== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:38:35 (1787859515)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.2207 s, 7.9 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-ffff9cd2c3eed000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.374736
Iter 1/10: OSS cache speed: 0.465105
Iter 1/10: ladvise speed: 0.48893
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.451134
Iter 2/10: OSS cache speed: 0.490277
Iter 2/10: ladvise speed: 0.458571
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.414821
Iter 3/10: OSS cache speed: 0.460164
Iter 3/10: ladvise speed: 0.491856
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.415057
Iter 4/10: OSS cache speed: 0.504017
Iter 4/10: ladvise speed: 0.463324
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.497864
Iter 5/10: OSS cache speed: 0.403372
Iter 5/10: ladvise speed: 0.47751
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.47428
Iter 6/10: OSS cache speed: 0.426072
Iter 6/10: ladvise speed: 0.417907
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.359742
Iter 7/10: OSS cache speed: 0.455954
Iter 7/10: ladvise speed: 0.497661
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.487716
Iter 8/10: OSS cache speed: 0.513554
Iter 8/10: ladvise speed: 0.433174
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.507832
Iter 9/10: OSS cache speed: 0.492666
Iter 9/10: ladvise speed: 0.488999
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.482785
Iter 10/10: OSS cache speed: 0.462741
Iter 10/10: ladvise speed: 0.438594
Average uncached read: .44
Average speedup with OSS cached read:  .46 = +4%
Average speedup with ladvise willread:  .46 = +4%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0