== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:10:27 (1780452627)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.1255 s, 9.4 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-ffff9257d2495000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.264571
Iter 1/10: OSS cache speed: 0.339546
Iter 1/10: ladvise speed: 0.291699
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.319347
Iter 2/10: OSS cache speed: 0.320647
Iter 2/10: ladvise speed: 0.287773
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.306705
Iter 3/10: OSS cache speed: 0.292308
Iter 3/10: ladvise speed: 0.303837
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.311341
Iter 4/10: OSS cache speed: 0.306194
Iter 4/10: ladvise speed: 0.328356
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.264917
Iter 5/10: OSS cache speed: 0.292318
Iter 5/10: ladvise speed: 0.299533
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.29864
Iter 6/10: OSS cache speed: 0.343017
Iter 6/10: ladvise speed: 0.314993
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.297413
Iter 7/10: OSS cache speed: 0.317524
Iter 7/10: ladvise speed: 0.36103
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.349941
Iter 8/10: OSS cache speed: 0.315457
Iter 8/10: ladvise speed: 0.338778
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.333749
Iter 9/10: OSS cache speed: 0.320433
Iter 9/10: ladvise speed: 0.314595
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.332716
Iter 10/10: OSS cache speed: 0.343272
Iter 10/10: ladvise speed: 0.290141
Average uncached read: .30
Average speedup with OSS cached read:  .31 = +3%
Average speedup with ladvise willread:  .31 = +3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0