== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:45:57 (1788515157)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.1691 s, 8.0 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-ffff9190c9832000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.38086
Iter 1/10: OSS cache speed: 0.362411
Iter 1/10: ladvise speed: 0.434204
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.394844
Iter 2/10: OSS cache speed: 0.429183
Iter 2/10: ladvise speed: 0.444268
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.330178
Iter 3/10: OSS cache speed: 0.461941
Iter 3/10: ladvise speed: 0.371718
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.376291
Iter 4/10: OSS cache speed: 0.460934
Iter 4/10: ladvise speed: 0.442672
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.369273
Iter 5/10: OSS cache speed: 0.375304
Iter 5/10: ladvise speed: 0.419524
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.38247
Iter 6/10: OSS cache speed: 0.363222
Iter 6/10: ladvise speed: 0.386279
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.345072
Iter 7/10: OSS cache speed: 0.449195
Iter 7/10: ladvise speed: 0.332248
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.361065
Iter 8/10: OSS cache speed: 0.393195
Iter 8/10: ladvise speed: 0.391281
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.377435
Iter 9/10: OSS cache speed: 0.33193
Iter 9/10: ladvise speed: 0.325
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.348147
Iter 10/10: OSS cache speed: 0.280468
Iter 10/10: ladvise speed: 0.355886
Average uncached read: .36
Average speedup with OSS cached read:  .39 = +8%
Average speedup with ladvise willread:  .39 = +8%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0