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Measure kernelflinger boot time #91

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Measure kernelflinger boot time #91

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1 change: 1 addition & 0 deletions include/android.h
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,7 @@
#define BOOT_ARGS_SIZE 512
#define BOOT_EXTRA_ARGS_SIZE 1024

extern UINT64 start_tsc;

struct boot_img_hdr
{
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1 change: 1 addition & 0 deletions include/timer.h
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Expand Up @@ -45,6 +45,7 @@ enum TM_POINT {
TM_POINT_LAST
};

uint64_t __attribute__((unused,always_inline)) __RDTSC (void);
uint32_t get_cpu_freq(void);
uint32_t boottime_in_msec(void);
void set_boottime_stamp(int num);
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1 change: 1 addition & 0 deletions kernelflinger.c
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Expand Up @@ -1196,6 +1196,7 @@ EFI_STATUS efi_main(EFI_HANDLE image, EFI_SYSTEM_TABLE *sys_table)
VBDATA *vb_data = NULL;

set_boottime_stamp(TM_EFI_MAIN);
start_tsc = __RDTSC();
/* gnu-efi initialization */
InitializeLib(image, sys_table);

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7 changes: 7 additions & 0 deletions libkernelflinger/android.c
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Expand Up @@ -240,6 +240,7 @@ typedef struct {
} __attribute__((packed)) dt_addr_t;

static dt_addr_t *gdt;
UINT64 start_tsc;

typedef void(*kernel_func)(void *, struct boot_params *);

Expand Down Expand Up @@ -1601,6 +1602,7 @@ static EFI_STATUS handover_kernel(CHAR8 *bootimage, EFI_HANDLE parent_image)
UINT32 koffset;
size_t setup_header_size;
size_t setup_header_end;
UINT64 end_tsc;

aosp_header = (struct boot_img_hdr *)bootimage;
buf = get_boot_param_hdr(bootimage);
Expand Down Expand Up @@ -1677,6 +1679,11 @@ static EFI_STATUS handover_kernel(CHAR8 *bootimage, EFI_HANDLE parent_image)
goto out;
boot_params->hdr.code32_start = (UINT32)((UINT64)kernel_start);

end_tsc = __RDTSC();
log(L"start tsc = %llx\n", start_tsc);
log(L"end tsc = %llx\n", end_tsc);
log(L"total tsc consumed by kernelflinger = %llx\n", end_tsc - start_tsc);

ret = handover_jump(parent_image, boot_params, kernel_start);
/* Shouldn't get here */
efi_perror(ret, L"handover to Linux kernel has failed");
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2 changes: 1 addition & 1 deletion libkernelflinger/timer.c
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Expand Up @@ -69,7 +69,7 @@ __RDMSR (unsigned idx)
return msr.val;
}

static uint64_t __attribute__((unused,always_inline))
uint64_t __attribute__((unused,always_inline))
__RDTSC (void)
{
uint32_t lo, hi;
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