== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:49:26 (1788727766)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.4833 s, 6.8 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-ffff94c2d8707800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.499073
Iter 1/10: OSS cache speed: 0.604196
Iter 1/10: ladvise speed: 0.589081
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.569178
Iter 2/10: OSS cache speed: 0.613495
Iter 2/10: ladvise speed: 0.642706
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.576999
Iter 3/10: OSS cache speed: 0.573271
Iter 3/10: ladvise speed: 0.527499
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.503497
Iter 4/10: OSS cache speed: 0.622535
Iter 4/10: ladvise speed: 0.618564
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.641078
Iter 5/10: OSS cache speed: 0.674932
Iter 5/10: ladvise speed: 0.678923
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.61724
Iter 6/10: OSS cache speed: 0.652458
Iter 6/10: ladvise speed: 0.735505
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.642047
Iter 7/10: OSS cache speed: 0.724127
Iter 7/10: ladvise speed: 0.778051
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.718795
Iter 8/10: OSS cache speed: 0.802789
Iter 8/10: ladvise speed: 0.882539
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.72159
Iter 9/10: OSS cache speed: 0.902161
Iter 9/10: ladvise speed: 0.885327
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.707946
Iter 10/10: OSS cache speed: 0.768888
Iter 10/10: ladvise speed: 0.825314
Average uncached read: .61
Average speedup with OSS cached read:  .69 = +13%
Average speedup with ladvise willread:  .71 = +16%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0