== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:11:52 (1786533112)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.594 s, 15.9 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-ffff9b2dd8bd4000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.820291
Iter 1/10: OSS cache speed: 0.832873
Iter 1/10: ladvise speed: 1.05362
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.09453
Iter 2/10: OSS cache speed: 1.15725
Iter 2/10: ladvise speed: 0.863477
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.984471
Iter 3/10: OSS cache speed: 1.05171
Iter 3/10: ladvise speed: 1.52671
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.8495
Iter 4/10: OSS cache speed: 1.7479
Iter 4/10: ladvise speed: 1.75209
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.00895
Iter 5/10: OSS cache speed: 2.0424
Iter 5/10: ladvise speed: 1.97706
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.99439
Iter 6/10: OSS cache speed: 1.65918
Iter 6/10: ladvise speed: 2.02184
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.05132
Iter 7/10: OSS cache speed: 1.97163
Iter 7/10: ladvise speed: 2.15052
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.19195
Iter 8/10: OSS cache speed: 2.13842
Iter 8/10: ladvise speed: 2.17471
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.10462
Iter 9/10: OSS cache speed: 2.08547
Iter 9/10: ladvise speed: 2.04019
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.11425
Iter 10/10: OSS cache speed: 1.96815
Iter 10/10: ladvise speed: 2.07284
Average uncached read: 1.72
Average speedup with OSS cached read:  1.66 = +-3%
Average speedup with ladvise willread:  1.76 = +2%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0