#include "types.hh"
#include "util.hh"
#include "affinity.hh"

#if HAVE_SCHED_H
#include <sched.h>
#endif

namespace nix {


#if HAVE_SCHED_SETAFFINITY
static bool didSaveAffinity = false;
static cpu_set_t savedAffinity;
#endif


void setAffinityTo(int cpu)
{
#if HAVE_SCHED_SETAFFINITY
    if (sched_getaffinity(0, sizeof(cpu_set_t), &savedAffinity) == -1) return;
    didSaveAffinity = true;
    printMsg(lvlDebug, format("locking this thread to CPU %1%") % cpu);
    cpu_set_t newAffinity;
    CPU_ZERO(&newAffinity);
    CPU_SET(cpu, &newAffinity);
    if (sched_setaffinity(0, sizeof(cpu_set_t), &newAffinity) == -1)
        printMsg(lvlError, format("failed to lock thread to CPU %1%") % cpu);
#endif
}


int lockToCurrentCPU()
{
#if HAVE_SCHED_SETAFFINITY
    int cpu = sched_getcpu();
    if (cpu != -1) setAffinityTo(cpu);
    return cpu;
#else
    return -1;
#endif
}


void restoreAffinity()
{
#if HAVE_SCHED_SETAFFINITY
    if (!didSaveAffinity) return;
    if (sched_setaffinity(0, sizeof(cpu_set_t), &savedAffinity) == -1)
        printMsg(lvlError, "failed to restore affinity %1%");
#endif
}


}
ref='/guix/'>summary</a><a href='/guix/refs/?id=bbc2fb0d52128c85c92251ed36d8063b3dcf3c3a'>refs</a><a class='active' href='/guix/log/etc/guix-daemon.service.in'>log</a><a href='/guix/tree/etc/guix-daemon.service.in?id=bbc2fb0d52128c85c92251ed36d8063b3dcf3c3a'>tree</a><a href='/guix/commit/etc/guix-daemon.service.in?id=bbc2fb0d52128c85c92251ed36d8063b3dcf3c3a'>commit</a><a href='/guix/diff/etc/guix-daemon.service.in?id=bbc2fb0d52128c85c92251ed36d8063b3dcf3c3a'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/etc/guix-daemon.service.in'>
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<div class='path'>path: <a href='/guix/log/?id=bbc2fb0d52128c85c92251ed36d8063b3dcf3c3a'>root</a>/<a href='/guix/log/etc?id=bbc2fb0d52128c85c92251ed36d8063b3dcf3c3a'>etc</a>/<a href='/guix/log/etc/guix-daemon.service.in?id=bbc2fb0d52128c85c92251ed36d8063b3dcf3c3a'>guix-daemon.service.in</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/etc/guix-daemon.service.in?id=bbc2fb0d52128c85c92251ed36d8063b3dcf3c3a&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-07-07 23:54:20 -0400'>2021-07-07</span></td><td><a href='/guix/commit/etc/guix-daemon.service.in?id=4cbe0127a668cbcc64087c5d311308b59d39b104'>guix-install.sh: Prompt for configuring substitutes discovery.</a><span class='msg-avail'>...<span class='msg-tooltip'>Also ensure prompt_yes_no always print the message with a trailing space,
which is more pleasing to the eye.

* etc/guix-daemon.conf.in &lt;--discover=no&gt;: New guix-daemon option.
* etc/guix-daemon.service.in: Likewise.
* etc/init.d/guix-daemon.in: Likewise.
* etc/openrc/guix-daemon.in: Likewise.
* etc/guix-install.sh (configure_substitute_discovery): New procedure.
(sys_enable_guix_daemon): Ask the user whether automatic substitute discovery
should be enabled.  Set the '--discover' argument accordingly.
(prompt_yes_no): Add a trailing space to the message.
(sys_authorize_build_farms): Remove trailing space from the message argument.
* NEWS (Distribution): Add news.
</span></span></td><td>Maxim Cournoyer</td></tr>