== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:37:24 (1788266244)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.7153 s, 9.0 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-ffff9a2f48dac800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.361596
Iter 1/10: OSS cache speed: 0.432945
Iter 1/10: ladvise speed: 0.417624
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.404238
Iter 2/10: OSS cache speed: 0.441634
Iter 2/10: ladvise speed: 0.382216
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.394766
Iter 3/10: OSS cache speed: 0.396007
Iter 3/10: ladvise speed: 0.459696
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.440332
Iter 4/10: OSS cache speed: 0.484027
Iter 4/10: ladvise speed: 0.510387
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.442278
Iter 5/10: OSS cache speed: 0.52291
Iter 5/10: ladvise speed: 0.460856
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.513236
Iter 6/10: OSS cache speed: 0.607589
Iter 6/10: ladvise speed: 0.644573
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.602846
Iter 7/10: OSS cache speed: 0.677081
Iter 7/10: ladvise speed: 0.7009
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.625731
Iter 8/10: OSS cache speed: 0.752371
Iter 8/10: ladvise speed: 0.736847
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.640117
Iter 9/10: OSS cache speed: 0.762176
Iter 9/10: ladvise speed: 0.781964
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.647691
Iter 10/10: OSS cache speed: 0.745113
Iter 10/10: ladvise speed: 0.761795
Average uncached read: .50
Average speedup with OSS cached read:  .58 = +16%
Average speedup with ladvise willread:  .58 = +16%
Speedup with OSS cached read less than 20%,  got 16%. Skipping ladvise willread check.
fail_loc=0