== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:12:55 (1735099975)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.7552 s, 38.1 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-ffff88012a525800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.03927
Iter 1/10: OSS cache speed: 1.54483
Iter 1/10: ladvise speed: 1.4531
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.64723
Iter 2/10: OSS cache speed: 2.27292
Iter 2/10: ladvise speed: 2.74863
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.39006
Iter 3/10: OSS cache speed: 2.55742
Iter 3/10: ladvise speed: 2.45888
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.48336
Iter 4/10: OSS cache speed: 2.7981
Iter 4/10: ladvise speed: 2.6391
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.7638
Iter 5/10: OSS cache speed: 2.78109
Iter 5/10: ladvise speed: 2.68532
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.50037
Iter 6/10: OSS cache speed: 2.47204
Iter 6/10: ladvise speed: 2.31941
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.26431
Iter 7/10: OSS cache speed: 2.26821
Iter 7/10: ladvise speed: 2.34003
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.55973
Iter 8/10: OSS cache speed: 1.39242
Iter 8/10: ladvise speed: 1.02444
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.45221
Iter 9/10: OSS cache speed: 1.31238
Iter 9/10: ladvise speed: 1.98189
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.41036
Iter 10/10: OSS cache speed: 1.73524
Iter 10/10: ladvise speed: 1.73647
Average uncached read: 1.95
Average speedup with OSS cached read:  2.11 = +8%
Average speedup with ladvise willread:  2.13 = +9%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0