool aperfmperf_snapshot_cpu(int cpu, ktime_t now, bool wait)
Type:bool
Parameter:
| Type | Parameter | Name |
|---|---|---|
| int | cpu | |
| ktime_t | now | |
| bool | wait |
| 69 | time_delta = ktime_ms_delta(now, per_cpu(time, cpu)) |
| 72 | If time_delta < APERFMPERF_CACHE_THRESHOLD_MS Then Return true |
| 75 | smp_call_function_single(cpu, aperfmperf_snapshot_khz()* On the current CPU, snapshot APERF, MPERF, and jiffies* unless we already did it within 10ms* calculate kHz, save snapshot, NULL, wait) |
| 78 | Return time_delta <= APERFMPERF_STALE_THRESHOLD_MS |
| Name | Describe |
|---|---|
| aperfmperf_get_khz | |
| arch_freq_prepare_all | |
| arch_freq_get_on_cpu |
| Source code conversion tool public plug-in interface | X |
|---|---|
| Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion |