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5c647408c7
The Intel Optimizaton Manual states that branches with relative offsets greater than 2GB suffer a penalty. They cite a 6% improvement when this is avoided. Our code doesn't rely heavily on dynamically linked libraries, so I don't expect a similar win, but it's still better to do it than not. Eliminate long branches by asking the dynamic linker to restrict itself to the lower 4GB of the address space. I saw that it maps libraries at 1GB+ addresses, so this satisfies the limitation. Fix is from the Intel Optimization Manual as well. This change was ported from ScyllaDB Enterprise. Closes scylladb/scylladb#22498
34 lines
967 B
Desktop File
34 lines
967 B
Desktop File
[Unit]
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Description=Scylla Server
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Wants=scylla-housekeeping-restart.timer
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Wants=scylla-housekeeping-daily.timer
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# This will only requires for abrt < 2.14
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Conflicts=abrt-ccpp.service
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[Service]
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Type=notify
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LimitCORE=infinity
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LimitMEMLOCK=infinity
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LimitNOFILE=800000
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LimitAS=infinity
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LimitNPROC=8096
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# Intel Golden Cove branches > 2GB occupy more slots in the branch target buffer,
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# so map libraries close to the executable for shorter branches.
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Environment=LD_PREFER_MAP_32BIT_EXEC=1
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EnvironmentFile=/etc/sysconfig/scylla-server
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EnvironmentFile=/etc/scylla.d/*.conf
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ExecStartPre=+/opt/scylladb/scripts/scylla_prepare
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ExecStart=/usr/bin/scylla $SCYLLA_ARGS $SEASTAR_IO $DEV_MODE $CPUSET $MEM_CONF
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ExecStopPost=+/opt/scylladb/scripts/scylla_stop
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TimeoutStartSec=1y
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TimeoutStopSec=900
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Restart=on-abnormal
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User=scylla
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OOMScoreAdjust=-950
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SyslogLevelPrefix=false
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AmbientCapabilities=CAP_SYS_NICE CAP_IPC_LOCK
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Slice=scylla-server.slice
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[Install]
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WantedBy=multi-user.target
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