== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 23:07:22 (1763352442)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.42373 s, 14.1 MB/s
llite.lustre-ffff8f68edca0000.read_ahead_stats=clear
llite.lustre-ffff8f68edca0000.read_ahead_stats=
snapshot_time             1763352458.803162286 secs.nsecs
start_time                1763352453.133342962 secs.nsecs
elapsed_time              5.669819324 secs.nsecs
hits                      25567 samples [pages]
misses                    33 samples [pages]
zero_size_window          4 samples [pages]
async_readahead           2 samples [pages]
failed_to_fast_read       36 samples [pages]
mmap_range_read           28 samples [pages]
readahead_pages           35 samples [pages] 8 4096 25567
/usr/bin/fio
thp                     : Memory Advise Huge Page
read_test: (g=0): rw=read, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=mmap, iodepth=1
fio-3.19
Starting 1 process

read_test: (groupid=0, jobs=1): err= 0: pid=291058: Sun Nov 16 23:13:23 2025
  read: IOPS=15, BW=15.0MiB/s (15.8MB/s)(5120MiB/340542msec)
    clat (msec): min=15, max=2578, avg=66.26, stdev=92.87
     lat (msec): min=15, max=2578, avg=66.26, stdev=92.87
    clat percentiles (msec):
     |  1.00th=[   26],  5.00th=[   37], 10.00th=[   41], 20.00th=[   47],
     | 30.00th=[   52], 40.00th=[   54], 50.00th=[   57], 60.00th=[   63],
     | 70.00th=[   69], 80.00th=[   75], 90.00th=[   84], 95.00th=[   93],
     | 99.00th=[  167], 99.50th=[  226], 99.90th=[ 1804], 99.95th=[ 2299],
     | 99.99th=[ 2567]
   bw (  KiB/s): min= 2039, max=34816, per=100.00%, avg=16301.57, stdev=4269.59, samples=631
   iops        : min=    1, max=   34, avg=15.51, stdev= 4.28, samples=631
  lat (msec)   : 20=0.53%, 50=26.23%, 100=69.47%, 250=3.40%, 500=0.02%
  lat (msec)   : 750=0.08%, 1000=0.02%, 2000=0.18%, >=2000=0.08%
  cpu          : usr=0.84%, sys=72.26%, ctx=24872, majf=1830, minf=1309160
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=5120,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=15.0MiB/s (15.8MB/s), 15.0MiB/s-15.0MiB/s (15.8MB/s-15.8MB/s), io=5120MiB (5369MB), run=340542-340542msec