== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:33:15 (1784226795)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.76555 s, 15.5 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff91fa607b3800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.30187
Iter 1/10: OSS cache speed: 1.78914
Iter 1/10: ladvise speed: 1.4607
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.70324
Iter 2/10: OSS cache speed: 1.3979
Iter 2/10: ladvise speed: 1.6047
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.21402
Iter 3/10: OSS cache speed: 1.32408
Iter 3/10: ladvise speed: 1.71457
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.61521
Iter 4/10: OSS cache speed: 2.02221
Iter 4/10: ladvise speed: 2.28834
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.23751
Iter 5/10: OSS cache speed: 2.48939
Iter 5/10: ladvise speed: 2.6324
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.21396
Iter 6/10: OSS cache speed: 2.37104
Iter 6/10: ladvise speed: 1.26703
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.647752
Iter 7/10: OSS cache speed: 0.826409
Iter 7/10: ladvise speed: 0.847437
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.71222
Iter 8/10: OSS cache speed: 0.763567
Iter 8/10: ladvise speed: 1.06574
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.894976
Iter 9/10: OSS cache speed: 1.1206
Iter 9/10: ladvise speed: 1.12182
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.991485
Iter 10/10: OSS cache speed: 1.27231
Iter 10/10: ladvise speed: 1.34855
Average uncached read: 1.35
Average speedup with OSS cached read:  1.53 = +13%
Average speedup with ladvise willread:  1.53 = +13%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0