== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 14:34:54 (1777055694)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.9951 s, 8.1 MB/s
llite.lustre-ffff89cc4a087000.read_ahead_stats=clear
llite.lustre-ffff89cc4a087000.read_ahead_stats=
snapshot_time             1777055729.251921436 secs.nsecs
start_time                1777055711.023634640 secs.nsecs
elapsed_time              18.228286796 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          6 samples [pages]
failed_to_reach_end       1 samples [pages]
failed_to_fast_read       230 samples [pages]
mmap_range_read           225 samples [pages]
readahead_pages           225 samples [pages] 8 128 25370
/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=226496: Fri Apr 24 14:58:17 2026
  read: IOPS=3, BW=3850KiB/s (3942kB/s)(5120MiB/1361938msec)
    clat (msec): min=71, max=1725, avg=265.57, stdev=185.38
     lat (msec): min=71, max=1725, avg=265.58, stdev=185.38
    clat percentiles (msec):
     |  1.00th=[  126],  5.00th=[  142], 10.00th=[  153], 20.00th=[  165],
     | 30.00th=[  176], 40.00th=[  186], 50.00th=[  197], 60.00th=[  213],
     | 70.00th=[  249], 80.00th=[  355], 90.00th=[  430], 95.00th=[  558],
     | 99.00th=[ 1217], 99.50th=[ 1334], 99.90th=[ 1536], 99.95th=[ 1603],
     | 99.99th=[ 1720]
   bw (  KiB/s): min= 1878, max= 8192, per=100.00%, avg=4172.64, stdev=1828.21, samples=2504
   iops        : min=    1, max=    8, avg= 3.42, stdev= 1.93, samples=2504
  lat (msec)   : 100=0.06%, 250=70.27%, 500=23.05%, 750=3.91%, 1000=0.80%
  lat (msec)   : 2000=1.91%
  cpu          : usr=0.40%, sys=56.48%, ctx=26031, majf=5423, minf=1305565
  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=3850KiB/s (3942kB/s), 3850KiB/s-3850KiB/s (3942kB/s-3942kB/s), io=5120MiB (5369MB), run=1361938-1361938msec