== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:35:50 (1723253750)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.61769 s, 40.1 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-ffff88012a5d6800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.77787
Iter 1/10: OSS cache speed: 2.94304
Iter 1/10: ladvise speed: 2.85035
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.77604
Iter 2/10: OSS cache speed: 2.73606
Iter 2/10: ladvise speed: 2.73841
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.54259
Iter 3/10: OSS cache speed: 2.67066
Iter 3/10: ladvise speed: 2.68648
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.71343
Iter 4/10: OSS cache speed: 2.72297
Iter 4/10: ladvise speed: 2.75414
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.64208
Iter 5/10: OSS cache speed: 1.45254
Iter 5/10: ladvise speed: 1.00212
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.919437
Iter 6/10: OSS cache speed: 1.07766
Iter 6/10: ladvise speed: 1.26654
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.1707
Iter 7/10: OSS cache speed: 1.18512
Iter 7/10: ladvise speed: 1.07433
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.20092
Iter 8/10: OSS cache speed: 1.16504
Iter 8/10: ladvise speed: 1.45194
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.82946
Iter 9/10: OSS cache speed: 1.74312
Iter 9/10: ladvise speed: 1.74783
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.80512
Iter 10/10: OSS cache speed: 2.08454
Iter 10/10: ladvise speed: 2.38208
Average uncached read: 2.03
Average speedup with OSS cached read: 1.97 = +-2.95%
Average speedup with ladvise willread: 1.99 = +-1.97%
Speedup with OSS cached read less than 20%, got -2.95%. Skipping ladvise willread check.
fail_loc=0