== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:05:41 (1787468741)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.0195 s, 7.0 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-ffff8a0aa57c0800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.362656
Iter 1/10: OSS cache speed: 0.319796
Iter 1/10: ladvise speed: 0.397592
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.364508
Iter 2/10: OSS cache speed: 0.393492
Iter 2/10: ladvise speed: 0.334163
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.303871
Iter 3/10: OSS cache speed: 0.329241
Iter 3/10: ladvise speed: 0.371668
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.325791
Iter 4/10: OSS cache speed: 0.33583
Iter 4/10: ladvise speed: 0.372448
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.317333
Iter 5/10: OSS cache speed: 0.351464
Iter 5/10: ladvise speed: 0.324558
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.310818
Iter 6/10: OSS cache speed: 0.344565
Iter 6/10: ladvise speed: 0.349487
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.339295
Iter 7/10: OSS cache speed: 0.390112
Iter 7/10: ladvise speed: 0.393712
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.298061
Iter 8/10: OSS cache speed: 0.371444
Iter 8/10: ladvise speed: 0.436845
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.32318
Iter 9/10: OSS cache speed: 0.384989
Iter 9/10: ladvise speed: 0.353851
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.329647
Iter 10/10: OSS cache speed: 0.334707
Iter 10/10: ladvise speed: 0.382939
Average uncached read: .32
Average speedup with OSS cached read:  .35 = +9%
Average speedup with ladvise willread:  .37 = +15%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0