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| author | Chen Yu <yu.c.chen@intel.com> | 2020-04-18 11:31:57 +0300 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2020-09-03 20:57:47 +0300 |
| commit | 87e15da95775a2ffb8c444e84f08ca982b758364 (patch) | |
| tree | 6fea42b1ca1c1afcd88160bff1d636bd7cbf8184 /tools/power/x86/turbostat/Makefile | |
| parent | 7c2ccc507bd44d17227930181f937b2066565349 (diff) | |
| download | linux-87e15da95775a2ffb8c444e84f08ca982b758364.tar.xz | |
tools/power turbostat: Introduce functions to accumulate RAPL consumption
Since the RAPL Joule Counter is 32 bit, turbostat would
only print a *star* instead of printing the actual energy
consumed to indicate the overflow due to long duration.
This does not meet the requirement from servers as the
sampling time of turbostat is usually very long on servers.
So maintain a set of MSR buffer, and update them
periodically before the 32bit MSR register is wrapped round,
so as to avoid the overflow.
The idea is similar to the implementation of ktime_get():
Periodical MSR timer:
total_rapl_sum += (current_rapl_msr - last_rapl_msr);
Using get_msr_sum() to get the accumulated RAPL:
return (current_rapl_msr - last_rapl_msr) + total_rapl_sum;
The accumulated RAPL mechanism will be turned on in next patch.
Originally-by: Aaron Lu <aaron.lwe@gmail.com>
Reviewed-by: Doug Smythies <dsmythies@telus.net>
Tested-by: Doug Smythies <dsmythies@telus.net>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'tools/power/x86/turbostat/Makefile')
| -rw-r--r-- | tools/power/x86/turbostat/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/power/x86/turbostat/Makefile b/tools/power/x86/turbostat/Makefile index 2b6551269e43..d08765531bcb 100644 --- a/tools/power/x86/turbostat/Makefile +++ b/tools/power/x86/turbostat/Makefile @@ -16,7 +16,7 @@ override CFLAGS += -D_FORTIFY_SOURCE=2 %: %.c @mkdir -p $(BUILD_OUTPUT) - $(CC) $(CFLAGS) $< -o $(BUILD_OUTPUT)/$@ $(LDFLAGS) -lcap + $(CC) $(CFLAGS) $< -o $(BUILD_OUTPUT)/$@ $(LDFLAGS) -lcap -lrt .PHONY : clean clean : |