== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:38:46 (1786203526)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.33624 s, 11.2 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-ffff8c1b84f24000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.00275
Iter 1/10: OSS cache speed: 0.988667
Iter 1/10: ladvise speed: 2.00152
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.03693
Iter 2/10: OSS cache speed: 1.18459
Iter 2/10: ladvise speed: 1.0612
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.03433
Iter 3/10: OSS cache speed: 1.17936
Iter 3/10: ladvise speed: 1.08385
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.01511
Iter 4/10: OSS cache speed: 1.17914
Iter 4/10: ladvise speed: 1.15199
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.07704
Iter 5/10: OSS cache speed: 1.92884
Iter 5/10: ladvise speed: 2.20686
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.22511
Iter 6/10: OSS cache speed: 1.57533
Iter 6/10: ladvise speed: 1.05196
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.05213
Iter 7/10: OSS cache speed: 1.03239
Iter 7/10: ladvise speed: 1.26114
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.15385
Iter 8/10: OSS cache speed: 1.50371
Iter 8/10: ladvise speed: 1.81457
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.02011
Iter 9/10: OSS cache speed: 0.622996
Iter 9/10: ladvise speed: 0.55092
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.587652
Iter 10/10: OSS cache speed: 0.620676
Iter 10/10: ladvise speed: 0.652953
Average uncached read: 1.32
Average speedup with OSS cached read:  1.18 = +-10%
Average speedup with ladvise willread:  1.28 = +-3%
Speedup with OSS cached read less than 20%,  got -10%. Skipping ladvise willread check.
fail_loc=0