== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:18:01 (1740485881)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.69533 s, 38.9 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-ffff8800b3925800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.63031
Iter 1/10: OSS cache speed: 2.7499
Iter 1/10: ladvise speed: 2.83702
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.6288
Iter 2/10: OSS cache speed: 2.78664
Iter 2/10: ladvise speed: 2.6641
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.75761
Iter 3/10: OSS cache speed: 2.60448
Iter 3/10: ladvise speed: 2.59891
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.69044
Iter 4/10: OSS cache speed: 2.67888
Iter 4/10: ladvise speed: 2.73059
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.72383
Iter 5/10: OSS cache speed: 2.70783
Iter 5/10: ladvise speed: 2.72019
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.65805
Iter 6/10: OSS cache speed: 2.65296
Iter 6/10: ladvise speed: 2.76025
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.76938
Iter 7/10: OSS cache speed: 2.63244
Iter 7/10: ladvise speed: 2.70592
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.75045
Iter 8/10: OSS cache speed: 2.76338
Iter 8/10: ladvise speed: 2.53209
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.66473
Iter 9/10: OSS cache speed: 2.71966
Iter 9/10: ladvise speed: 2.68308
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.03881
Iter 10/10: OSS cache speed: 2.33021
Iter 10/10: ladvise speed: 2.27821
Average uncached read: 2.63
Average speedup with OSS cached read:  2.66 = +1%
Average speedup with ladvise willread:  2.65 = +0%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0