== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:20:04 (1775863204)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.73881 s, 18.3 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-ffff9ee1c54b9000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.33882
Iter 1/10: OSS cache speed: 2.4655
Iter 1/10: ladvise speed: 2.53201
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.33946
Iter 2/10: OSS cache speed: 2.61937
Iter 2/10: ladvise speed: 2.58841
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.16569
Iter 3/10: OSS cache speed: 1.45721
Iter 3/10: ladvise speed: 1.74733
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.24705
Iter 4/10: OSS cache speed: 2.32649
Iter 4/10: ladvise speed: 2.33697
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.24665
Iter 5/10: OSS cache speed: 2.68062
Iter 5/10: ladvise speed: 2.46134
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.25661
Iter 6/10: OSS cache speed: 2.36864
Iter 6/10: ladvise speed: 1.28131
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.924624
Iter 7/10: OSS cache speed: 2.10409
Iter 7/10: ladvise speed: 2.42142
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.21353
Iter 8/10: OSS cache speed: 2.42388
Iter 8/10: ladvise speed: 2.46266
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.24465
Iter 9/10: OSS cache speed: 2.44948
Iter 9/10: ladvise speed: 2.36565
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.78481
Iter 10/10: OSS cache speed: 2.35632
Iter 10/10: ladvise speed: 2.3283
Average uncached read: 1.97
Average speedup with OSS cached read:  2.32 = +17%
Average speedup with ladvise willread:  2.25 = +14%
Speedup with OSS cached read less than 20%,  got 17%. Skipping ladvise willread check.
fail_loc=0