== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:38:52 (1787117932)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.1335 s, 8.6 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-ffff99ac5a27b000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.367071
Iter 1/10: OSS cache speed: 0.344742
Iter 1/10: ladvise speed: 0.440805
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.391692
Iter 2/10: OSS cache speed: 0.403623
Iter 2/10: ladvise speed: 0.410363
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.315939
Iter 3/10: OSS cache speed: 0.338499
Iter 3/10: ladvise speed: 0.342865
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.376236
Iter 4/10: OSS cache speed: 0.415346
Iter 4/10: ladvise speed: 0.33381
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.426497
Iter 5/10: OSS cache speed: 0.396918
Iter 5/10: ladvise speed: 0.338125
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.394776
Iter 6/10: OSS cache speed: 0.393458
Iter 6/10: ladvise speed: 0.331465
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.389646
Iter 7/10: OSS cache speed: 0.349943
Iter 7/10: ladvise speed: 0.39843
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.399706
Iter 8/10: OSS cache speed: 0.419128
Iter 8/10: ladvise speed: 0.430807
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.411963
Iter 9/10: OSS cache speed: 0.445861
Iter 9/10: ladvise speed: 0.414952
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.384184
Iter 10/10: OSS cache speed: 0.426456
Iter 10/10: ladvise speed: 0.391488
Average uncached read: .38
Average speedup with OSS cached read:  .39 = +2%
Average speedup with ladvise willread:  .38 = +0%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0