== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:59:29 (1788274769)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 16.2549 s, 6.5 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-ffff8a5b50928000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.37118
Iter 1/10: OSS cache speed: 0.270697
Iter 1/10: ladvise speed: 0.284995
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.300093
Iter 2/10: OSS cache speed: 0.351332
Iter 2/10: ladvise speed: 0.235463
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.291543
Iter 3/10: OSS cache speed: 0.278148
Iter 3/10: ladvise speed: 0.284357
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.295558
Iter 4/10: OSS cache speed: 0.278837
Iter 4/10: ladvise speed: 0.306297
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.264272
Iter 5/10: OSS cache speed: 0.256146
Iter 5/10: ladvise speed: 0.265809
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.275059
Iter 6/10: OSS cache speed: 0.259439
Iter 6/10: ladvise speed: 0.244718
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.273333
Iter 7/10: OSS cache speed: 0.264309
Iter 7/10: ladvise speed: 0.288378
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.296855
Iter 8/10: OSS cache speed: 0.307422
Iter 8/10: ladvise speed: 0.332558
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.311426
Iter 9/10: OSS cache speed: 0.305808
Iter 9/10: ladvise speed: 0.255845
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.313667
Iter 10/10: OSS cache speed: 0.346597
Iter 10/10: ladvise speed: 0.361652
Average uncached read: .29
Average speedup with OSS cached read:  .29 = +0%
Average speedup with ladvise willread:  .28 = +-3%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0