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Faster backups

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- Add file pre-allocations to greatly reduce overhead of FatFS.
This was missing before, because it takes 1.5KB payload size.

Speed bumps (no verify) are between 7 to 30% for exFAT and ~50% for FAT32, depending on the workload.
This commit is contained in:
Kostas Missos 2018-08-22 03:42:25 +03:00
parent da5a1a9641
commit 0540128709
1 changed files with 14 additions and 0 deletions
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14
bootloader/main.c
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@ -1023,6 +1023,12 @@ int dump_emmc_part(char *sd_path, sdmmc_storage_t *storage, emmc_part_t *part)
return 0;
}
u64 totalSize = (u64)((u64)totalSectors << 9);
if (!isSmallSdCard && sd_fs.fs_type == FS_EXFAT)
f_lseek(&fp, totalSize);
else
f_lseek(&fp, MIN(totalSize, multipartSplitSize));
f_lseek(&fp, 0);
u32 numSectorsPerIter = 0;
if (totalSectors > 0x200000)
@ -1122,6 +1128,10 @@ int dump_emmc_part(char *sd_path, sdmmc_storage_t *storage, emmc_part_t *part)
return 0;
}
bytesWritten = 0;
totalSize = (u64)((u64)totalSectors << 9);
f_lseek(&fp, MIN(totalSize, multipartSplitSize));
f_lseek(&fp, 0);
}
retryCount = 0;
@ -1141,6 +1151,8 @@ int dump_emmc_part(char *sd_path, sdmmc_storage_t *storage, emmc_part_t *part)
free(buf);
f_close(&fp);
f_unlink(outFilename);
return 0;
}
}
@ -1153,6 +1165,8 @@ int dump_emmc_part(char *sd_path, sdmmc_storage_t *storage, emmc_part_t *part)
free(buf);
f_close(&fp);
f_unlink(outFilename);
return 0;
}
pct = (u64)((u64)(lba_curr - part->lba_start) * 100u) / (u64)(part->lba_end - part->lba_start);