== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:54:42 (1784084082)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.58672 s, 18.8 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-ffff94b210efa800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.14052
Iter 1/10: OSS cache speed: 2.32972
Iter 1/10: ladvise speed: 2.39792
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.36755
Iter 2/10: OSS cache speed: 0.962591
Iter 2/10: ladvise speed: 0.994491
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.689729
Iter 3/10: OSS cache speed: 0.842459
Iter 3/10: ladvise speed: 0.84125
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.750379
Iter 4/10: OSS cache speed: 1.05736
Iter 4/10: ladvise speed: 1.29839
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.05403
Iter 5/10: OSS cache speed: 1.43194
Iter 5/10: ladvise speed: 1.85899
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.81973
Iter 6/10: OSS cache speed: 2.28154
Iter 6/10: ladvise speed: 2.00343
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.64751
Iter 7/10: OSS cache speed: 1.9042
Iter 7/10: ladvise speed: 2.02252
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.08402
Iter 8/10: OSS cache speed: 2.32079
Iter 8/10: ladvise speed: 2.34559
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.16354
Iter 9/10: OSS cache speed: 2.61058
Iter 9/10: ladvise speed: 2.34895
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.40918
Iter 10/10: OSS cache speed: 2.33741
Iter 10/10: ladvise speed: 2.37764
Average uncached read: 1.61
Average speedup with OSS cached read:  1.80 = +11%
Average speedup with ladvise willread:  1.84 = +14%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0