== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:54:57 (1782730497)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.8565 s, 8.2 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-ffff9e0620b3d000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.307709
Iter 1/10: OSS cache speed: 0.314175
Iter 1/10: ladvise speed: 0.320887
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.317627
Iter 2/10: OSS cache speed: 0.310981
Iter 2/10: ladvise speed: 0.319266
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.284743
Iter 3/10: OSS cache speed: 0.313103
Iter 3/10: ladvise speed: 0.332052
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.316547
Iter 4/10: OSS cache speed: 0.335898
Iter 4/10: ladvise speed: 0.339786
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.317122
Iter 5/10: OSS cache speed: 0.354544
Iter 5/10: ladvise speed: 0.301642
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.278554
Iter 6/10: OSS cache speed: 0.331499
Iter 6/10: ladvise speed: 0.302533
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.335712
Iter 7/10: OSS cache speed: 0.296669
Iter 7/10: ladvise speed: 0.307754
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.299679
Iter 8/10: OSS cache speed: 0.304005
Iter 8/10: ladvise speed: 0.295203
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.331833
Iter 9/10: OSS cache speed: 0.294494
Iter 9/10: ladvise speed: 0.280218
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.308475
Iter 10/10: OSS cache speed: 0.295133
Iter 10/10: ladvise speed: 0.256565
Average uncached read: .30
Average speedup with OSS cached read:  .31 = +3%
Average speedup with ladvise willread:  .30 = +0%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0