== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:20:23 (1772468423)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.99609 s, 17.5 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-ffff94cc432e4800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.04526
Iter 1/10: OSS cache speed: 0.953865
Iter 1/10: ladvise speed: 0.895422
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.72253
Iter 2/10: OSS cache speed: 0.815963
Iter 2/10: ladvise speed: 0.870382
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.803605
Iter 3/10: OSS cache speed: 1.02239
Iter 3/10: ladvise speed: 1.04719
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.19567
Iter 4/10: OSS cache speed: 1.11488
Iter 4/10: ladvise speed: 1.06383
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.613381
Iter 5/10: OSS cache speed: 0.535966
Iter 5/10: ladvise speed: 0.669219
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.252185
Iter 6/10: OSS cache speed: 0.388546
Iter 6/10: ladvise speed: 0.371539
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.311536
Iter 7/10: OSS cache speed: 0.332768
Iter 7/10: ladvise speed: 0.328145
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.363927
Iter 8/10: OSS cache speed: 0.338517
Iter 8/10: ladvise speed: 0.321228
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.267295
Iter 9/10: OSS cache speed: 0.366571
Iter 9/10: ladvise speed: 0.371316
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.352477
Iter 10/10: OSS cache speed: 0.364872
Iter 10/10: ladvise speed: 0.428508
Average uncached read: .59
Average speedup with OSS cached read:  .62 = +5%
Average speedup with ladvise willread:  .63 = +6%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0