From: Florian Weimer <fweimer@redhat.com>
To: Adhemerval Zanella via Libc-alpha <libc-alpha@sourceware.org>
Cc: Adhemerval Zanella <adhemerval.zanella@linaro.org>,
crrodriguez@opensuse.org
Subject: Re: [PATCH 3/4] linux: Use /sys/devices/system/cpu/possible on __get_nprocs_conf
Date: Wed, 05 May 2021 20:06:27 +0200 [thread overview]
Message-ID: <87sg31awd8.fsf@oldenburg.str.redhat.com> (raw)
In-Reply-To: <871ralcbha.fsf@oldenburg.str.redhat.com> (Florian Weimer's message of "Wed, 05 May 2021 19:54:41 +0200")
* Florian Weimer:
> * Adhemerval Zanella via Libc-alpha:
>
>> + /* The entry is in the form of '[cpuX]-[cpuY]'. */
>> + char buf[2 * INT_STRLEN_BOUND (unsigned int) + 1];
>> +
>> + ssize_t n = __read_nocancel (fd, buf, sizeof (buf));
>> + if (n > 0)
>> + {
>> + buf[n] = '\0';
>> +
>> + /* Start on the right, to find highest node number. */
>> + int m = 1;
>> + while (--n)
>> + {
>> + if ((buf[n] == ',') || (buf[n] == '-'))
>> + break;
>> + /* Ignore '\n' */
>> + if (! isdigit (buf[n]))
>> + continue;
>> + result += (buf[n] - '0') * m;
>> + m *= 10;
>> + }
>> + }
>> +
>> + __close_nocancel (fd);
>> + return result + 1;
>> }
>
> I think the /online and /possible files have the same layout, so you
> could use both.
Sorry, I meant to write: “so you could use *one parser for* both”
Florian
next prev parent reply other threads:[~2021-05-05 18:06 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-29 18:25 [PATCH 1/4] Remove architecture specific sched_cpucount optimizations Adhemerval Zanella
2021-03-29 18:25 ` [PATCH 2/4] linux: Use sched_getaffinity for __get_nprocs (BZ #27645) Adhemerval Zanella
2021-04-27 15:38 ` Florian Weimer
2021-03-29 18:25 ` [PATCH 3/4] linux: Use /sys/devices/system/cpu/possible on __get_nprocs_conf Adhemerval Zanella
2021-05-05 16:53 ` Adhemerval Zanella
2021-05-05 17:54 ` Florian Weimer
2021-05-05 18:06 ` Florian Weimer [this message]
2021-05-06 13:03 ` Adhemerval Zanella
2021-05-06 13:51 ` Florian Weimer
2021-05-06 20:07 ` Adhemerval Zanella
2021-05-07 11:07 ` Florian Weimer
2021-05-07 12:43 ` Adhemerval Zanella
2021-05-06 13:17 ` Adhemerval Zanella
2021-03-29 18:25 ` [PATCH 4/4] linux: Remove /proc/cpuinfo fallback on alpha and sparc Adhemerval Zanella
2021-05-05 16:53 ` Adhemerval Zanella
2021-05-05 16:52 ` [PATCH 1/4] Remove architecture specific sched_cpucount optimizations Adhemerval Zanella
2021-05-05 17:28 ` Florian Weimer
2021-05-05 18:25 ` Paul Eggert
2021-05-05 19:52 ` Noah Goldstein
2021-05-06 12:22 ` Adhemerval Zanella
2021-05-06 18:34 ` Noah Goldstein
2021-05-06 13:33 ` Adhemerval Zanella
2021-05-06 13:43 ` Florian Weimer
2021-05-06 16:16 ` Adhemerval Zanella
2021-05-06 16:42 ` Florian Weimer
2021-05-06 16:54 ` Adhemerval Zanella
2021-05-06 17:12 ` Paul Eggert
2021-05-06 17:51 ` Adhemerval Zanella
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