== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:41:57 (1786308117)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.6814 s, 7.1 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-ffff8f1b540b0800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.282185
Iter 1/10: OSS cache speed: 0.276064
Iter 1/10: ladvise speed: 0.295189
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.351096
Iter 2/10: OSS cache speed: 0.316396
Iter 2/10: ladvise speed: 0.318911
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.322379
Iter 3/10: OSS cache speed: 0.338944
Iter 3/10: ladvise speed: 0.33069
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.339699
Iter 4/10: OSS cache speed: 0.298877
Iter 4/10: ladvise speed: 0.342214
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.379555
Iter 5/10: OSS cache speed: 0.315213
Iter 5/10: ladvise speed: 0.35079
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.344039
Iter 6/10: OSS cache speed: 0.314592
Iter 6/10: ladvise speed: 0.292912
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.345572
Iter 7/10: OSS cache speed: 0.361141
Iter 7/10: ladvise speed: 0.273589
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.308298
Iter 8/10: OSS cache speed: 0.330177
Iter 8/10: ladvise speed: 0.299552
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.296935
Iter 9/10: OSS cache speed: 0.301374
Iter 9/10: ladvise speed: 0.323933
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.30738
Iter 10/10: OSS cache speed: 0.317691
Iter 10/10: ladvise speed: 0.340358
Average uncached read: .32
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